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Journal articles on the topic 'Landslide stabilization'
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1
Ramesh, Gomasa. "Slope and Landslide Stabilization: A Review." Indian Journal of Structure Engineering 1, no. 2 (November 10, 2021): 13–16. http://dx.doi.org/10.35940/ijse.a1304.111221.
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Slope stabilization is the one of important fundamental aspect for preventing landslides. For a safer design of the structure, slope stabilization is very important. There are various studies conducted on slope stabilization and landslide mitigation. Geotechnical Engineers and Structural Engineers play an important role in analyzing and designing slope stabilization and landslide mitigation and prevention. This study is also helpful for the design of slopes. The study also helps for quick assessment of slopes. This paper also explained stabilization methods and techniques for slope. This study is also helpful in improving the shear strength of the slope of soil. This paper helps to understand basic knowledge on slope stabilization and landslides for every Engineer easily.
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Solsky, Stanislav V., and Sofya A. Bykovskaya. "Optimizing the landslide-prone slope stabilization." Vestnik MGSU, no. 10 (October 2019): 1258–71. http://dx.doi.org/10.22227/1997-0935.2019.10.1258-1271.
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Introduction. Nowadays, the study of landslide processes is one of the most intensive aspects of construction and maintenance of industrial and civil buildings and installations. The landslides violate the stability of foundations and entire complexes of installations, so the assessment of the stability of the slopes is the most important task before starting the construction. Currently, there is a large number of landslide classifications, which characterize the conditions of their formation, the history of geological development, their age, and structure. Normative documentation gives three ways of slope slump control: preventive, restricting, and liquidation ones. However, this source does not give systematic validity of the engineering solutions. The study sets the following tasks: to develop an algorithm for the optimal choice of rational slope strengthening in landslide construction conditions and to test it with a specific example.
Materials and methods. The study analyzed the publications on theoretical and practical experience in dealing with landslides as well as normative documents. Numerical simulation methods were used to calculate the slope stability when testing the algorithm.
Results. Using the introduced classification, the study presented an algorithm that makes it possible to choose a rational way of slope strengthening under landslide construction conditions. The concept of the algorithm allows step-by-step approximating parameters of a landslide-prone slope model to the real conditions, on the one hand, and selecting the most reasonable anti-landslide measures, on the other hand. The developed algorithm was tested on the territory of a large industrial complex situated on river overflood plain fringes. By applying the value engineering comparison of several slope stabilization variants, the research has taken the most optimal one of them for realization.
Conclusions. The study developed the author’s classification and algorithm for the selection of optimal design solutions to stabilize landslide-prone slopes or slants. Successful approbation of the algorithm confirmed its practical applicability. The algorithm allows choosing the most effective complex for protection against landslides.
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Xie, Wan-li, Qianyi Guo, Jason Y. Wu, Ping Li, Hui Yang, and Maosheng Zhang. "Analysis of loess landslide mechanism and numerical simulation stabilization on the Loess Plateau in Central China." Natural Hazards 106, no. 1 (January 15, 2021): 805–27. http://dx.doi.org/10.1007/s11069-020-04492-w.
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AbstractLoess landslides have complicated deformation mechanisms. Accurately describing the internal failure deformation of loess landslides and establishing a theoretical method of landslide instability evaluation for the prevention of subsequent landslides have become important topics in western development project construction in China. This paper presents a case study of the Zhonglou Mountain landslide in Shaanxi Province, China. Based on field investigation results, a two-dimensional stability analysis model was constructed using the finite element method. Taking the deformation characteristics of the landslide as the research basis, the distribution laws of the displacement, stress, and shear strain of this landslide were identified with the strength reduction finite element numerical simulation method. Additionally, the safety factor was evaluated under normal and storm conditions. The numerical simulation results show that the horizontal tensile stress of the landslide was mainly distributed in the middle and upper parts of the landslide under normal conditions, while the vertical tensile stress was distributed near the sliding surface. Under heavy rainfall, the sliding force increased, and the anti-sliding force and anti-sliding section decreased; the location of the maximum shear strain shifted down from the middle and upper parts of the landslide body to the area with a shear crack, and the plastic shear strain area expanded along nearly the entire the sliding surface, leading to the occurrence of a landslide. Thus, the use of anti-slide piles to stabilize the landslide was proposed and tested. Monitoring points were arranged along the sliding surface to evaluate the displacement, stress, and strain responses. The on-site observation results agreed with the modeling results. The use of anti-slide piles was demonstrated to be an effective stabilization method for the Zhonglou Mountain landslide.
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Bednarczyk, Zbigniew. "Landslide Geohazard Monitoring, Early Warning and Stabilization Control Methods." Studia Geotechnica et Mechanica 36, no. 1 (March 1, 2014): 3–13. http://dx.doi.org/10.2478/sgem-2014-0001.
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Abstract This paper is a presentation of landslide monitoring, early warning and remediation methods recommended for the Polish Carpathians. Instrumentation included standard and automatic on-line measurements with the real-time transfer of data to an Internet web server. The research was funded through EU Innovative Economy Programme and also by the SOPO Landslide Counteraction Project. The landslides investigated were characterized by relatively low rates of the displacements. These ranged from a few millimetres to several centimetres per year. Colluviums of clayey flysch deposits were of a soil-rock type with a very high plasticity and moisture content. The instrumentation consisted of 23 standard inclinometers set to depths of 5-21 m. The starting point of monitoring measurements was in January 2006. These were performed every 1-2 months over the period of 8 years. The measurements taken detected displacements from several millimetres to 40 cm set at a depth of 1-17 m. The modern, on-line monitoring and early warning system was installed in May 2010. The system is the first of its kind in Poland and only one of several such real-time systems in the world. The installation was working with the Local Road Authority in Gorlice. It contained three automatic field stations for investigation of landslide parameters to depths of 12-16 m and weather station. In-place tilt transducers and innovative 3D continuous inclinometer systems with sensors located every 0.5 m were used. It has the possibility of measuring a much greater range of movements compared to standard systems. The conventional and real-time data obtained provided a better recognition of the triggering parameters and the control of geohazard stabilizations. The monitoring methods chosen supplemented by numerical modelling could lead to more reliable forecasting of such landslides and could thus provide better control and landslide remediation possibilities also to stabilization works which prevent landslides.
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Hearn, Gareth James, Martin S. P. Kerridge, and Phanthoudeth Pongpanya. "Landslide costs on the national road network of Laos, with some regional implications." Quarterly Journal of Engineering Geology and Hydrogeology 54, no. 4 (May 18, 2021): qjegh2021–023. http://dx.doi.org/10.1144/qjegh2021-023.
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Compared to most other countries in south and SE Asia, Laos has a low road network density and low traffic volumes. Much of the road network is located in mountainous terrain where landslides cause regular engineering damage and blockage to traffic. The wet season of 2018 was particularly severe and triggered many landslides that blocked roads for hours, and days in some cases. The cost of clearing these landslides amounted to an average of almost US$5000 per km. Because of the relatively low traffic volumes that use the mountain road network, traffic costs due to road blockage delays are generally significantly lower per kilometre than engineering costs. Nevertheless, economic analysis demonstrates that investments in landslide stabilization measures amounting to an average of US$50 000 for landslides above the road and US$120 000 for those below the road can be economically justified if, without these measures, long and frequent delays would ensue. In certain cases, investments much higher than these can be justified. A priority list for landslide stabilization is developed and outline cost estimates are prepared. Recommendations are made for enhanced landslide management and roadside slope improvement, and a comparison is made between the situation in Laos with that in Vietnam, Bhutan, Nepal and the Philippines. It is concluded that the imperative for investment will be even greater in these countries, and especially in Nepal and the Philippines, on account of the higher incidence of landslide hazards and greater volumes of road traffic.
