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1
Vivekananda, Sankarpana, e Chappidi Hanumantha Rao. "Probabilistic stability analysis of narasimharaya sagar earthen dam by using geo-studio software". E3S Web of Conferences 391 (2023): 01039. http://dx.doi.org/10.1051/e3sconf/202339101039.
Testo completoAbstract (sommario):
Since every potential failure scenario might result in significant losses in both lives and property, the construction of dams needs extensive research to ensure the safety and feasibility of these large engineering structures. In this article, the Analyses should be performed upon specifically to evaluate seepage, slope stability, and soil liquefaction of significant earthen dam. A numerical technique employing the finite element method (FEM) was used in this article. Finite element software (GEO-STUDIO 2022) was used to carry out both steady-state and transient seepage analyses and pseudo-static ground motion That deals with the present work behavior of the Narasimharaya Sagar (Gorakallu Balancing Reservoir) earthen dam which is in the earthquake prone area of Zone II (as per IS 1893-2002).Geostudio 2022’s SLOPE/W, SEEP/W, and QUAKE/W tools examine the stability characteristics slope, seepage, and earthquake (finite element modelling based software). The model with the reservoir at full capacity is initially examined using SEEP/W to identify the piezometric line, which serves as the foundation for SLOPE/W to determine slope stability. Afterwards, it is exposed to a 0.1 peak ground acceleration earthquake motion using QUAKE/W to know its dynamic stability.
2
Nofrizal, Nofrizal, e Septiwila Zarinda. "STUDI EKPERIMENTAL RESPON INTENSITAS HUJAN DAN TEKANAN AIR PORI TANAH PENGARUHNYA TERHADAP KERUNTUHAN LERENG". Ensiklopedia of Journal 4, n. 2 (24 gennaio 2022): 296–302. http://dx.doi.org/10.33559/eoj.v4i2.1067.
Testo completoAbstract (sommario):
Malalak is one of the youngest sub-districts in Agam Regency, the district was previously included in the administration of the district IV koto. Malalak sub-district officially separated its elf into its own sub-district on May 24, 2007. Simalaka Road (Sicincin-Malalak-Balingka) connects between Balingka nagari in district IV Koto, Malalak nagari in Malalak sub-district, and Tandikek nagari, Patamuan, Sicincin in Padang Pariaman district.This study is classified into applied research. will use soil parameter and rainfal to find out, and analyze the extent of rain characteristics on slope collapse, as well as compare the safe factors obtained using fellenius medote and Geo-studio V Software, due to disturbed soil stability or slope building rocks.In determining the value dari the safety factor of the slope by using software Geo-Slope /W obtained the value of safety factor is 0.70. The result of vibrational influence as well as the frequent rain stability of the slopes experienced a considerable decrease in the safety value of the slopes and showed that the slope conditions unstable. Analisis safety factor from research conducted on malalak road section KM 31 can be summed up a few things as follows. From the analysis obtained a definition of the factors that cause slope unstableness. From the calculation results can be that rainwater infiltration is very influential to the stability of the slope, where safety factors or FK (Safety Factor) slopes decrease along with the length of rainwater infiltration that occurs in the area especially during the soil hoarding process occurs, this can be seen from the results of geostudio analysis and fellenius method that shows reduced slope safety factors.
3
Yuan, Yu Lin, e Yun Feng Peng. "Analysis for the Seepage Stability of the Upstream Cofferdam of One Hydropower Station". Applied Mechanics and Materials 441 (dicembre 2013): 286–90. http://dx.doi.org/10.4028/www.scientific.net/amm.441.286.
Testo completoAbstract (sommario):
According to the geological conditions of upstream cofferdam and foundation of the hydropower station, analysis for the seepage of the upstream cofferdam used SEEP/W module of Geo-studio software. Analysis for the stability used SLOPE/W module with Swedish circle method and Bishop method. Safety factor of the upstream and downstream in different conditions was obtained. The results show that the design of the upstream cofferdam was reasonable, and it will provide theoretical basis for Seepage control design of cofferdam.
4
海, 强., e 玉卓 王. "基于Geo-studio的金池街滑坡稳定性分析". 工程技术与管理 4, n. 15 (8 gennaio 2021): 122. http://dx.doi.org/10.26549/gcjsygl.v4i15.6177.
Testo completoAbstract (sommario):
滑坡作为影响人类生命财产安全的重大地质灾害之一，对其的防治具有重要的意义，边坡的稳定性分析为滑坡的防治提供了重要的理论依据。论文以中国绵阳市梓潼县观义镇红旗社区金池街滑坡为工程实例，研究了Geo-Studio软件中SLOPE/W模块在滑坡稳定性分析中的应用。论文采用SLOPE/W模块中Morgenstern-Price、Janbu、Bishop和Sarma法四种计算方法中Morgenstern-Price和Janbu两种方法，分别针对天然及暴雨两种工况对滑坡进行稳定性计算。计算结果表明，利用Geo-Studio软件对边坡进行稳定性分析是可行的，且该软件还具有众多独特的优点。
5
海, 强., e 玉卓 王. "基于Geo-studio的金池街滑坡稳定性分析". 工程技术与管理 4, n. 15 (8 gennaio 2021): 122. http://dx.doi.org/10.26549/gcjsygl.v4i15.6177.
