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Journal articles on the topic 'Complex geotechnical conditions'
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1
Elmouttie, Marc, Jane Hodgkinson, and Peter Dean. "Prediction of Mining Conditions in Geotechnically Complex Sites." Mining 1, no. 3 (2021): 279–96. http://dx.doi.org/10.3390/mining1030018.
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Geotechnical complexity in mining often leads to geotechnical uncertainty which impacts both safety and productivity. However, as mining progresses, particularly for strip mining operations, a body of knowledge is acquired which reduces this uncertainty and can potentially be used by mining engineers to improve the prediction of future mining conditions. In this paper, we describe a new method to support this approach based on modelling and neural networks. A high-level causal model of the mining operations based on historical data for a number of parameters was constructed which accounted for parameter interactions, including hydrogeological conditions, weather, and prior operations. An artificial neural network was then trained on this historical data, including production data. The network can then be used to predict future production based on presently observed mining conditions as mining proceeds and compared with the model predictions. Agreement with the predictions indicates confidence that the neural network predictions are properly supported by the newly available data. The efficacy of this approach is demonstrated using semi-synthetic data based on an actual mine.
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Xiaolei, Yin. "Case study of geotechnical engineering investigation under complex geological conditions." Advance in Civil Engineering 2, no. 1 (2020): 26–31. http://dx.doi.org/10.35534/ace.0201005c.
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Benin, Andrey V., and Elena V. Gorodnova. "Geotechnical Analysis of Structural Behaviour Under Complex Geological Engineering Conditions." Procedia Engineering 189 (2017): 65–69. http://dx.doi.org/10.1016/j.proeng.2017.05.011.
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Zotsenko, M. L., Yu L. Vynnykov, М. O. Kharchenko, and І. I. Lartseva. "DESIGN PECULIARITIES OF OIL STORAGE TANKS IN COMPLEX GEOTECHNICAL CONDITIONS AT SEISMIC EFFECTS." ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 1, no. 48 (2017): 175–82. http://dx.doi.org/10.26906/znp.2017.48.795.
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Problematic issues of construction and operation of oil storage vertical steel tanks in complex geotechnical conditions, including the seismically unstable territories are systematized. The technique of seismic danger decreasing (increasing the seismic stability of the ground) for ensuring the accident-free operation of tanks during earthquakes of various intensities is proved.
 The practical experience of design solutions of the highly effective systems «man-made grounds – foundation – tank» in complex geotechnical conditions for static and dynamic effects (earthquakes, emergency technogenic loadings, etc.) is given.
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Gao, Yan, Guihe Liang, and Yanyong Zhou. "Exploration of Geotechnical Engineering Investigation under Complex Topographical and Geological Conditions." Frontiers Research of Architecture and Engineering 2, no. 4 (2019): 20. http://dx.doi.org/10.30564/frae.v2i4.1512.
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This paper will explore the geotechnical engineering investigation technology under the complex topographical and geological conditions, and introduce how to construct the water supply tube wells faster and better under the complex topographical and geological conditions by taking Inner Mongolia as an example, so as to provide reference for the relevant professionals
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MULABDIĆ, Mensur, Krunoslav MINAŽEK, Marija LEKO-KOS, Želimir ORTOLAN, Jelena KALUÐER, and Jelena MATIJEVIĆ. "A case of complex geotechnical conditions for a water treatment facility." ce/papers 2, no. 2-3 (2018): 719–24. http://dx.doi.org/10.1002/cepa.755.
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Vinod, J. S. "Dem Simulations in Geotechnical Earthquake Engineering Education." International Journal of Geotechnical Earthquake Engineering 1, no. 1 (2010): 61–69. http://dx.doi.org/10.4018/jgee.2010090804.
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Behaviour of geotechnical material is very complex. Most of the theoretical frame work to understand the behaviour of geotechnical materials under different loading conditions depends on the strong background of the basic civil engineering subjects and advanced mathematics. However, it is fact that the complete behaviour of geotechnical material cannot be traced within theoretical framework. Recently, computational models based on Finite Element Method (FEM) are used to understand the behaviour of geotechnical problems. FEM models are quite complex and is of little interest to undergraduate students. A simple computational tool developed using Discrete Element Method (DEM) to simulate the laboratory experiments will be cutting edge research for geotechnical earthquake engineering education. This article summarizes the potential of DEM to simulate the cyclic triaxial behaviour of granular materials under complex loading conditions. It is shown that DEM is capable of simulating the cyclic behavior of granular materials (e.g. undrained, liquefaction and post liquefaction) similar to the laboratory experiments.
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Yu, Wei Wei, and Xuan Guo. "Ground Adaptability Characterization for Digging in Complex Geotechnical Conditions and Risk Mitigation." Advanced Materials Research 415-417 (December 2011): 1431–34. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.1431.
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Characterization of geotechnical digging and control the dynamical settlement is very necessary to mitigate construction risk. The metro tunnels of being constructed access to each other or near to the ground is high risk and physically difficult and costly. The control method becomes imperative. Some cases of digging prediction of ground movements and assessment of risk of damage to above or adjacent constructions have become an important issue especially in urban projec. Ground adaptability characterization is the key of control the tunneling in complex geotechnical conditions both in rock and soft stratum. High and changed water-soil pressure also is risk factors to effect tunneling process. Beside discussion of risk mitigation associate to tunnel construction, the developing settlement control and simulations are given to describe the methods of control risk.
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Wang, Ge. "Research on the Method of Ground Stress Balance under Complex Conditions Based on Geometric Tracing." Advances in Civil Engineering 2022 (May 14, 2022): 1–8. http://dx.doi.org/10.1155/2022/9359268.
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The accuracy of the initial ground stress balance determines the accuracy of the finite element analysis of geotechnical problems. The traditional ground stress balance method has a good balance effect for simple geotechnical models but has strong limitations when the structure and soil interact with each other, the geometry of the model is complex, or the constraints are complicated. To deal with such problems, this paper proposes a general ground stress balance method based on geometric tracing by iteratively superimposing the static displacement field of the numerical model with the initial node coordinates of the numerical model. Two commonly used methods as well as the proposed method were tested with a model which contains both soil elements and structural elements and a case study. Test results show that the proposed method is capable of dealing with a complex model in which the commonly used methods fail to. Furthermore, the proposed ground stress balance method was demonstrated to be clear and has rapid convergence and high accuracy for complex stratum-structure geotechnical problems.
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Ivkovic, Mirko, and Mile Bugarin. "Technical solution of supporting the mining facilities in the complex geotechnical conditions." Rudarski radovi, Bor, no. 3 (2012): 287–94. http://dx.doi.org/10.5937/rudrad1203287i.
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Strizhelchik, Genadiy, Viacheslav Iegupov, and Iryna Khrapatova. "Ensuring urban resilience construction in difficult engineering and geological conditions (geotechnical view)." IOP Conference Series: Earth and Environmental Science 1499, no. 1 (2025): 012048. https://doi.org/10.1088/1755-1315/1499/1/012048.