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Basnet, Keshav, Dhruba Wagle, Sagar Bhattarai, and Biwas Babu Sadadev. "Analysis of Slope Stability for Kaande Landslide of Phewa Watershed, Pokhara, Nepal." Technical Journal 2, no. 1 (November 10, 2020): 11–21. http://dx.doi.org/10.3126/tj.v2i1.32823.
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Phewa watershed of Kaski, Nepal is constantly facing landslides and soil erosion problems. Andheri Khola sub-basin of Phewa watershed accounts the maximum amount of sediment inflow into Phewa Lake. Therefore Kaande Landslide of Andheri Khola sub-basin, located between Deurali and Paundur villages at the source zone of Andheri Khola is chosen for the slope stabilization to control the sediment flow. The main objective of the study was to analyze the slope stability condition of the landslide area for which the whole landslide area was divided into eight zones starting from the crown to the toe based on the major parameters like soil/rock type, slope inclination, spring source and surface water on the basis of field observation. The factor of safety of each zone was calculated based on stability analysis of an infinite slope of cohesive soils. Sieve analysis result shows the landslide area has coarse grained structure (gravel and sand) dominant. The factor of safety of the landslide was found to be from 0.281 to 0.710. The field assessment and factor of safety reveals the Kaande landslide to be unstable and further possibilities of landslides and soil erosion in the future. For mitigating the hazard, eco-friendly soil bio-engineering measures such as direct seeding of grasses/shrubs, grasses/shrubs/trees plantation, brush layering, and gabion wire bolster cylinders are recommended for slope stabilization based on the optimal techniques guidelines of Mercy Corps Nepal, 2014. It is recommended to apply the proposed mitigation measures as early as possible to prevent the further landslide hazard.
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Cobos, Guillermo, Miguel Ángel Eguibar, Francisco Javier Torrijo, and Julio Garzón-Roca. "A Case Study of a Large Unstable Mass Stabilization: “El Portalet” Pass at the Central Spanish Pyrenees." Applied Sciences 11, no. 16 (August 4, 2021): 7176. http://dx.doi.org/10.3390/app11167176.
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This case study presents the engineering approach conducted for stabilizing a landslide that occurred at “El Portalet” Pass in the Central Spanish Pyrenees activated due to the construction of a parking lot. Unlike common slope stabilization cases, measures projected here were aimed at slowing and controlling the landslide, and not completely stopping the movement. This decision was taken due to the slow movement of the landslide and the large unstable mass involved. The degree of success of the stabilization measures was assessed by stability analyses and data obtained from different geotechnical investigations and satellite survey techniques such as GB-SAR and DinSAR conducted by different authors in the area under study. The water table was found to be a critical factor in the landslide’s stability, and the tendency of the unstable slope for null movement (total stability) was related to the water table lowering process, which needs more than 10 years to occur due to regional and climatic issues. Results showed a good performance of the stabilization measures to control the landslide, demonstrating the effectiveness of the approach followed, and which became an example of a good response to the classical engineering duality cost–safety.
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Puzrin, Alexander M., and Andreas Schmid. "Progressive failure of a constrained creeping landslide." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 467, no. 2133 (March 30, 2011): 2444–61. http://dx.doi.org/10.1098/rspa.2011.0063.
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The ski resort town of St Moritz, Switzerland, is partially constructed on a large creeping landslide, which has been causing damage to buildings and infrastructure. At the town centre, the landslide is constrained by a rock outcrop, creating a compression zone in the sliding mass. After decades of gradual slowing down,s in the beginning of 1990s the landslide started to accelerate, in spite of the fact that the average yearly precipitation and the pore water pressure on the sliding surface remained fairly constant. The paper shows that a constrained creeping landslide experiences progressive failure caused by the propagation of a zone of intense shearing along the slip surface resulting in significant earth pressure increase and visco-plastic yielding of soil in the compression zone. This basic physical mechanism, relying on extensive laboratory and field tests and long-term displacement monitoring, explains the paradox of the St Moritz landslide acceleration. Although the model predicts that the landslide could eventually slow down, its displacements may become excessive for some buildings, requiring an early warning system and further stabilization of the historic Leaning Tower. In general, by predicting the onset of yielding, the model can provide an important timeframe for stabilization of constrained landslides.
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Angelopoulos, A., V. J. Soulis, and V. Malandraki. "GEOLOGICAL AND GEOTECHNICAL BEHAVIOUR OF EVINOS DAM FOLLOWING THE IMPOUNDMENT." Bulletin of the Geological Society of Greece 43, no. 3 (January 24, 2017): 1094. http://dx.doi.org/10.12681/bgsg.11283.
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The Evinos dam built between 1993 and 1997. The period of construction followed a period of rest until 2001. The impoundment of the Evinos Dam and the subsequent 3rd operational period took place between 2001 and 2005. The 4th period of operation commenced in February 2005 and concerns the period of regular operation of Dam Evinos after completion. During this period, sufficient data have been gathered for the evaluation of the geotechnical behaviour of both Evinos Dam itself and the stabilization works on the two landslides that occurred (Landslide of the left abutment ’93, Landslide of Ag.Demetrios-Arahova country road). Specialized personnel of the Department of the Evinos Dam of the Athens Water Supply and Sewage Company S.A are responsible for the in-situ collection of instrumental readings. On the other hand specialized personnel of the Division of Raw Water Intake of Athens Water Supply and Sewage Company S.A are assigned to evaluate the dam’s behaviour. The infiltration of water within the Dam’s core is continuously monitored together with the horizontal movement and settlement upstream and downstream the dam’s body through a considerable number of vibrating wire piezometers, earth pressure cells, extensiometers, inclinometers and surface monumental stations. The behaviour of the stabilization interventions in the landslide area’s are evaluated through measurement of topographic monuments ,open piezometers and drainage measurements. The evaluation of the instrumental measurerements confirms the expected behavior of the dam and the satisfactory performance of the stabilization interventions in the landslide area’s
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Wang, Jian, Wei Zhang, Chao-yang Xie, Qian Xiao, Yu-chen Zhu, and Bo Pan. "Forecasting Disastrous Characteristics of Highway Landslides Using the Material Point Method: A Surcharge-Induced Perspective." Advances in Civil Engineering 2020 (August 7, 2020): 1–13. http://dx.doi.org/10.1155/2020/8859344.
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Precisely forecasting the disastrous characteristics of landslides can address the optimized preliminary design of the highway landslide stabilization. In this paper, taking the surcharge-induced landslides as an example, we developed the models of the material point method (MPM), a novel meshless numerical method, to calculate the large deformation of the highway landslides, with the affordable computing power. After convincing verification of the MPM model to simulate a surcharge-induced soil landslide, 32 typical postfailure scenarios were analyzed to obtain the highway landslide run-out processes and disastrous characteristics, such as the sliding distance and speed of the leading edge and sliding body morphology. Moreover, linear regression equations of the maximal sliding distance and speed were deduced after verification, to forecast the reasonable avoiding distance. The maximal sliding distance and speed were found to be negatively linearly correlated with the internal frictional angle and cohesion of the soil, and positively linearly correlated with the surcharge and the slope angle, respectively. Optimized preliminary design, of the highways in the mountainous and hilly areas, can be performed based on those insights.