Testo completoAbstract (sommario):
滑坡作为影响人类生命财产安全的重大地质灾害之一，对其的防治具有重要的意义，边坡的稳定性分析为滑坡的防治提供了重要的理论依据。论文以中国绵阳市梓潼县观义镇红旗社区金池街滑坡为工程实例，研究了Geo-Studio软件中SLOPE/W模块在滑坡稳定性分析中的应用。论文采用SLOPE/W模块中Morgenstern-Price、Janbu、Bishop和Sarma法四种计算方法中Morgenstern-Price和Janbu两种方法，分别针对天然及暴雨两种工况对滑坡进行稳定性计算。计算结果表明，利用Geo-Studio软件对边坡进行稳定性分析是可行的，且该软件还具有众多独特的优点。
6
Hermansyah, Hermansyah, Irwan Irwan, Habib Satria e Indri Dayana. "Simulation of Cofferdam Calculations Using Geo-Studio Application in Peusangan Hydropower Dam Construction". Andalasian International Journal of Applied Science, Engineering and Technology 3, n. 2 (6 agosto 2023): 89–92. http://dx.doi.org/10.25077/aijaset.v3i2.82.
Testo completoAbstract (sommario):
Cofferdam is a building in the form of earth, stone, concrete or masonry filling and holds water, prevents flooding, provides irrigation. The building has many functions such as for agriculture, power generation, and tourist attractions. Cofferdam will also be very helpful in flood control which will control flood water so that it will not overflow excessively which endangers the surrounding community. Besides having great benefits. If the cofferdam collapses (broken) it will cause flash floods that result in casualties. Therefore the cofferdam must be designed safely and technically feasible. The research approach used in this study is a quantitative approach using the 2012 GEO-SLOPE program. The conclusions from the analysis of slope seepage and seepage stability are the Critical Safety Factors for cofferdam stability according to the results of the analysis after running SLOPE/W are 1.711 & 1.512 because it is higher than 1.5 (SNI 8460:2017 Geotechnical Requirements Design, This means that the stability of the cofferdam is safe. The modeling results show that the seepage discharge is 1.81x10-7 m3/s = 1.81x10-4 liters/sec = 15.64 liters/day which is smaller than the maximum allowable discharge of 50 liters/day. So it can be concluded that the seepage discharge is safe.
7
Gupta, Alinda, Md Azijul Islam e Md Jobair Bin Alam. "Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity". E3S Web of Conferences 382 (2023): 24003. http://dx.doi.org/10.1051/e3sconf/202338224003.
Testo completoAbstract (sommario):
Slope failure is a common phenomenon all over the world on both man-made and natural slopes. Prolonged rainfall is one of the climatic factors which is largely responsible for slope failure. During heavy and prolonged rainfall, a part of the rainwater infiltrates through the soil and seeps into the slope. The infiltrated water lowers the matric suction and increases the porewater pressure. Eventually, the generated porewater pressure decreases the strength of the soil which results in slope failures. To evaluate the effect of rainwater seepage on slope stability, it is necessary to investigate the hydraulic conductivity of the slope soil. The objective of this study is to evaluate the effect of hydraulic conductivity on slope failure mechanisms. A finite element analysis of slope stability was conducted using Geo-Studio software. A numerical model was developed and calibrated with field monitoring data. The field monitoring data included the observation of hydraulic conductivity using a Guelph Permeameter. Afterward, the temporal variation of rainfall and hydraulic conductivity was incorporated into the SEEP/W program and the consequent changes in slope stability were evaluated in SLOPE/W. From the numerical analysis, with the identical strength parameters of the soil, different factors of safety were observed when the slope sections retain different hydraulic properties. Based on the numerical analysis, it was observed that hydraulic conductivity greater than 4×10-6 cm/s leads to slope failure. Periodic monitoring of hydraulic conductivity in the field may provide deep insight into rainfall-induced slope failures.
8
Yu, Shuyang, Xuhua Ren, Jixun Zhang, Haijun Wang, Junlei Wang e Wenwei Zhu. "Seepage, Deformation, and Stability Analysis of Sandy and Clay Slopes with Different Permeability Anisotropy Characteristics Affected by Reservoir Water Level Fluctuations". Water 12, n. 1 (10 gennaio 2020): 201. http://dx.doi.org/10.3390/w12010201.