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Abstract The aim of our current research, reflected in this article, is to come closer to creating a harmonious and sustainable system “urban resident - environment”, in this case from a geotechnical point of view. For this purpose, the concept of the sustainability resource of natural and man-made geotechnical systems can be applied. The resource of sustainability of complex natural systems to external influences means the ability of the system to maintain its appearance and basic functional features, despite these influences (Iegupov & Strizhelchik, 2021). This applies to both the natural conditions of a specific territory and complex systems, for example, the system “man - engineering and geological environment of the city”. This concept is considered to have possibilities and prospects for predicting the impact and consequences of construction on natural and engineering-geological conditions in urban areas. Several types of uncertainty arising in predicting changes in engineering and geological conditions are identified: natural uncertainty, strategic, methodological, conceptual, temporal, and parametric. Some ways of solving the emerging problems of forecasting changes in engineering-geological conditions in urban areas are proposed, in particular, ways of reducing specific types of uncertainty. A general forecasting scheme for geotechnical engineering is presented.
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KULIKOVA, Elena, Sergey BALOVTSEV, and Olga SKOPINTSEVA. "Complex estimation of geotechnical risks in mine and underground construction." Sustainable Development of Mountain Territories 15, no. 1 (2023): 7–16. http://dx.doi.org/10.21177/1998-4502-2023-15-1-7-16.
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Introduction. Projects for the construction of underground structures and mines often involve significant geotechnical risks. The uncertainty associated with geotechnical conditions implies the development of a specific approach to making design and constructive decisions. Even after a thorough geotechnical study, the ability to accurately predict the behavior of adjacent rock massif is often difficult due to the large number of engineering-geological and hydro-geological variables. Most of the identified risks can be eliminated at the design stage. Residual risks should be subjected to a comprehensive assessment, including qualitative and quantitative analysis and calculations of damage from potential risk and technical and economic efficiency of the adopted design decision. Objective. Complex estimation of geotechnical risks in mine and underground construction based on the analysis of indicators of the implementation of accidents by mining-geological and mining-technical factors, taking into account the use of special methods of construction. Methodology. A сomplex estimation of geotechnical risks was carried out on the basis of the theory of emergency risk using methods of mathematical statistics, probability theory; the method of expert assessments to obtain the values of vulnerability coefficients of the applied technologies of mine and underground construction. The developed methodology includes several stages. At the first stage of a сomplex risk estimation, it is necessary to rank the geotechnical risk factors selected for analysis, for which a concordance coefficient is introduced. When analyzing each of the emerging geotechnical figures during the construction of a specific underground or mine construction facility, one of the defining indicators is the numerical expression of the potential damage from the occurrence of an emergency situation, which represents the percentage ratio of the excess of the construction period in real practice to the same indicator laid down in the project, or the ratio of the increase in the cost of construction to the estimated cost. Next, the numerical value of each type of risk is determined and a scale of numerical values of risks is compiled, on the basis of which decisions are made on the management of each specific risk. At the end, the vulnerability of a mine or underground construction facility under construction is determined, i.e. the degree of its possible damage and destruction when exposed to abnormal situations of a natural and man-made nature. Results and discussion. A methodology has been developed for the сomplex estimation of geotechnical risk in mine and underground construction based on the ranking of risks according to the degree of vulnerability of the technologies used. Ranking of construction objects by their vulnerability to various impacts allows us to assess the correlation between the values of the parameters and the qualitative characteristics of the elements of the “mining – rock mass – construction technology” system and the factors that lead to the development of potential damage. In the course of the research, a generalized indicator of the predicted geotechnical risk was identified, which allows taking into account the impact of construction methods on the risk. Since mine workings are currently being built mainly in complex hydro-geological and engineering-geological conditions, the calculation of the generalized indicator focuses on the use of special construction methods, which required the introduction of correction factors to calculate the indicator of the predicted geotechnical risk. The values of correction coefficients for the most used special methods were obtained by the method of expert assessments. Conclusions. One of the important aspects of a сomplex estimation of geotechnical risks in mine and underground construction is to determine the vulnerability of the “mining - rock mass – technology” system. Vulnerability depends on the location of the mine, its cross-section, engineering-geological and hydro-geological conditions, mode of operation, reliability of load-bearing and fencing, etc. By the method of сomplex estimation, vulnerability coefficients of underground structures under construction and mine workings were obtained, as well as correction coefficients taking into account the construction method.
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Kablukov, A. V., T. L. Dmitrieva, and V. P. Yashchenko. "Geotechnical monitoring during the life cycle of fuel and energy complex facilities on permafrost soils." Izvestiya vuzov. Investitsii. Stroitelstvo. Nedvizhimost 15, no. 1 (2025): 73–84. https://doi.org/10.21285/2227-2917-2025-1-73-84.
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The present article considers the specifics of constructing oil and gas production facilities in harsh climatic conditions of permafrost soils. The construction of such facilities sharply intensifies exogenous processes in permafrost soils. Therefore, due to the negative effect of these processes on the safe operation of area and linear objects in oil and gas fields, we substantiate the importance and relevance of geotechnical monitoring as a necessary condition for ensuring the safety of technosphere during the life cycle of objects erected on permafrost soils. A definition of geotechnical monitoring is given in accordance with regulatory documents; a list of governing regulatory documents is provided. The main life cycle stages of permafrost bases and foundations are described indicating the geotechnical monitoring works for each stage. In addition to the types of object state observations during geotechnical monitoring, we consider the principles of analyzing monitoring results and applying compensatory measures. The advantages of geotechnical monitoring automation, as well as the factors hindering its implementation are outlined; the prospects for further geotechnical monitoring development are identified.
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Lapatsin, S. N., M. A. Zhuravkov, and P. S. Piaredryi. "Complex estimation of the underground excavations stability in various mining and geological conditions." Proceedings of the National Academy of Sciences of Belarus. Physical-technical series 69, no. 4 (2025): 340–52. https://doi.org/10.29235/1561-8358-2024-69-4-340-352.
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The paper demonstrates a methodology of a complex stability estimation for underground mining excavations located in salt rock masses. Various geological structures of the rock mass, as well as the most popular safety measures for underground excavations support such as ankers, expansion gaps and reinforced concrete are considered. The proposed methodology is based on a hybrid numerical-analytical method for the determination of the stress-strain state of geotechnical systems as well as on an original complex limit state criterion for rock masses. As the result of the study the main factors influencing the stability of excavations where highlighted and generalized. These factors are: mining depth, mechanical properties of rock mass, its geological structure and safety measures. The degree of the importance of each mentioned factor is established. A number of model problems are solved to prove the efficiency of the proposed method for complete and reliable estimation of rock mass state in the vicinity of underground excavations, as well as predicting the stability of geotechnical structures under various conditions.
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Bredikhin, Vladimir, Vladimir Khaustov, and Dmitriy Melkumov. "Geotechnical monitoring during construction in difficult soil conditions." Journal of Applied Engineering Science 19, no. 2 (2021): 537–41. http://dx.doi.org/10.5937/jaes0-31438.