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Kogut, Janusz P. "Landslide formation modelling and surveying of the slope in unsaturated and saturated ground conditions." E3S Web of Conferences 133 (2019): 01010. http://dx.doi.org/10.1051/e3sconf/201913301010.
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The terrestrial laser scanner enables site remote sensing of the slopes in a simple and automated manner. Regular measurements with multiple scanner positioning might be applied in long term landslide monitoring. A detailed geological structural model allows for hazard assessment, and then for a slope stability assessment. Numerical model, along with the subsoil parameters, introduced into the Finite Element Method (FEM) software enables an estimation of landslide susceptibility and the possible displacements of the terrain in longer period of time, as well as, due to different loading cases. In this paper the formation of landslides and stability of the slope after the retaining structure establishment is analysed. Two analysed landslides have different origin and may be a threat even after stabilization works already maintained.
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Chaulagai, Kanchan. "Stabilization Measure Adopted for Controlling Landslide: A Case Study of Upper Mai Hydroelectric Project." Hydro Nepal: Journal of Water, Energy and Environment 21 (July 18, 2017): 11–14. http://dx.doi.org/10.3126/hn.v21i0.17815.
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Stability is the key issue in landslide stabilization. Methodology and component adopted in stabilizing the slide play vital role in this regards. In many occasion, stability measure adopted for controlling slide has been found to be unsuccessful, inadequate causing not only the safety risk but also huge economic loss. This paper describe history, effects, causes, stabilization measures and effectiveness of these measures played for controlling landslide of headwork area of Upper Mai Hydroelectric Project. The pioneering solution applied for landslide stabilization such as application of rock bolts, shotcrete and water management found to be highly effective in controlling the landslide. HYDRO Nepal JournalJournal of Water Energy and EnvironmentIssue: 21, July, 2017Page: 11-14Upload Date: July 18, 2017
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Shoaib, Muhammad, Wang Yang, Yang Liang, and Gohar Rehman. "Stability and Deformation Analysis of Landslide under Coupling Effect of Rainfall and Reservoir Drawdown." Civil Engineering Journal 7, no. 7 (July 1, 2021): 1098–111. http://dx.doi.org/10.28991/cej-2021-03091713.
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Landslides, a devastating hazard, continue to happen, affecting the lives of thousands of people each year. Fluctuation in the Reservoir Water Level (FRWL) is one of the leading features disturbing the slope stability in reservoir areas, drawdown is more crucial than the rise to the stability of landslide. Latest studies grounded on field investigation and monitoring data propose that landslides in reservoir areas are initiated not solely by one issue like precipitation or FRWL, however conjointly by their joint actions. Zhulinwan landslide in Chongqing, China, Three Gorges Reservoir (TGR) area was analyzed by field investigation and numerical modelling to evaluate the characteristics of the landslide. The changes in landslide stability and deformation under the effect of reservoir drawdown and rainfall is analyzed using GEOSLOPE Software. The seepage analysis is done using SEEP W Model, afterward deformation and stability analysis using SLOPE W and SIGMA W respectively. The analysis confirmed that the coupling effect of reservoir drawdown at 1.2 m/d and rainstorm of once in 50 years return period makes the landslide unstable. Moreover, deformation at the same condition is maximum 0.049 m. The findings may be used by local authorities to help make decisions about slope stabilization in the event of a confirmed significant rainfall event. Doi: 10.28991/cej-2021-03091713 Full Text: PDF
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Dobiašová, Dagmar, Jozef Streďanský, and Lucia Tátošová. "DETERMINANTS OF SLOPE STABILITY REDUCTION / DETERMINANTY ZNI ŽOVANIA STABILITY SVAHU." Acta Horticulturae et Regiotectuare 16, no. 2 (December 1, 2013): 29–32. http://dx.doi.org/10.2478/ahr-2013-0007.
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Abstract The formation or activation of landslide movements in Podtatranska kotlina is quite common, as it is flysh and volcanic area. There is a high incidence of sandstones in this area. The sandstones crumble and weather, and this is the reason why the subsoil becomes unstable. The rainfall is accumulated, and there is a danger of soil sliding down. There was located groundwater level in the central part of the slope (in the height of 30 cm), and in some parts, the water accumulation occurred in the depression places on the landslide body. There were created small landslide lakes, where the water was held during the year. The slope was soaked and the erosion started to increase. The slope with its instability has pushed the construction of road that leads underneath the heel of the slope. Neglected and improper construction in areas of slope landslides has become a relatively common phenomenon. Stabilization measures are often made up only when real problem occurs. An anthropogenic activity usually starts this problem. This refers to deforestation, grassing or deformation of slope stability in the heel by improper construction. The landslide was not the first one in the area. In 1898, there was the first landslide, but it was not as intensive as this one. Retaining wall was the only one stabilization measure which was built in that time. It also had a drainage outfall. However, during the summer months in 2010, the stabilization measure was disrupted and cracked. This occurrence started after the slope separation and by the foremost pressure on the given wing wall. During our measurements, we found out that in that area, there was a loss of plant cover, erosion accrued and soil physical properties changed. Our aim is to show the seriousness of the situation and propose appropriate stabilizing measures.
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Xiao, Shi Guo, and Jing Yang. "Internal Forces of Double-Row Pile Slope Stabilization Systems Influenced by of Pile Row Separation." Advanced Materials Research 168-170 (December 2010): 127–32. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.127.
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A double-row anti-slide pile system can effectively control large landslide thrusts within a large-scale talus landslide. In such a system, the separation of the up-slope and down-slope rows of piles is a key factor that impacts the distribution of their internal forces. Common large-scale talus landslides, which are characterized by a curved slip surface that is gentle in the front and steep in the rear, are discussed in this paper. The mechanical characteristics of double piles positioned at a net separation between rows of 23.8a (where a is the length of the long side of rectangular cross section of a pile), 16.3a, 10.7a, 6a and 2a have been investigated by finite element analyses. Based on this investigation, internal forces of the pile body are found to not change with row separation monotonously. Rather, they are closely related to the pile positions (i.e. within the anti-slide or slide section of the slip surface). When the rear piles are fixed at the anti-slide section of the landslide mass, the landslide thrust on the up-slope side of the rear piles and the slope resistance on the down-slope side increase gradually as the row separation becomes larger. As a result, the comprehensive mechanical effect of double piles tends to worsen. We advise that the optimal net separation between rows of piles is 2a to 4a.
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Macciotta, Renato, and Michael T. Hendry. "Remote Sensing Applications for Landslide Monitoring and Investigation in Western Canada." Remote Sensing 13, no. 3 (January 21, 2021): 366. http://dx.doi.org/10.3390/rs13030366.
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Transportation infrastructure in mountainous terrain and through river valleys is exposed to a variety of landslide phenomena. This is particularly the case for highway and railway corridors in Western Canada that connect towns and industries through prairie valleys and the Canadian cordillera. The fluidity of these corridors is important for the economy of the country and the safety of workers, and users of this infrastructure is paramount. Stabilization of all active slopes is financially challenging given the extensive area where landslides are a possibility, and monitoring and minimization of slope failure consequences becomes an attractive risk management strategy. In this regard, remote sensing techniques provide a means for enhancing the monitoring toolbox of the geotechnical engineer. This includes an improved identification of active landslides in large areas, robust complement to in-place instrumentation for enhanced landslide investigation, and an improved definition of landslide extents and deformation mechanisms. This paper builds upon the extensive literature on the application of remote sensing techniques and discusses practical insights gained from a suite of case studies from the authors’ experience in Western Canada. The review of the case studies presents a variety of landslide mechanisms and remote sensing technologies. The aim of the paper is to transfer some of the insights gained through these case studies to the reader.