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One of the common and at the same time most difficult problems that developers may face is unstable soil layer at the base of a future building. This paper describes problems of construction on weak, subsidence and heaving soils in engineering and geological conditions of Kursk city. Real problem of construction property safety is shown with the example of one of the demanding geomorphological and lithological conditions of urban areas. The paper offers a description of geologic and hydrogeological features of the slope rock mass in the right bank of the Tuskar river. Groundwater level lies at 8.7 m. depth. It is possible to predict an increase in the level of groundwater in building maintenance because this area is potentially flooded. Various engineering and geological processes and such phenomena as ground subsidence, Karst, suffosia, landslides, flooding, etc., can also be found in the studied territory. Initially an insufficient engineering-geomorphological, hydrogeological, ecological and engineering-geological study of hazardous areas in the city of Kursk have led to its problematic development, which illustrates the situation with residential real estate in the studied territory. To predict dangerous engineering-geological processes and ensure the reliability of the construction fund, specific proposals have been developed for the organization of a geotechnical monitoring system based on the optimal integration of geomorphological, geodesic, engineering-geological, hydrogeological and environmental construction methods in complex engineering-geological conditions.
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Atkinson, M. S., and G. D. Thornton. "Groundwater Control in Complex Ground Conditions." Geological Society, London, Engineering Geology Special Publications 2, no. 1 (1986): 145–49. http://dx.doi.org/10.1144/gsl.1986.002.01.30.
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AbstractTwo fifteen metre diameter ten metre deep underground tanks were constructed immediately alongside each other by sinking bolted segmental caissons and casting the secondary lining in situ. Preliminary site investigation indicated difficult ground conditions with a high risk of base failure for excavation in the dry. Wet construction of the base slab would avoid base instability but not the problem of hydrostatic uplift of the partially completed structures.Further investigation revealed a complex sequence of interbedded sands, silts and clays of alluvial and glacial origins. The granular horizons comprised a small number of thicker continuous bands, one occurring immediately below the proposed formation levels for the tank floor slabs, and several thinner irregular bands grading laterally into silts and clays.Piezometers in the more critical granular horizons indicated artesian and sub-artesian groundwater levels. Temporarily disconnecting at ground level the piezometer showing artesian conditions and measuring the resulting water flow indicated a granular body of restricted size or limited recharge. The absence of any effect on other piezometers offered confirmation of isolated granular bodies.Despite obvious difficulties in predicting the effectiveness of a groundwater lowering installation the significant advantages of constructing in the dry over wet construction mitigated in favour of dewatering. Sixteen deep pumped wells were installed around the circumference of the tanks to form a figure of eight pattern for the wells. To reduce the risk of a base failure due to artesian groundwater in any lobes of granular material encroaching within the plan excavation but not intersected by the pumped wells, four internal relief wells per tank were installed.Successful construction was achieved, although a minor interruption to the pumping clearly demonstrated the prudence of the internal relief well installation.The paper comments on some aspects of BS 5930 in relation to the construction described.
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Santrač, Petar, and Željko Bajić. "Example of protection of deep foundation pit in complex urban and geotechnical conditions." Gradjevinski materijali i konstrukcije 61, no. 1 (2018): 161–78. http://dx.doi.org/10.5937/grmk1801161s.
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Gabibov, Yu S., and Kh B. Salaeya. "Investigation of individual problems of calculation of drainage pipes in complex geotechnical conditions." Construction and Geotechnics 14, no. 1 (2023): 59–73. http://dx.doi.org/10.15593/2224-9826/2023.1.05.
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The article notes that changes in the loads acting on the drainage pipe (pipeline) in accordance with the relative ability of the drainage pipe and the ground filling to deform are essential. To determine the magnitude of the loads on the drainage pipeline laid in the trench, the formula proposed by A. Marston most accurately corresponds to the results of experiments and is convenient for engineering practice. The perforation of the walls of the drainage pipe affects their strength not only when the pipes are crushed, but also for the conditions of transportation and installation of pipes. The contact interaction of the cross-section of the drainage pipe with the soil base is investigated, in this case, the interaction of cylindrical (having a semicircular contact) or reloid (having a contact of the circle sector) shells lying on an elastic soil base is considered. A differential equation is considered to describe the deformation of an elastic shell, which includes the stiffness parameter, linear differential operators, components of displacement of the neutral axis of the drainage pipe, external load and dimensionless coordinates. For the elastic base models of E.Winkler and V.Z.Vlasov, a general solution of the differential equation describing the deformation of the drainage pipe is proposed. The solution of this equation and the external load is presented in the form of double or single trigonometric series, depending on the task (two-dimensional or one-dimensional). A horizontally lying cylindrical (or reloid) shell (drainage pipe) supported on a ground base is considered. The contact pressure is determined by summing the Fourier coefficients. This solution additionally takes into account the distribution capacity of the ground base of the drainage pipe.
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Ng’eno, Festus, C. Omuto, and E. Biamah. "DEVELOPMENT OF R- CODE FOR ANALYSING GEOTECHNICAL SOIL PROPERTIES." Journal of Engineering in Agriculture and the Environment 9, no. 1 (2023): 1–16. http://dx.doi.org/10.37017/jeae-volume9-no1.2023-1.
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Geotechnical investigations thoroughly and completely define the stratigraphy of the subsurface including complex boundaries. They are particularly useful for practical geotechnical analysis and engineering design. Geotechnical investigations are performed to evaluate those geologic, seismologic and soils conditions that affect the safety, cost effectiveness, design and execution of a proposed engineering project. This study endeavours to develop a low-cost and accessible computer program for use in geotechnical explorations. The R-code was developed in R software helps to solve the problems of high costs, time wastage and improper reporting of geotechnical data. The objective of this study was to develop R - code for dynamic integration of geotechnical investigations and visualization of the output graphically.
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Angelova, Roumyana. "Engineering geological characteristics of Danube right bank between Kozloduy and Gorni Tsibar." Review of the Bulgarian Geological Society 81, no. 2 (2020): 13–25. http://dx.doi.org/10.52215/rev.bgs.2020.81.2.2.
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The geotechnical properties of soils (clays of the Brusarci Formation and loess complex) spread over the area of Danube right bank between the town of Kozloduy and the village of Gorni Tsibar have been determined. Complex landslides and river erosion are the most important geodynamic processes in the study area. Engineering geological zoning has been carried out, with two separated zones. The second zone is characterized with most complicated geotechnical conditions due to distribution of both old landslides and recently landslide activation in some sub-zones.
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Sokolov, Nikolai S. "Ground Ancher Produced by Electric Discharge Technology, as Monolithic Reinforced Concrete Structure." Key Engineering Materials 771 (June 2018): 75–81. http://dx.doi.org/10.4028/www.scientific.net/kem.771.75.
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The construction of territories with problematic engineering and geological conditions in the presence of unstable, crossed relief is a complex geotechnical task. Therefore, the main purpose of the work is to study the features of the ground anchor, which is made by electric discharge technology, as a monolithic reinforced concrete structure. The questions related to the provision of safe methods of construction and erection works for the erection of any facility in such territories are related to a multifactor problem connected, primarily with the need to develop special geotechnical technologies tied to real engineering and geological conditions, loads from previously erected buildings and structures and, secondly, the actual implementation of them on a particular construction site. The case considered in the article from the geotechnical practice of construction of the facility is confirmed by the fact that due to the availability of modern design and construction and construction works, it is possible to solve any complex problems related to the issues of ensuring the stability of slopes.