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Yu, Yang, Xingmin Li, Xiaohua Pan, and Qing Lü. "A Robust and Efficient Method of Designing Piles for Landslide Stabilization." Environmental and Engineering Geoscience 26, no. 4 (August 19, 2020): 481–92. http://dx.doi.org/10.2113/eeg-2333.
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ABSTRACT Stabilizing pile is a widely used method to reduce the development of large-scale landslides. Optimizing the pile geometry is a great challenge in the design of stabilizing piles with the purpose of cost-effectiveness, especially for soil strength parameters with large uncertainty. The objective of this study is to propose a robust and efficient method of designing piles for landslide stabilization with the consideration of the safety of slope, uncertainty of soil parameters, and cost of stabilizing piles. A new response surface, which incorporates soil parameters and stabilizing force into a quadratic polynomial function, is first proposed. Unknown coefficients of the quadratic polynomial function are solved with a numerical method at typical sampling points. Based on the solved quadratic polynomial function, the mean and standard deviation of factor of safety (FOS) of the pile-stabilized slope as well as the signal-to-noise factor are then calculated in order to evaluate the design robustness. A framework based on the concept of robust geotechnical design is presented, and its feasibility is illustrated by two cases of soil slopes. The results indicate that the proposed robust geotechnical design method could be used to optimize the design of landslide-stabilizing piles.
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Seyed Ata Ollah, Hosseini, Shahroodi Elham Fazeli, Lotfalian Majid, and Parsakhoo Aidin. "Evaluating the effect of biological stabilization on landslide control at the edge of forest road." Journal of Forest Science 63, No. 11 (November 30, 2017): 496–502. http://dx.doi.org/10.17221/99/2017-jfs.
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Landslide is one of the negative sides of building non-standard roads in forest areas. The aim of the present study was to assess the effect of biological stabilization on landslide at the edge of forest roads in south and north aspects. For this purpose, in Neka forest (Mazandaran province) three treatments including control, sliding and stabilized areas covered by 35-years-old even-aged alder trees were selected. Benchmarking and soil sampling were conducted during three periods including July, November after rainfall events and March after rainfall events. The results showed that the mean movement of landslide in north direction was 9 cm, while this value was 6 cm in south direction. Sliding in north direction was 32% more than that in south direction. Biological stabilization by alder in north and south direction caused a 33 and 66% reduction in landslide movement, respectively. The characteristics of soil mechanics were different between stabilized and sliding areas. Besides, the soil texture in north direction for control and stabilized areas was clay with high liquid limit (CH) and for sliding area it was clay with low liquid limit, while this value in south direction was CH for three treatments of control, stabilized and sliding areas. To plan biological stabilization, the mechanical characteristics of soil, site features, and appropriate plant species should be considered as important factors.
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Bednarczyk, Zbigniew. "Evaluating Landslide Remediation Methods Used in the Carpathian Mountains, Poland." Environmental and Engineering Geoscience 25, no. 4 (November 8, 2019): 272–88. http://dx.doi.org/10.2113/eeg-2158.
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ABSTRACT The aim of this study was to evaluate the results of landslide remediation in the Polish Carpathians. The research for safeguarding the roads and infrastructure was conducted in the years 2005–2018 in nine landslide areas. The interpretation of engineering geology conditions was complex due to the soil-rock nature of the flysch sediment. Movements were activated after heavy rainfalls. In two cases, triggers were connected with the undercutting of the slope or external loading. The research methods included mapping, drilling, index, oedometer, direct shear tests, ground-penetrating radar scanning, and numerical modeling. To date, 15–59 series of inclinometer and piezometer network readings in 30 locations have been taken. Three online stations have been delivering continuous, nearly real-time data since May 2010. Displacements before the remediation ranged from a few millimeters to several centimeters. The proposed remediation methods included piles, micropiles, anchors, retaining walls, and drainage systems. Six stabilization projects were prepared and checked using the limit equilibrium method and finite element method modeling. The research shows that in five landslide areas, the proposed remedial works were effective. Two other partial stabilization works limited the scope of the movements but did not eliminate the risk. At two locations, only temporary repairs were conducted. Proper identification of the landslide triggers and activity is standard for the recognition of counteraction possibilities and could lower stabilization costs. The selected methods delivered data for remedial decisions. However, effective remediation of an active Carpathian landslide is difficult. It requires individually calibrated investigations, representative monitoring, and careful design of stabilization.
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Carrión-Mero, Paúl, Néstor Montalván-Burbano, Fernando Morante-Carballo, Adolfo Quesada-Román, and Boris Apolo-Masache. "Worldwide Research Trends in Landslide Science." International Journal of Environmental Research and Public Health 18, no. 18 (September 7, 2021): 9445. http://dx.doi.org/10.3390/ijerph18189445.
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Landslides are generated by natural causes and by human action, causing various geomorphological changes as well as physical and socioeconomic loss of the environment and human life. The study, characterization and implementation of techniques are essential to reduce land vulnerability, different socioeconomic sector susceptibility and actions to guarantee better slope stability with a significant positive impact on society. The aim of this work is the bibliometric analysis of the different types of landslides that the United States Geological Survey (USGS) emphasizes, through the SCOPUS database and the VOSviewer software version 1.6.17, for the analysis of their structure, scientific production, and the close relationship with several scientific fields and its trends. The methodology focuses on: (i) search criteria; (ii) data extraction and cleaning; (iii) generation of graphs and bibliometric mapping; and (iv) analysis of results and possible trends. The study and analysis of landslides are in a period of exponential growth, focusing mainly on techniques and solutions for the stabilization, prevention, and categorization of the most susceptible hillslope sectors. Therefore, this research field has the full collaboration of various authors and places a significant focus on the conceptual evolution of the landslide science.
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Pronko, Nina Anatolyevna, Victor Vladislavovich Korsak, and Lyudmila Vladimirovna Semykina. "The solution of landslide problems in the Saratov region." Agrarian Scientific Journal, no. 1 (January 22, 2020): 68–73. http://dx.doi.org/10.28983/asj.y2020i1pp68-73.