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Wang, Xue-yan, Yi-li Yuan, Chang-ming Hu, and Yuan Mei. "Research on the Geostatic Stress Field Procedure under Complex Conditions." Advances in Civil Engineering 2021 (April 17, 2021): 1–15. http://dx.doi.org/10.1155/2021/6674369.
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Geostatic stress field procedure is the first and the most important step for the numerical simulation of geotechnical engineering, which greatly influences the simulation results. Traditional methods often fail when the model is complex. In this paper, based on finite element method (FEM) software ABAQUS, failure reasons of four commonly used methods for the geostatic stress field are studied. According to the analysis results, a new set of methods, which can provide reasonable displacement and stress field results under complex conditions, is proposed. The proposed methods follow the principle that the stress of different materials should be obtained separately to avoid stress distortion. Then, the accuracy and applicability of the proposed method are verified through a comparison study and a specific application. This study provides a theoretical basis for the method of geostatic stress field procedure under complex condition and can serve as a reference for relevant studies.
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Gil-Mastalerczyk, Joanna, and Regina Gil. "Difficult Geotechnical Conditions Under the Palace Complex, Case Study from Cianowice, Near Krakow, Poland." IOP Conference Series: Earth and Environmental Science 44 (October 2016): 022031. http://dx.doi.org/10.1088/1755-1315/44/2/022031.
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Sokolova, Olga, and Darya Trubina. "The Calibration of Parameters in Hardening Soil Model Based Odometer Tests." Applied Mechanics and Materials 633-634 (September 2014): 1058–64. http://dx.doi.org/10.4028/www.scientific.net/amm.633-634.1058.
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Finite element method is often used to solving composite geotechnical problems. Application of these programs demands special attention for models for the setting parameters and simulation of soil behaviour. The problem of model selection to describe the behaviour of soils for calculation of settlement is considered in test task applied to complex geotechnical conditions of Saint-Petersburg. Comparison of obtained settlement values is carried out in Linear Elastic model, Mohr-Coulomb mode and, Hardening Soil model. The results of calibration of parameters for geotechnical model from the use of the qualities of odometer testing are shown.
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Dong, Lihu, Jundong Chen, Danqing Song, et al. "Application of Long-Range Cross-Hole Acoustic Wave Detection Technology in Geotechnical Engineering Detection: Case Studies of Tunnel-Surrounding Rock, Foundation and Subgrade." Sustainability 14, no. 24 (2022): 16947. http://dx.doi.org/10.3390/su142416947.
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The adverse geological conditions of soil cave, karst cave and goaf in deep foundation directly affect the safety and economy of geotechnical engineering construction. It is a difficult problem in geotechnical engineering detection to detect the distribution of bad geological conditions efficiently and accurately. Aiming at the problems of short penetrating distance and low resolution of cross-hole acoustic wave detection in rock-soil mass, based on the characteristics of acoustic wave propagation in rock and soil layers and comprehensively utilizing the spark source and data acquisition device, a long-distance cross-hole acoustic wave detection technology is proposed. According to the indoor concrete model test and field tests of geotechnical engineering, the applicability of the long-distance cross-hole acoustic wave detection technology in the detection of geotechnical structure and adverse geological phenomena under complex geological conditions is verified. The results show that acoustic wave CT imaging can accurately detect the cavities in the indoor concrete model test. In addition, the field tests of the grouting effect of tunnel-surrounding rock, high-rise building foundation and subgrade further verify the rapidity, accuracy and intuitiveness of the long-distance cross-hole acoustic wave detection technology. This work provides a reference for eliminating the potential safety problems caused by adverse geological conditions and similar geotechnical engineering investigation.
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Rudko, G. I., and Ye O. Yakovlev. "REGIONAL TECHNOGENIC CHANGES IN ECOGEODYNAMIC CONDITIONS OF THE DEVELOPMENT OF IRON ORE DEPOSITS IN KRYVBAS." Мінеральні ресурси України, no. 2 (July 25, 2018): 43–50. http://dx.doi.org/10.31996/mru.2018.2.43-50.
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The article deals with the study of geotechnical conditions in Kryvbas. The major factors of technogenic changes in an ecological state of the geological environment during development of ferruginous quartzite deposits have been determined. The big mining complex in Kryvbas is a complex natural-technogenic geosystem with the mainly irreversible use of raw material resources the renewable ability of which is quite low. One of the main factors of the environmental impact of PGTS Kryvbas is the formation of signi
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Makarov, Vladimir, and Valery Makishin. "Megalopolises geotechnics." E3S Web of Conferences 56 (2018): 01012. http://dx.doi.org/10.1051/e3sconf/20185601012.
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Necessity of formation of the uniform concept of maintenance of development of the megalopolises, combining building of aboveground and underground complexes is shown. Interaction of elements of geotechnical system ≪a megalopolis - an underground construction≫ with a view of maintenance of ability to live of underground constructions of megalopolises is considered. Classification of conditions of development of megalopolises by stage of use of the underground space, added with criteria of reliability, safety and an economic optimum is developed. Conditions of maintenance of ecological compatibility and infrastructural appeal of megalopolises, as centres of cultural and commercial development are considered. Necessity of formation of the general scientific discipline ≪Megalopolises Geotechnics≫, covering a complex of methods of aboveground and underground building of megalopolises taking into account reliability and safety of functioning, ecological compatibility, infrastructural appeal, and also an economic optimality answering to criterion is formulated.
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Pronozin, Ya A., R. V. Melnikov, N. Yu Kiselev, A. A. Tarasenko, and Yu D. Gress. "Effectiveness of compensatory injection as a means of regulating the stresses in complex geotechnical conditions." Construction and Geotechnics 14, no. 2 (2023): 51–62. http://dx.doi.org/10.15593/2224-9826/2023.2.04.
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Deep excavations in dense urban areas often result in additional settlement of buildings that fall within the influence area of new construction. The most sensitive to such settlements, according to the normative literature, are historic buildings. One of the ways to regulate additional building settlement in the influence area of deep excavations is compensatory injection. The hydraulic fracture network created in the foundation creates additional lateral compression of the soil and changes its physical and mechanical properties. The article deals with a real example of an emergency situation at one of the objects in Tyumen, where during excavation of a pit with the designed depth of 7 meters for the construction of a five-storey building with an extended two-level underground space significant excessive settlement of the adjacent historic building and damage to its bearing structures were revealed as a consequence of the additional settlement development. The purpose of the present study is to evaluate the effectiveness of compensatory injection using collar technology to reduce excessive additional settlement of buildings in the zone of influence of deep excavations. A comprehensive analysis of the impact of new construction on the surrounding environment has been carried out by the authors of the article by means of numerical simulation. Analyzing the results of numerical modelling, the authors of the article developed measures to eliminate the emergency situation and stabilise the foundation. Based on the results of geodetic monitoring, it was found that the installation of a geotechnical barrier by injecting soil using the collar technique not only stabilised the foundation but also brought the building into position to meet regulatory requirements.
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Estrada, Beatriz, Tim Nash, Andrew de Ambrosis, and Irene Chan. "Characterisation Of Complex Ground Conditions For The Rozelle Interchange Project." Australian Geomechanics Journal 57, no. 4 (2022): 97–111. http://dx.doi.org/10.56295/agj5746.
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The Rozelle Interchange Project (RIC) in Sydney is an underground motorway interchange connecting multiple underground and surface arterial roads as well as the future Western Harbour Tunnel and Beaches Link. RIC completes the WestConnex program of works and is a complex array of approximately 22 km of multiple level tunnels, all constructed in an area 2.5 km long and 1.5 km wide. RIC is located within complex ground conditions that include deep soils, regional faults, structural zones and igneous intrusions. Deep natural soils infilling a valley near Rozelle Bay are mostly recent Holocene alluvial, marginal marine and marine deposits. These soils are interlayered, discontinuous, normally to slightly over consolidated and capped by sand and coarse rockfill from 19th century reclamation. There is a strong contrast in the level of detail between borehole and CPT data. Distilling this to provide a geological and geotechnical model for a project wide interpretive report for designers of multiple structures required a hybrid approach to model presentation. This included providing a simplified graphical model and including details from specific investigations and laboratory testing allowing designers flexibility to adopt appropriate parameters for their specific application. Similarly, the rock structural model evolved from development of structural domains to identification and inclusion of regional geological structures overprinting the structural model. Regional scale thrust faults, corridors of structural complexity and igneous intrusions were identified and refined prior to and throughout the design process. These were considered in the design by modification of excavation sequencing and changes to tunnel support. Tunnel excavations encountered these regional features at the locations predicted and with similar character as those described in the model allowing the safe construction of the tunnels.
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Clark, J. I., and J. Y. Guigné. "Twenty-fifth anniversary special paper: Marine geotechnical engineering in Canada." Canadian Geotechnical Journal 25, no. 2 (1988): 179–98. http://dx.doi.org/10.1139/t88-023.
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Marine geotechnical engineering in Canada is over one hundred years old, having started with overwater drilling and testing for bridges and nearshore structures. Its growth has been sporadic, with not much attention being directed to the geotechnical properties of marine soils until the late 1970's when design of artificial islands made up of large caissons started to develop. For about the last 15 years, marine geotechnical engineering has been driven by the oil and gas industry. Most of the action has been in the Beaufort Sea, where complex site conditions have necessitated detailed geotechnical field drilling, sampling programs, and in situ testing. Very little geotechnical engineering research work or site investigation has been carried out off the east coast except for the Hibernia site on the Grand Banks. In the coming years we can expect to see dramatic changes in site investigation methods. The use of robotics and expert systems coupled with innovative geophysical techniques could dramatically change our methods of site characterization and measurement of geotechnical properties. Key words: marine geotechnical engineering, Beaufort Sea, Grand Banks, Scotian Shelf, in situ testing, geophysical – geotechnical relationship, future trends.
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Netto, Geraldo Oliveira da Silva. "MODERNIZAÇÃO DOS MÉTODOS CONSTRUTIVOS DE FUNDAÇÕES PROFUNDAS EM CENÁRIOS DE VERTICALIZAÇÃO URBANA." Revista ft 29, no. 146 (2025): 52–53. https://doi.org/10.69849/revistaft/pa10202505111352.
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This study explores the applicability of technological innovations in deep foundations under various geotechnical conditions, as well as the environmental and regulatory implications associated with these construction practices. The primary aim was to identify and evaluate the effectiveness of innovative techniques and materials in deep foundations, considering complex geotechnical variables and the sustainability requirements imposed by environmental regulations. The methodology involved an integrated analysis of advanced techniques such as monitored helical piles and micro piles, assessing their functionality in challenging geotechnical contexts and their compliance with stringent environmental standards. It was concluded that these innovations not only provide effective solutions to complex engineering problems but also promote more sustainable practices, aligned with current environmental legislation. This study underscores the importance of integrating technological advancements and environmental regulations to foster responsible and innovative construction practices. The research highlights areas for future studies, including the standardization of impact assessments and the development of clearer guidelines for implementing technologies in foundations.
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Indra, Prakash, and Darji Kishanlal. "Engineering Geological and Geotechnical Investigations of Major Dams: A Review of the Sardar Sarovar (Narmada) and Karjan Dams, Gujarat, India." Journal of Advances in Geotechnical Engineering 7, no. 3 (2024): 14–24. https://doi.org/10.5281/zenodo.13735695.
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<em>This review paper examines the engineering geological and geotechnical investigations conducted for the Sardar Sarovar (Narmada) Dam and the Karjan Dam in Gujarat, India. The Narmada River, a major west-flowing river in India, traverses a complex geological environment characterized by Deccan basalt and infra-trappean sedimentary rocks. The Sardar Sarovar Dam, a concrete gravity dam, and the Karjan Dam, a masonry-concrete gravity dam, faced significant challenges due to these geological conditions. This paper reviews the methodologies employed in geological and geotechnical assessments, including literature reviews, geological studies, seismotectonic analyses, and engineering geological evaluations. It also addresses issues such as rock mass characterization, foundation treatment strategies, and seismic considerations. Detailed investigations have identified problems such as settlement, sliding, and seepage in both dams. The key findings underscore the importance of comprehensive geotechnical investigations and tailored treatments to ensure the stability and safety of large-scale dam projects in complex geological settings.</em>
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Karasev, Maxim, and Tatsiana Astapenka. "Assessment of the Influence of Formation Conditions of Embankments and Spoil Heaps on Their Stability When Dumped on Clay-Salt Slurries." Eng 6, no. 1 (2024): 2. https://doi.org/10.3390/eng6010002.
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The formation of geotechnical structures on foundations composed of low-strength soils is associated with a number of risks and difficulties. Soils such as clay-salt slurries are characterized by low bearing capacity and a tendency to deform under load. In this study, a numerical simulation of the stability analysis of an embankment constructed on low-strength soils consisting of clay-salt slurries is carried out, and the study of the dependence of the stability and behavior of the embankment on the configuration of this foundation, without taking into account the embedment of rocks and with introduction of rocks into the geotechnical system, is considered. The results prove that the sloping configuration of low-strength soils greatly complicates the stability of the embankment. It is noted that the stability factor is significantly reduced under the influence of loads on low-strength soil, particularly when the geotechnical system has a configuration with slope angles of 5° and 10°, and, in addition, when rocks are embedded in low-strength soil if the underlying soil layer is a weak foundation. In view of this, the assessment of embankment stability on clay-salt slurries requires careful analysis due to a number of specific characteristics of these soils that create complex geotechnical conditions.
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Zotsenko, Mykola, Yuriyvynnykov ., and Maksym Kharchenko. "Experience of Weak Soil Reinforcement by Soil-Cement Elements Manufactured by Deep Soil Mixing Technology." International Journal of Engineering & Technology 7, no. 3.2 (2018): 486. http://dx.doi.org/10.14419/ijet.v7i3.2.14577.