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They are presented data on the development of landslide processes in the Saratov region, the territory of which is one of the most landslide hazardous due to geological, tectonic and hydrogeological conditions, deep rugged terrain, active erosion, climatic features and anthropogenic factors. The directions of solving the problem of reducing the negative impact of landslides on the condition of territories are shown, the main of which are identification and assessment of the threat, stabilization and retention of the landslide massif. The landslide hazard is determined on the basis of geotechnical, geodetic, hydrogeological, hydrological surveys, weather observations, monitoring and modeling of the landslide process. To stabilize the landslide, its body is drained using a surface runoff system and deep drainage. Then the landslide surface is level off or cut into blocks, ground properties are changed. To hold the landslide massif, retaining walls are used. The results of monitoring the development of a landslide in the October gorge of the city of Saratov, which was formed on the left steep side of the gorge between the equipped spring and the 110 kV transmission line, are presented. Its width along the front reaches 200 m, length 150 m, landslide body area 25-30 thousand m2, total weight about 0.5 million tons. The landslide is closely related to the areas of groundwater outlet, including the Oktyabrsky spring. The calculated strength characteristics of soils in the displacement zone were obtained: on contact with calcareous loams, the angle of internal friction is 36°, specific adhesion is 0.05 t/m2; landslide body density 1.62 g/cm3; on contact with clay, respectively, 10°, 2.5 t/m2 and 1.62 g/cm3. Based on them, the stability indices of the landslide slope and landslide pressure for the zone of active landslide deformations are determined. The safety factor for the calculated transections was 0.99-1.0 in the natural state and 1.05-1.43 with design measures; design landslide pressure 45 tf/m. A system of anti-landslide measures is proposed. It includes the installation of retaining structures from bored piles with grillage and retaining wall; slope profiling with the construction of a counter-banquet; the device of the surface drainage system with the discharge of water into the roadside tray; landscaping of slopes by sowing herbs.
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Liu, Shuhao, Samuele Segoni, Federico Raspini, Kunlong Yin, Chao Zhou, Yiyue Zhang, and Nicola Casagli. "Satellite InSAR as a New Tool for the Verification of Landslide Engineering Remedial Works at the Regional Scale: A Case Study in the Three Gorges Resevoir Area, China." Applied Sciences 10, no. 18 (September 16, 2020): 6435. http://dx.doi.org/10.3390/app10186435.
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Several countries worldwide are funding large-scale programs to mitigate landslide risk by implementing engineering remedial works. However, the overall effectiveness of such measures is rarely monitored, and they are typically performed at the slope scale without fully exploiting the wide-area capabilities of remote sensing technologies. A multi-scale and multi-source monitoring procedure for evaluating the slope stability and the effectiveness of related remedial works was proposed in this study and applied in the middle section of the Three Gorges Reservoir Area (TGRA), China. The area is highly exposed to landslide hazards, and a massive program of engineering remedial works was recently implemented. Satellite interferometric synthetic aperture radar (InSAR)-based techniques were first exploited at the regional scale with the objective to provide a general overview of the deformative scenario and to highlight localized problems (active landslides or high deformation zones) to be further investigated; then, local-scale field investigation and multi-source ground monitoring data were employed to verify the deforming states of active landslides and to evaluate the effectiveness of the landslide engineering remedial works. The results indicated that, among the 310 mapped landslides in the study area, 52 were identified to be active and in a slow-moving state by satellite InSAR; Among the 58 controlled landslides, 9 of them were suspected to be active in a slow-moving state and require further concern. Particular attention was paid to two controlled landslides that were found in a continuously and progressively deforming state. We observed that the regional-scale program of slope stabilization was highly successful; however, the variation of the surrounding environmental setting could have led to landslide reactivation or partial invalidation of the landslide remedial works. The proposed multi-scale and multi-source monitoring framework is low-cost, easy to perform, and very straightforward to communicate to citizens and authorities. It can be easily implemented with very wide areas to assess the slope stability and to investigate the effectiveness of large-scale governmental risk mitigation programs, identifying precursor signals that could allow for intervention before reaching critical conditions.
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Alexiew, Dimiter, Anton Plankel, and Graham Thomson. "A geogrid-reinforced landslide stabilization: 20 years passed." Japanese Geotechnical Society Special Publication 2, no. 30 (2016): 1094–98. http://dx.doi.org/10.3208/jgssp.oth-18.
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Singh, Ashish Kumar. "Bioengineering techniques of slope stabilization and landslide mitigation." Disaster Prevention and Management: An International Journal 19, no. 3 (June 22, 2010): 384–97. http://dx.doi.org/10.1108/09653561011052547.
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Naithani, Ajay K., and P. C. Nawani. "Landslide hazard zonation mapping of Tapovan - Helong hydropower project area, Garhwal Himalaya, India, using univariate statistical analysis." Journal of Nepal Geological Society 39 (September 25, 2009): 59–76. http://dx.doi.org/10.3126/jngs.v39i0.31488.
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Landslide hazard zonation mapping of Tapovan - Helong area of Garhwal Himalaya, where a hydropower scheme of 520 MW is proposed on Dhauli Ganga was carried out. The study area lies in the Main Central Thrust (MCT) zone, which receives majority of the southwest summer Monsoon. The study area belongs to Central Crystalline zone consisting of medium to high grade-quartz-plagioclase-muscovite-biotite-garnet-kyanite and sillimanite bearing crystalline rocks. In the present study statistical analysis of various geo-environmental factors such as the lithology, slope, structure, relative relief, landuse and hydro-geological conditions were used. For preparing the landslide hazard zonation map a quantitative approach called landslide hazard evaluation factors (LHEF) rating has been used. The study indicates that structures, peri-glacial material resting on steeper angle of hill slopes and rainfall plays major role in triggering landslides in this part of the Himalaya. The main aim of this study was to select the best locations for the construction of barrage and sedimentation tank, selections of sites for the tunnels portal and the switchyard area and finally appropriate slope stabilization measures were also suggested. The study further suggests that in the investigation stage for river valley projects, landslide hazard evaluation factor (LHEF) rating scheme can provide rapid hazard assessment in a mountainous terrain.
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Bardel, Tomasz. "Landslides stabilization - optimise solutions or maximize costs - case study." Science, Technology and Innovation 3, no. 2 (December 5, 2018): 1–8. http://dx.doi.org/10.5604/01.3001.0012.7714.
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The stabilization of landslide is usually very costly, which is why optimal slope reinforcement should be based on exact geological investigations. The described case of a small landslide on the road in the Carpathians presents the process of documenting, stability analysis and design solutions for slope reinforcement. Depth of slip surface was the most important information for slope reinforcement first-design. Collapsed slope was subjected to re-analysis of stability, taking into account additional data already obtained during slope reinforcement. Stability modeling results indicate a different range and depth of the slip surface than those use for design, which had a major impact on the costs of stabilization.
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Li, Songlin, Qiang Xu, Minggao Tang, Huajin Li, He Yang, and Yong Wei. "Centrifuge Modeling and the Analysis of Ancient Landslides Subjected to Reservoir Water Level Fluctuation." Sustainability 12, no. 5 (March 9, 2020): 2092. http://dx.doi.org/10.3390/su12052092.
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Landslides are among the most severe natural hazards with significant impacts in human life and infrastructure. The Three Gorges Reservoir Area (TGRA) is vulnerable to landslides because of the geological environment and human activities. A centrifuge model test of a landslide with a planar sliding surface in the TGRA was conducted. Based on the multiple monitoring systems composed of a 3D laser scanner, pore water pressure transducers, particle image velocimetry and earth pressure sensors, multiphysical data were obtained. The work described here had the objective of researching the long-term deformation pattern of this kind of landslide that was subjected to periodic fluctuations in the reservoir water level. The results indicated that the failure processes were characterized by progressive retrogression and cracks caused by the reservoir drawdown. Transverse tensile cracks first appeared in the submerged zone of the slope. The front part of the slope was dominated by horizontal displacement, while the consolidation and compaction deformation in the vertical direction dominated at the mid-rear part of the slope. When the water level dropped again, the front part slid down and fell into the river, but the mid-rear part had no obvious deformation and exhibited a phenomenon of self-stabilization. Moreover, the phreatic line is a concave shape directed into the slope during reservoir filling and converts to a convex shape pointing out of the slope during reservoir drawdown. The earth pressures in the slope vary with the failure process of the landslide. Good agreement is obtained for the deformation characteristics between the experimental results and those of prototype landslides.