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Problematic issues of construction and operation in complex geotechnical conditions are systematized (subsiding and peaty soil, silt, filled, man-made soil, saturated, land sliding and seismically hazardous territories, densely developed areas) by the means of reinforcing soil massif by vertical soil-cement elements (SCE) using deep soil mixing (DSM) technology. The practical solution experience of highly efficient “man-made soil-cement base – foundation – structure” systems is shown by the example of complex geotechnical conditions under static and dynamic influences (including earthquakes and critical failure man-made loads), and excavation using SCE. A decreasing in a settlement of soil-cement bases of buildings by 2 – 4 times compared to natural soil massif and increasing in soil-cement mechanical features by 2.5 times has been established. The options of decreasing the seismic hazard (increasing the seismic stability of soil) for securing the emergency-free operation of oil storage vertical steel tank in case of the varying intensity earthquakes utilizing the man-made soil-cement base has been justified.
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Zotsenko, М., Yu Vynnykov, М. Kharchenko, and І. Lartseva. "RELIABILITY CONTROL OF EXPLOITATION OF OIL STORAGE TANKS BASES IN COMPLEX GEOTECHNICAL CONDITIONS AT SEISMIC EFFECTS." Problems and prospects of oil and gas industry, no. 2 (December 6, 2018): 65–90. http://dx.doi.org/10.32822/naftogazscience.2018.02.065.
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Xia, Yingjie, Qingkun Meng, Chuanqing Zhang, et al. "Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses." Geofluids 2021 (October 13, 2021): 1–23. http://dx.doi.org/10.1155/2021/7278131.
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In the engineering of underground construction, the discontinuous structures in rock mass have important influences on the mechanical behaviors of the subsurface of rock mass. The acquisition of mechanical parameters is the basis of rock mass engineering design, construction, safety, and stability evaluation. However, the mechanical parameters and failure characteristics of the same rock mass under different mechanical conditions cannot be obtained due to the limitations of specimen preparation techniques. In recent years, with the continuous development of 3D printing (3DP) technology, it has been successfully applied to the repetitive preparation of rock mass samples. The combinations of 3DP and other techniques, such as 3D scanning and CT scanning, provided a new approach to study the mechanical behavior of complex structural rock masses. In this study, through a comprehensive review of the technical progress, equipment situation, application fields, and challenges of the use of 3DP technology, the following conclusions were obtained: (1) 3DP technology has advantages over traditional rock mass specimen preparation techniques, and the verification of test results using 3D printed samples shows that the 3DP has broad application prospects in geotechnical engineering. (2) The combination of 3DP and other advanced techniques can be used to achieve the accurate reconstruction of complex structural rock masses and to obtain the mechanical and failure characteristics of the same rock mass structure under different mechanical boundary conditions. (3) The development of 3DP materials with high strength, high brittleness, and low ductility has become the major bottleneck in the application of 3DP in geotechnical engineering. (4) 3D printers need to meet the high precision and large size requirements while also having high strength and long-term printing ability. The development of 3D printers that can print different types of materials is also an important aspect of the application of 3DP in geotechnical engineering.
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Xia, Yingjie, Qingkun Meng, Chuanqing Zhang, et al. "Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses." Geofluids 2021 (October 13, 2021): 1–23. http://dx.doi.org/10.1155/2021/7278131.
Full textAbstract:
In the engineering of underground construction, the discontinuous structures in rock mass have important influences on the mechanical behaviors of the subsurface of rock mass. The acquisition of mechanical parameters is the basis of rock mass engineering design, construction, safety, and stability evaluation. However, the mechanical parameters and failure characteristics of the same rock mass under different mechanical conditions cannot be obtained due to the limitations of specimen preparation techniques. In recent years, with the continuous development of 3D printing (3DP) technology, it has been successfully applied to the repetitive preparation of rock mass samples. The combinations of 3DP and other techniques, such as 3D scanning and CT scanning, provided a new approach to study the mechanical behavior of complex structural rock masses. In this study, through a comprehensive review of the technical progress, equipment situation, application fields, and challenges of the use of 3DP technology, the following conclusions were obtained: (1) 3DP technology has advantages over traditional rock mass specimen preparation techniques, and the verification of test results using 3D printed samples shows that the 3DP has broad application prospects in geotechnical engineering. (2) The combination of 3DP and other advanced techniques can be used to achieve the accurate reconstruction of complex structural rock masses and to obtain the mechanical and failure characteristics of the same rock mass structure under different mechanical boundary conditions. (3) The development of 3DP materials with high strength, high brittleness, and low ductility has become the major bottleneck in the application of 3DP in geotechnical engineering. (4) 3D printers need to meet the high precision and large size requirements while also having high strength and long-term printing ability. The development of 3D printers that can print different types of materials is also an important aspect of the application of 3DP in geotechnical engineering.
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Sviatohorov, Illia O. "Application of geotechnical structures in «green construction»." Environmental safety and natural resources 50, no. 2 (2024): 36–47. http://dx.doi.org/10.32347/2411-4049.2024.2.36-47.
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Green buildings are structures that are located, designed, built, renovated and operated in accordance with the main principles of energy efficiency, and that they will have a positive impact on the environment, economy and social sphere during their entire life cycle. The need to save energy and mitigate environmental problems contributed to the emergence of a wave of green innovations in construction, which continues to this day. The main goal of the concept of sustainable development in geotechnical "green construction" is to: provide it with economic competitiveness and sufficient usefulness; at the same time, reduce energy and material consumption; reduce the area of land plots allocated for construction; to minimize risks of harm to health and life of people in case of accidents and undesirable events during geotechnical construction. The reconstruction of Postal Square is one of the largest infrastructure projects in Kyiv in recent years. Large traffic flows in the "north-south" direction pass through the square, and the absence of a modern transport hub in this area complicates car traffic. The reconstruction project provided for the construction of a two-lane road tunnel, an overhead transport overpass (the first phase of construction), as well as a two-story underground shopping complex with a total area of about 8,000 m2 (the second phase of construction) and complex improvement of the territory with the arrangement park and fountain. The construction was carried out taking into account the high responsibility of the construction and the complexity of the engineering and geological conditions of the construction site. The requirements of geotechnical "green construction" in the conditions of dense urban development based on a systemic approach were met. At the same time, the following were resolved: the absence of shear deformations of the surrounding slopes during the construction of the pit, construction and operation of the structure; integrity of surrounding buildings; ensuring reliable operation of the metro line; strength and reliability of structures under construction; preservation of the original hydrogeological regime of the territory; preservation of underground monuments of history and architecture, other issues.
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Schofield, Alistair, and Nicholas Roberts. "Applying the engineering geological model approach to quaternary glacial geology in western Tasmania." Australian Geomechanics Journal 59, no. 3 (2024): 151–65. http://dx.doi.org/10.56295/agj59310.
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Tasmania is unique in Australia for its extensive, preserved glacial landscapes, which are concentrated in remote areas. Numerous high-value mining and hydroelectric assets in those settings necessitate understanding of glacial features, including their geomorphological indicators, stratigraphical complexity, and geomechanical conditions. At least five Quaternary glaciations of progressively more limited extent have been differentiated in Tasmania. They span from at least the Early Pleistocene (ca. 1 Ma) to the Last Glacial Maximum (ca. 20-18 ka) with all glaciers having disappeared by 14 ka. Glacial deposits can be geotechnically challenging due to high heterogeneity and anisotropy, producing complex lateral and vertical variations in geomechanical properties. The wide age range of Tasmania’s glacial deposits contributes further complexity through variations in weathering and cementation. The Engineering Geological Model (EGM) approach helps firstly to effectively identify and assess geological relationships and geotechnical properties, and secondly to adequately address these conditions during engineering design and construction. In previously glaciated landscapes, this approach provides an important framework to enable thorough understanding of complex deposits, consequent geomechanical behaviour, and potential hazards. This paper outlines the geotechnical investigation methodologies that are potentially suitable for diverse glacial units and demonstrates the utility of the EGM approach through its application to a new tailings storage facility at Renison Bell in western Tasmania. There, three glacial units were encountered: surficial, glaciofluvial sandy gravel of variable thickness and permeability; weak, liquefiable, rhythmically laminated glaciolacustrine silt and clay; and previously unidentified, locally indurated till draping bedrock. Their properties, stratigraphical relationships, and geographical distributions suggest that these units record the first two glaciations to affect Pieman Valley. A desktop study and conceptual model, substantially refined as an observational model, provided interpretation confidence and enabled completion of construction on time.
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Gao, Yunpeng, Li Qian, Tianzhi Yao, et al. "An Improved Physics-Informed Neural Network Algorithm for Predicting the Phreatic Line of Seepage." Advances in Civil Engineering 2023 (April 15, 2023): 1–11. http://dx.doi.org/10.1155/2023/5499645.
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As new ways to solve partial differential equations (PDEs), physics-informed neural network (PINN) algorithms have received widespread attention and have been applied in many fields of study. However, the standard PINN framework lacks sufficient seepage head data, and the method is difficult to apply effectively in seepage analysis with complex boundary conditions. In addition, the differential type Neumann boundary makes the solution more difficult. This study proposed an improved prediction method based on a PINN with the aim of calculating PDEs with complex boundary conditions such as Neumann boundary conditions, in which the spatial distribution characteristic information is increased by a small amount of measured data and the loss equation is dynamically adjusted by loss weighting coefficients. The measured data are converted into a quadratic regular term and added to the loss function as feature data to guide the update process for the weight and bias coefficient of each neuron in the neural network. A typical geotechnical problem concerning seepage phreatic line determination in a rectangular dam is analyzed to demonstrate the efficiency of the improved method. Compared with the standard PINN algorithm, due to the addition of measurement data and dynamic loss weighting coefficients, the improved PINN algorithm has better convergence and can handle more complex boundary conditions. The results show that the improved method makes it convenient to predict the phreatic line in seepage analysis for geotechnical engineering projects with measured data.
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Becker, Dennis E., WJ (Bill) Burwash, RA (Bob) Montgomery, and Y. (Bill) Liu. "Foundation design aspects of the Confederation Bridge." Canadian Geotechnical Journal 35, no. 5 (1998): 750–68. http://dx.doi.org/10.1139/t98-038.
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The Confederation Bridge is a 12.9 km long multi-span bridge spanning the Northumberland Strait to connect the provinces of Prince Edward Island and New Brunswick on the east coast of Canada. It is the longest continuous marine span bridge over ice-covered water in the world. The bridge is a design, build, operate, and transfer facility with the Government of Canada being the ultimate owner. Construction started in October 1993, and the bridge officially opened, on schedule, to traffic on June 1, 1997. The combination of deep water, high lateral and eccentric loads, complex geology and variable strength bedrock, and short construction window due to ice and bad weather introduced many foundation engineering challenges. This paper summarizes and discusses the geotechnical aspects of foundation design and construction monitoring services for the bridge. The geological setting and geotechnical conditions, the loading conditions and design criteria, specialized geotechnical analyses, foundation design, and construction quality assurance - quality control issues are described and discussed.Key words: Confederation Bridge, Northumberland Strait, foundation design, quality assurance, ring footing, drilled shafts.
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Nikitina, Nadezhda S., and Hieu Le Trung. "Methodology for evaluating the bearing capacity of a deep excavation barrette in complex geotechnical conditions in Hanoi." Stroitel'stvo: nauka i obrazovanie [Construction: Science and Education] 13, no. 1 (2023): 6–21. http://dx.doi.org/10.22227/2305-5502.2023.1.1.
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Introduction. At present, the rate of growth in the development of urbanisation processes in large cities is increasing rapidly every year. At the stage of preliminary design of pile foundations, an important part is to determine the bearing capacity of the pile. Barrettes are effective foundation structures, also for high-rise buildings on soft soils. In such conditions, long barrettes are designed. At the same time the used normative methods used of calculating the bearing capacity and settlement do not take into account the features of the stress-strain state of the foundation and the interaction with barrettes in the foundations of high-rise buildings with a developed underground part. Materials and methods. The task has been considered on the basis of the results of field testing with piles (static load method) with the calculation by the analytical method according to the strength characteristics of the soil foundation, described in the regulatory documents SP 24.13330.2011 “Pile Foundations”. A new calculation method is proposed, which is set out in Appendix D of the specified set o.rules, taking into account relevant factors, such as the relative position of piles in the ground, their length, pitch, etc. Results. A graph of the dependence of settlement on load was obtained based on the results of full-scale tests of barrettes with a limiting settlement of 40 mm. Analytical results are compared with field testing of a pile in difficult engineering and geological conditions in Hanoi, Vietnam. Conclusions. The conclusions obtained by the analytical method of calculating the bearing capacity of a single barrette in terms of strength characteristics, taking into account unloading on soft soils during the development of a deep pit, are quite close to the results of static field tests. These solutions can be applied to determine the bearing capacity of piles and barrettes on soft soils.
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Izakson, V. Yu, A. V. Samokhin, and V. I. Sleptsov. "Support of a vertical-shaft collar under complex geocryological conditions." Journal of Mining Science 30, no. 6 (1994): 575–82. http://dx.doi.org/10.1007/bf02047325.
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Kondratyev, S. A., G. R. Bochkaryov, and A. S. Izotov. "Conditions for the formation of a “particle-bubble” flotation complex." Journal of Mining Science 36, no. 2 (2000): 175–84. http://dx.doi.org/10.1007/bf02551798.
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Dashko, Regina E., and Angelina G. Karpenko. "Scientific-Practical Enhancement Principles for the Long-Term Stability of Cultural Heritage Objects through a Multi-Component Underground Space Analysis." Heritage 7, no. 8 (2024): 4455–71. http://dx.doi.org/10.3390/heritage7080210.