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Cotecchia, Federica, Rossella Petti, Dario Milella, and Piernicola Lollino. "Design of Medium Depth Drainage Trench Systems for the Mitigation of Deep Landsliding." Geosciences 10, no. 5 (May 10, 2020): 174. http://dx.doi.org/10.3390/geosciences10050174.
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For those slopes where the piezometric regime acts as internal landslide predisposing factor, drainage may represent a more effective mitigation measure than other structural interventions. However, drainage trenches have been generally considered as mitigation measure solely for shallow landslides. More recently, instead, some authors show that the variation in piezometric conditions at large depth is not negligible when medium depth drainage trenches are involved. The paper presents the results of finite element analyses of the transient seepage induced by the installation of systems of drainage trenches of different geometric parameters, and the effect of the drainage system on the stability factor of the slip surface, through 2D limit equilibrium analyses. The pilot region is the Daunia Apennines, where field studies have led to recognize for most of the landslides a “bowl-shaped” slip surface; the results accounting for the Fontana Monte slope at Volturino (Italy), selected as prototype landslide in the assessment of the stabilization efficacy of deep drainage trench systems, is discussed in the following. The study aims at providing indications about the design of the drainage trenches to reduce the pore water pressures on a deep slip surface of such type.
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Tang, Lin, Xiao Wu Tang, and Wei Liu. "A Case Study of Effect of Horizontal Drains on Rainfall-Induced Landslide." Advanced Materials Research 250-253 (May 2011): 1834–37. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.1834.
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Rainfall-induced landslides are of frequent occurrence in the south of China. One of the most effective methods to stabilize landslides is to lower the groundwater table by installing horizontal drain. A shallow landslide caused by typhoon Morakot happened along Shangyu - Sanmen Expressway in Zhejiang. Horizontal drains were installed and served as an important part of the slope stabilization scheme. The relationship among rainfall intensity, groundwater level, and slope stability was indicated by field monitoring data. Using software GeoStudio, the stability states of the original slope under rainfall are simulated, based on Fredlund’s Unsaturated Soil Strength Theory. After the rain ceases, the draining processes of the original slope and the slope with horizontal drains are compared. It is obvious that the factor of safety recovers rapidly in the slope with drains. The simulated discharge rate of drain and slope surface, and the change of groundwater table also prove the benefits of the drains, which agree well with the field monitoring data.
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Black, Brent A., George Machan, and Michael Poelma. "Horizontal Drains in a Clay–Landslide Stabilization Test Program." Transportation Research Record: Journal of the Transportation Research Board 2116, no. 1 (January 2009): 35–40. http://dx.doi.org/10.3141/2116-05.
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Frangov, Georgi, and Margarita Hamova. "Landslide Stabilization on a Mountain Road in North Bulgaria." IABSE Symposium Report 90, no. 6 (January 1, 2005): 29–34. http://dx.doi.org/10.2749/222137805796271071.
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Bartz, James R., C. Derek Martin, and Michael T. Hendry. "Design procedure for landslide stabilization using sheet pile ribs." Canadian Geotechnical Journal 56, no. 4 (April 2019): 514–25. http://dx.doi.org/10.1139/cgj-2018-0082.
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A design procedure was developed for a relatively unknown slope stabilization technique consisting of a series of parallel sheet piles installed parallel to the direction of slope movement. This technique was introduced in Alberta by R.M. Hardy in the 1970s and is locally referred to as “Hardy Ribs.” A case study is discussed where Canadian National (CN) Rail installed Hardy Ribs to stabilize a landslide affecting its rail line in western Manitoba. A proposed design procedure is discussed that consists of a de-coupled approach with a separate limit equilibrium slope stability analysis and laterally loaded pile analysis using p–y curves, where p is the soil reaction per unit length and y is the lateral deflection of the pile, to model the soil–pile interaction. Example calculations are provided for the proposed design procedure for the CN case study site to illustrate its use and to estimate the stabilizing effect from the Hardy Ribs at this site.
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Ukleja, Janusz. "Stabilization of Landslides Sliding Layer Using Electrokinetic Phenomena and Vacuum Treatment." Geosciences 10, no. 8 (July 25, 2020): 284. http://dx.doi.org/10.3390/geosciences10080284.
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The article presents the efficiency of application of cohesive soil dewatering for increasing its resistance to shearing, which influences the mass stability of flysch rock. Studies of the typical soil constituting the contact layer initiating the sliding of existing Carpathian flysch landslides were conducted. This aspect was examined because the water content of this soil decides its ability to form a sliding surface of the landslide block soil. The soil was subjected to changes in water content by dewatering with different methods. The influence of dewatering by self-acting gravitational outflow was examined and was additionally aided by two selected methods: electrokinetic phenomena and vacuum treatment. The model study conducted demonstrates the influence of the abovementioned dewatering methods on increasing the strength parameter of the soil at the contact layer in which sliding surfaces can be created. The paper also demonstrates the degree to which the application of the vacuum and electrokinetic treatment caused by DC current voltage influences the draining, decrease of plasticity, and increase of soil shear stress resistance. The application conditions and increase in effectiveness due to the application of the studied methods were determined. The proposed methods allowed for the strengthening of slopes for two exemplary landslides which formed in the area of occurrence of the Carpathian flysch.
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Lee, Edward Mark, and David Peter Giles. "Chapter 4 Landslide and slope stability hazard in the UK." Geological Society, London, Engineering Geology Special Publications 29, no. 1 (2020): 81–162. http://dx.doi.org/10.1144/egsp29.4.
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AbstractWith its rich lithological variation, upland, lowland and coastal settings, and past climatic changes, the UK presents a wide variety of landslide features that can pose significant hazards to people, construction and infrastructure, or simply add to landscape character and conservation value of an area. This chapter describes and defines the nature and extent of this landsliding; the causes, effects and geological controls on failure; and their mitigation and stabilization. A risk-based approach to landslide management is outlined with qualitative and semi-quantitative methodologies described. Numerous case studies are presented exemplifying landslide and slope stability hazards in the UK.
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Roslee, Rodeano, Ahmad Nazrul Madri, and Mohd Fauzi Zikiri. "LANDSLIDE VULNERABILITY ASSESMENT (LVAs) IN LUYANG AREA, KOTA KINABALU, SABAH, MALAYSIA." Environment & Ecosystem Science 4, no. 2 (November 12, 2020): 100–104. http://dx.doi.org/10.26480/ees.02.2020.100.104.
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Landslide issues in Malaysia is successfully attract the interest and attention of stakeholders and the community of scientists to reduce the risk. Landslides are influenced by many factors that range from the intensity, duration and extent of a triggering factor (e.g. earthquake and rainfall) to the local physical conditions such as landform, morphological, geological materials and structures, hydrological and land uses. In this paper, we present the results of the Landslide Vulnerability Assessment (LVAs). Vulnerability is defined as the degree of losses of a given element at risk of being exposed to the occurrence of a landslides of a given magnitude or intensity, and often expressed on a scale of 0 (no loss) to 1 (total loss). The selection of the best LVAs depends on the exposed elements, landslide types and the scale of analysis. The concept of LVAs also refers to the feasibility of elements at risks on engineering structures, infrastructure facilities, communication systems, commercial (including insurance disclosures) and social. The vulnerability parameters include in assessing LVAs in this study are 1) physical implication (building structures, internal materials, property damage, infrastructural facilities and stabilization actions), social status (injury, fatalities, safety, loss of accommodation and public awareness) and interference on environment (affected period, daily operation & diversity). LVAs for study area produced by combining or overlaid of all Physical Vulnerability (Vp), Social Vulnerability (Vs) and Environmental Vulnerability (Ve) maps. The results for the Total of LVAs indicates that 30% (0.90 sq.m) of the study area classified as Very Low, 8% (0.24 sq.m) as Low, 8% (0.24 sq.m) as Moderate, 28% (0.84 sq.m) as High, 8% (0.24 sq.m) as Very High and 18% (0.54 sq.m) as Extremely High. Landslide Vulnerability level at a “high” to “very high” degree can leave an impact on individuals and society. This study found that residential, commercial, public and industrial infrastructure has higher vulnerability rather than the agricultural and forestry areas. This LVAs approach is suitable as a guideline for preliminary development planning, control and manage the landslide hazard / risk in the study area and potentially to be extended with different background environments.
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Bernardie, Séverine, Rosalie Vandromme, Yannick Thiery, Thomas Houet, Marine Grémont, Florian Masson, Gilles Grandjean, and Isabelle Bouroullec. "Modelling landslide hazards under global changes: the case of a Pyrenean valley." Natural Hazards and Earth System Sciences 21, no. 1 (January 18, 2021): 147–69. http://dx.doi.org/10.5194/nhess-21-147-2021.
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Abstract. Several studies have shown that global changes have important impacts in mountainous areas, since they affect natural hazards induced by hydrometeorological events such as landslides. The present study evaluates, through an innovative method, the influence of both vegetation cover and climate change on landslide hazards in a Pyrenean valley from the present to 2100. We first focused on assessing future land use and land cover changes through the construction of four prospective socioeconomic scenarios and their projection to 2040 and 2100. Secondly, climate change parameters were used to extract the water saturation of the uppermost layers, according to two greenhouse gas emission scenarios. The impacts of land cover and climate change based on these scenarios were then used to modulate the hydromechanical model to compute the factor of safety (FoS) and the hazard levels over the considered area. The results demonstrate the influence of land cover on slope stability through the presence and type of forest. The resulting changes are statistically significant but small and dependent on future land cover linked to the socioeconomic scenarios. In particular, a reduction in human activity results in an increase in slope stability; in contrast, an increase in anthropic activity leads to an opposite evolution in the region, with some reduction in slope stability. Climate change may also have a significant impact in some areas because of the increase in the soil water content; the results indicate a reduction in the FoS in a large part of the study area, depending on the landslide type considered. Therefore, even if future forest growth leads to slope stabilization, the evolution of the groundwater conditions will lead to destabilization. The increasing rate of areas prone to landslides is higher for the shallow landslide type than for the deep landslide type. Interestingly, the evolution of extreme events is related to the frequency of the highest water filling ratio. The results indicate that the occurrences of landslide hazards in the near future (2021–2050 period, scenario RCP8.5) and far future (2071–2100 period, scenario RCP8.5) are expected to increase by factors of 1.5 and 4, respectively.
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Santi, Paul M., C. Dale Elifrits, and James A. Liljegren. "Design and Installation of Horizontal Wick Drains for Landslide Stabilization." Transportation Research Record: Journal of the Transportation Research Board 1757, no. 1 (January 2001): 58–66. http://dx.doi.org/10.3141/1757-07.
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Suits, L. D., T. C. Sheahan, and V. Fioravante. "Physical Modeling of Landslide Stabilization Methods in an Overconsolidated Clay." Geotechnical Testing Journal 31, no. 2 (2008): 100001. http://dx.doi.org/10.1520/gtj100001.
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Emeka, Okoli Jude, Haslinda Nahazanan, Bahareh Kalantar, Zailani Khuzaimah, and Ojogbane Success Sani. "Evaluation of the Effect of Hydroseeded Vegetation for Slope Reinforcement." Land 10, no. 10 (September 22, 2021): 995. http://dx.doi.org/10.3390/land10100995.
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A landslide is a significant environmental hazard that results in an enormous loss of lives and properties. Studies have revealed that rainfall, soil characteristics, and human errors, such as deforestation, are the leading causes of landslides, reducing soil water infiltration and increasing the water runoff of a slope. This paper introduces vegetation establishment as a low-cost, practical measure for slope reinforcement through the ground cover and the root of the vegetation. This study reveals the level of complexity of the terrain with regards to the evaluation of high and low stability areas and has produced a landslide susceptibility map. For this purpose, 12 conditioning factors, namely slope, aspect, elevation, curvature, hill shade, stream power index (SPI), topographic wetness index (TWI), terrain roughness index (TRI), distances to roads, distance to lakes, distance to trees, and build-up, were used through the analytic hierarchy process (AHP) model to produce landslide susceptibility map. Receiver operating characteristics (ROC) was used for validation of the results. The area under the curve (AUC) values obtained from the ROC method for the AHP model was 0.865. Four seed samples, namely ryegrass, rye corn, signal grass, and couch, were hydroseeded to determine the vegetation root and ground cover’s effectiveness on stabilization and reinforcement on a high-risk susceptible 65° slope between August and December 2020. The observed monthly vegetation root of couch grass gave the most acceptable result. With a spreading and creeping vegetation ground cover characteristic, ryegrass showed the most acceptable monthly result for vegetation ground cover effectiveness. The findings suggest that the selection of couch species over other species is justified based on landslide control benefits.
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Bozo, Luljeta, and Kujtim Cela. "Problems with Landslide Stabilization of Dukat in the Road Vlora – Saranda." Procedia Engineering 143 (2016): 1435–42. http://dx.doi.org/10.1016/j.proeng.2016.06.169.
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Omar, RC, INZ Baharuddin, Hairin Taha, R. Roslan, Hazwani NK, and Muzad MF. "Slope Stability Analysis of Granitic Residual Soil Using SLOPE/W, Resistivity and Seismic." International Journal of Engineering & Technology 7, no. 4.35 (November 30, 2018): 172. http://dx.doi.org/10.14419/ijet.v7i4.28.22355.
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There are many factors that influence slope failure such as natural disasters and human activities. Amongst the major causes are the rise of groundwater and infiltration of prolonged and antecedent rainfalls. Together with its geographical condition; high lands and mountains, Malaysia is prone to have landslides especially at the Main Range area where most of the soil is residual soil. This study investigated a slope which had a history of landslide due to circular failure landslide using Slope/W, resistivity and seismic surveys to determine the physical and mechanical properties of the on-site materials. Based on the resistivity survey, the existence of groundwater level has been detected at a depth of 10.0 m from the ground level. Seismic analysis showed that the subsurface area was made up of Weathered Granite Grade VI (sandy soil) which is loose to medium dense. SLOPE/W analysis showed that the factor of safety (FOS) was 0.186 which was unstable for slope stability condition. The assessment showed that the slope condition is still not stable despite slope stabilization measurement using cement grouting. It is proposed that erosion control measures on the slope surface should be implemented to prevent recurrent of slope failure and to ensure slope stability.