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This article presents approaches for enhancing engineering-geological and geotechnical research for the restoration and reconstruction projects of cultural heritage objects in St. Petersburg’s historical center. According to the Venice Charter, an interdisciplinary approach is recommended for developing a preservation program for cultural heritage objects. The authors consider the underground space as a multi-component system, where soils are a host medium for underground water with specific composition, complex physicochemical and biochemical conditions, the presence and vigorous activity of microorganisms, gases of various origins, and underground bearing and enclosing structures. The last of these components is crucial for the long-term stability of historical and cultural objects, as they interact in complex with water-saturated soils and microorganisms. This approach is not to be found in Russian cultural heritage preservation regulations. In engineering-geological and geotechnical research, multi-component underground space should be studied at the regional, local, and object levels. Assessing redox conditions in the underground environment is crucial for understanding the state of its components. Moreover, this can trigger hazardous processes such as changes in the stress–strain state and unconsolidation of the soil layer due to the generation of low-solubility gases and biocorrosion of ancient and modern building materials, causing premature destruction. Recommendations are provided for carrying out engineering-geological and geotechnical research based on cultural heritage objects, considering the multi-component underground space and features of its geoenvironmental state due to the long-term contamination and transformation of its components.
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Cripps, J. C., P. B. Attewell, and J. P. Woodman. "Economic design of ground investigations for planning." Geological Society, London, Engineering Geology Special Publications 4, no. 1 (1987): 61–68. http://dx.doi.org/10.1144/gsl.eng.1987.004.01.05.
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AbtractPlanning the development of an urban area is a complex operation in which many disparate objectives and constraints must be reconciled. An attempt is usually made to achieve particular aims at minimum cost. If geological and geotechnical factors are considered in isolation, then a particular structure will cost least to build in locations offering the most favourable ground conditions. Unfortunately, seldom is suitable geological and geotechnical information available at this early stage of development.The paper outlines a mechanism whereby reduction in the uncertainty about the ground conditions, achieved by carrying out site investigations work, may be related, through the application of simple probability theory, to a consequent expected loss caused by construction or maintenance. Thus in planning decisions a financial optimum can be identified in which the cost implications of ground investigations, construction and maintenance can be taken into account.
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Gao, Yunfei, Guogui Huang, Yinxi Li, Junyuan Zhang, Zeng Yang, and Meng Wang. "The Data-Driven Homogenization of Mohr–Coulomb Parameters Based on a Bayesian Optimized Back Propagation Artificial Neural Network (BP-ANN)." Applied Sciences 13, no. 21 (2023): 11966. http://dx.doi.org/10.3390/app132111966.
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Homogenization methods can characterize the mechanical properties of these materials based on appropriate constitutive models and data. They are also applied to the characterization of mechanical parameters under complex geotechnical conditions in geotechnical engineering because of the complexity and heterogeneous nature of geotechnical materials. Unfortunately, existing homogenization methods for geotechnical mechanical parameters often incur immense computational costs. Hence, a framework that utilizes finite element analysis for generating a dataset which is then trained using a Bayesian Optimized Back Propagation Artificial Neural Network (BP-ANN) to obtain the homogenized Mohr–Coulomb parameters of the soils is proposed. This is the first time that Bayesian optimization and a BP-ANN have been used in conjunction to predict the homogenized mechanical parameters of soils. The dataset used for training the data is generated using the commercial FEM software ABAQUS (6.10). The maximum difference between the top and bottom part of the tunnel of the heterogeneous model and homogeneous model of our test cases only varies by 5.3%, thereby verifying the excellence of the Bayesian Optimized BP-ANN.
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Vitali, Osvaldo, Tarcisio Barreto Celestino, and Antonio Bobet. "New modeling approach for tunnels under complex ground and loading conditions." Soils and Rocks 44, no. 1 (2021): 1–8. http://dx.doi.org/10.28927/sr.2021.052120.
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Totani, F., G. Totani, and V. Tomei. "Strategies to stabilise a complex instability phenomenon in Central Italy." IOP Conference Series: Earth and Environmental Science 1249, no. 1 (2023): 012010. http://dx.doi.org/10.1088/1755-1315/1249/1/012010.
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Abstract The instability phenomena that regards very large and complex landslides are a challenge to minimize social and economic losses. In this paper we present the studies to programme and design the stabilizing works of the complex slope instability phenomena in the town of Lettomanoppello (Central Italy). It is located in the central-eastern margin of the Apennines, along the north-western foothills of the relief of the Maiella Mountain (2793 m a.s.l.). The slope, on which the village of Lettomanoppello (350 m a.s.l.)is located, is historically known for its susceptibility to landslides. These phenomena involve geo-morphological aspects and geotechnical conditions and complex geo-materials characteristics. The area incudes Quaternary continental deposits (detritus deposits, limestone debris hetero-metrics, landslide body) and Mio-Pleistocene marine deposits (clay, clay, marl and chalk alteration; limestone). The hydrogeological conditions of the area are characterized by a complex drainage system that affects the stability of the slope. Among the stabilization works that are provided in design, the drainage works take a prominent role. The paper presents the geotechnical characterization for the design (location and dimensions) of the tunnel for deep water drainage. The location of drainage tunnel was design according to the hydraulic condition. The tunnel crosses a horseshoe shaped underneath the historical centre of Lettomanoppelllo and the elevation of its mouths are at 290 m a.s.l. The total length is about 1000 m, and the coverings vary from 60 m to 100 m. The operation of drainage tunnel improves the overall stability of the slope and the drainage waters will be conveyed to pipe towards a hydraulic turbine located at 190 m a.s.l. in the lower part of the slope to produce electric energy.
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Thaman, Narryn, Jessica Holmes, Paul Wilkinson, et al. "Developing a novel geophysical tool to investigate the influence of vegetation on slope stability." E3S Web of Conferences 382 (2023): 05008. http://dx.doi.org/10.1051/e3sconf/202338205008.
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Vegetation is important for managing shallow geotechnical assets. However, root water uptake-driven changes in slope hydrology and the near-surface (soil water content, matric suction, and hydraulic conductivity) are highly complex. Improved knowledge of these processes is increasingly important as society faces the threat of a greater prevalence of climate-driven extreme rainfall and drought events. Intrinsic factors affect slope stability, including geometry, soil properties, groundwater, and vegetation-driven matric suction. Field evidence shows that engineered slopes are susceptible to hydrometeorological instability mechanisms and pose a potential failure hazard to asset operation and public safety. This study considers the combination of a novel geophysical monitoring system and geotechnical point sensors for use in controlled laboratory conditions to assess the influence of vegetation on soil-water dynamics in the context of geotechnical infrastructure. The geophysical monitoring system, referred to here as PRIME (Proactive Infrastructure Monitoring and Evaluation system), uses electrical resistivity tomography (ERT) technology to non-invasively image changing subsurface moisture-driven processes. The PRIME system and point sensor arrays are being developed for near real-time data acquisition of transient soil moisture conditions in a suite of soil column experiments. Through addressing the challenges associated with designing integrated geophysical-geotechnical laboratory-scale monitoring experiments, this research aims to provide new tools and approaches to further our understanding of vegetation-driven soil moisture movement to better assess slope instability risk.