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Zabuski, Lesław, Giulia Bossi, and Gianluca Marcato. "Influence of the Geometry Alteration of the Landslide Slope on its Stability: A Case Study in the Carnian Alps (Italy)." Archives of Hydro-Engineering and Environmental Mechanics 64, no. 2 (December 1, 2017): 101–14. http://dx.doi.org/10.1515/heem-2017-0007.
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Abstract The paper presents the principles of the slope reprofiling and proves the effectiveness of this stabilization measure. The case study of two adjacent landslides in the National Road 52 “Carnica” in the Tagliamento River valley, the Carnian Alps (46°23′49″N, 12°42′51″E) are the example allowing for illustration of this approach. The phenomena have been studied for more than a decade, making it possible to carry out a detailed geological and geomorphological reconstruction. That was done on the basis of a large amount of monitoring data collected during that period. Since the landslides are threatening an important road, countermeasure works to ameliorate the stability conditions of the slides need to be designed. The paper focuses on the creation of a numerical model consistent with monitoring data and capable of reconstructing the dynamics of both landslides. Two cross-sections, one for each landslide, were selected for the analysis. The geometry of the slip surface was determined on the basis of control points, such as slip surface readings from inclinometers, and geomorphological evidence for the contour. The FLAC2D code was used to evaluate the current stability of these landslides and to determine the effectiveness of changing the slope geometry by removing material from the upper part of the slope and putting it to the lowest part as reinforcement.
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Mourtzas, N. D., and E. Sotiropoulos. "Palaeotectonic environment and landslide phenomena in the area of Malakasa, Greece." Bulletin of the Geological Society of Greece 47, no. 4 (September 5, 2013): 1805. http://dx.doi.org/10.12681/bgsg.11060.
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The extended landslide of Malakasa area, located 35km to the North of Athens, occurred in a neopalaeozoic schist-sandstone klippe, a complex Palaeotectonic environment in the northern roots of Parnitha Mt. Due to this failure, railway line and highway connection between Athens and central and North Greece were cut off. In this paper, it is attempted to approach the landslide mechanism based on: (i) the kinematic data on the failure surface, (ii) the morphological features of the surface, (iii) the movement vectors, and (iv) the lithostratigraphy and hydro-geological features of the sliding mass. According to the above criteria, three soil blocks can be identified in the landslide mass, which are differentiated by their lithological structure, kinematic features, type of deformation and hydro-geological behavior. The causal factor of the extended landslide was the gradual loss of support of these three blocks and their slide on a pre-sheared surface of low strength that has been caused by the extended excavation in the slope toe. The palaeotectonic structure and the development and geometry of the geological formations in the landslide area were not taken into account during the construction of the drainage works, for slope stabilization and the increasing of safety factor, something which led to the over-designing of the remedial measures.
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PLANKEL, Anton, and Dimiter ALEXIEW. "Landslide stabilization with geogrids in Lech: a pioneer project 25 years ago." ce/papers 2, no. 2-3 (June 2018): 493–98. http://dx.doi.org/10.1002/cepa.719.
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Turner, John P., and Wayne G. Jensen. "Landslide Stabilization Using Soil Nail and Mechanically Stabilized Earth Walls: Case Study." Journal of Geotechnical and Geoenvironmental Engineering 131, no. 2 (February 2005): 141–50. http://dx.doi.org/10.1061/(asce)1090-0241(2005)131:2(141).
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Guemache, Mehdi A., Jean-Luc Chatelain, Djamel Machane, Sihem Benahmed, and Leila Djadia. "Failure of landslide stabilization measures: The Sidi Rached viaduct case (Constantine, Algeria)." Journal of African Earth Sciences 59, no. 4-5 (March 2011): 349–58. http://dx.doi.org/10.1016/j.jafrearsci.2011.01.005.
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Brambilla, Mattia. "The impact of landslide stabilization on birds: Insights from an Alpine valley." Ecological Engineering 147 (March 2020): 105766. http://dx.doi.org/10.1016/j.ecoleng.2020.105766.
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Deng, J. H., L. G. Tham, C. F. Lee, and Z. Y. Yang. "Three-dimensional stability evaluation of a preexisting landslide with multiple sliding directions by the strength-reduction technique." Canadian Geotechnical Journal 44, no. 3 (March 1, 2007): 343–54. http://dx.doi.org/10.1139/t06-115.
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Landslide 1 is located on the right bank of the downstream side of the dam for Hongjiadu Hydropower Station in Guizhou Province, China. In view of its close proximity to important workings, the stability of the slide is of great concern. Ground investigation showed that the slide is potentially unstable and has two sliding directions. Reinforcement mainly by piles was proposed as the stabilization measure, but two key questions were raised during the design of the piles. (1) How could the stability of the slope be evaluated, as there are two major sliding directions? (2) How could the shear strength parameters of the slip band be determined, as it contains a significant proportion of coarse particles? In this paper, we demonstrate how these issues can be addressed by the strength-reduction technique. First, the strength parameters of the slip band are back-analyzed by assuming a factor of safety of unity. Second, the major sliding directions are determined by carrying out finite difference analyses. Third, two proposed stabilization schemes are evaluated and compared to demonstrate the versatility of the technique. The present study has demonstrated that the strength-reduction technique is a powerful tool for analyzing such problems.Key words: landslide, reinforcement, piles, stability evaluation, strength-reduction technique.
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Matti, Boris, Laurent Tacher, and Stephane Commend. "Modelling the efficiency of a drainage gallery work for a large landslide with respect to hydrogeological heterogeneity." Canadian Geotechnical Journal 49, no. 8 (August 2012): 968–85. http://dx.doi.org/10.1139/t2012-061.
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This study describes transient hydrogeological and geomechanical models realized jointly in 2006 by the Geolep office (Géologie de l’Ecole Polytechnique) of the Polytechnical School of Lausanne (EPFL) and GeoMod SA within the framework of the stabilization work of the La Frasse landslide (Vaud, Switzerland). These models evaluate the impact of a deep drainage gallery with subvertical drainage boreholes towards the surface in terms of reduction of the deformation velocities and increase of the landslide’s factor of safety. The paper presents the effect of different pipe spacing of the drainage system. Considering the local heterogeneities, the results show that a mean spacing between the drainage boreholes of the order of 10 m is sufficient to control the temporal head fluctuations between the wells within a range of a few metres. Moreover, this solution induces a strong diminution of the predicted displacements during a specific crisis, from 101 cm for the model without drainage to around 14 cm for the drained model, and a significant gain of stability (from a factor of safety (FoS) of 1.05 to 1.30).
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Michalski, Andrzej. "Slope stability analysis with geo 5 software for “Łaski” Landslide in Międzybrodzie Bialskie." Contemporary Trends in Geoscience 2, no. 1 (September 1, 2013): 34–40. http://dx.doi.org/10.2478/ctg-2014-0005.
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Abstract Abstract. Numerical modeling is an important tool to estimate slope stability. This publication shows application of a GEO 5 - slope stability software to evaluate stability of the “Łaski” Landslide in Międzybrodzie Bialskie. The slide surfaces, which were indentified in drill cores, were used to compute factors of safety (FS). The data from inclinometric measurements were used to verify the numerical model of the landslide. Calculations were carried out for three scenarios: first with normal water level, second scenario with lowered water level of 5 m and 10 m and the third scenario without water with the worst courses of sliding surfaces. As the result for each scenario the factors of safety were estimated. It was found that despite of water lowering and stabilization of existed surfaces, there is a considerable risk of a new sliding surfaces occurrence.