Testo completoAbstract (sommario):
Evaluation of slope stability under water level fluctuations is an important topic in the Three Gorges Reservoir (TGR) in China. However, most of the previous studies regarded slope soil as isotropic material, or only considered the influence of anisotropy ratio (kr = kx/ky) but ignored the anisotropy direction (α). Meanwhile, the pore pressure–stress coupling was rarely considered in the previous numerical simulations. In the present study, the SIGMA/W and SLOPE/W modules in Geo-studio are utilized to carry out the numerical simulation of Caipo slope under the drawdown of the reservoir water level, and the anisotropy ratio (kr) as well as the anisotropy direction (α) of two kinds of soils (clay and sand) are included. Results show that the anisotropy ratio kr and anisotropy direction α decrease the infiltration capacity of the soil, which increases the infiltration line hysteretic elevation (ILHE) as well as maximum horizontal displacement (MHD), and reduces the minimum safety factor (MSF). The slope toe firstly fails with the drawdown of water level. The influence of reservoir water level drop on seepage, deformation, and stability of the sand slope is less than that of the clay slope. For the sandy soil slope, it is not only necessary to consider the influence of kr, but also the influence of α. For the soil slope, we can only consider α in order to simplify calculation.
9
Yu, Shuyang, Xuhua Ren, Jixun Zhang, Haijun Wang e Zhitao Zhang. "Sensibility Analysis of the Hydraulic Conductivity Anisotropy on Seepage and Stability of Sandy and Clayey Slope". Water 12, n. 1 (18 gennaio 2020): 277. http://dx.doi.org/10.3390/w12010277.
Testo completoAbstract (sommario):
Evaluation of slope stability under rainfall is an important topic of Geotechnical Engineering. In order to study the influence of anisotropy ratio (kr = kx/ky) and anisotropy direction (α) on the seepage and stability of a slope, the SEEP/W and SLOPE/W modules in Geo-studio were utilized to carry out the numerical analysis of a homogeneous slope in Luogang District, Guangzhou City, China, which is based on the theory of unsaturated seepage and stability. Two kinds of soils (clay and sand) were included. Results show that: For sandy soil slope, the increase of kr promotes the rainfall infiltration, and the decrease of α prevents the rainfall infiltration. The maximum water content of the surface (MWCS) reaches maximum with the increase of kr and α. The rising height of groundwater (RHG) is −3–4 m and the safety factor (SF) is 1.3–1.7. For clayey soil slope, variations of kr and α have little impact on the seepage characteristics and slope stability. The MWCS remains almost the same. The rainfall infiltration depth (RID) is 0.5–1 m and the SF is about 1.7. Therefore, for sandy soil slope, it is not only necessary to consider the influence of kr, but also the influence of α. For clayey soil slope, it can be treated as isotropic material to simplify calculation.
10
Imani, Fiorentina Novella Fajri, Gerard Aponno e Akhmad Suryadi. "ANALISIS STABILITAS TUBUH BENDUNGAN PADA BENDUNGAN SEMANTOK KABUPATEN NGANJUK PROVINSI JAWA TIMUR". Jurnal JOS-MRK 2, n. 4 (15 dicembre 2021): 22–27. http://dx.doi.org/10.55404/jos-mrk.2021.02.04.22-27.
Testo completoAbstract (sommario):
Bendungan Semantok merupakan bendungan urugan tipe zonal (inti vertikal) dengan 6 zona timbunan. Bendungan Semantok merupakan prasarana pengairan yang mempunyai resiko sangat tinggi jika mengalami kegagalan. Oleh karena itu, penelitian ini memiliki tujuan untuk mengetahui besar kapasitas debit rembesan, potensi kemungkinan terjadinya erosi internal, faktor keamanan stabilitas lereng (kondisi tanpa dan dengan beban gempa), spesifikasi dan metode pelaksanaan serta perhitungan rencana anggaran biaya pada pekerjaan galian dan timbunan main dam. Data yang diperlukan diantaranya adalah data teknis bendungan, data tanah asli, data material timbunan tubuh bendungan, dan gambar desain bendungan. Penggambaran flownet dibuat dengan metode grafis lalu dilanjutkan dengan perhitungan rembesan menggunakan rumus Cassagrande dan menggunakan program Geo-Studio SEEP/W 2012. Perhitungan faktor keamanan stabilitas lereng menggunakan program Geo-Studio SLOPE/W 2012 dengan metode Fellenius. Dari hasil perhitungan diperoleh kapasitas debit rembesan yang terjadi < 1% dari rata-rata debit sungai yang masuk ke dalam waduk (0,02080 m3/detik) sehingga aman dari rembesan. Faktor keamanan terhadap erosi internal memiliki nilai 4,384 > 4 sehingga aman terhadap erosi internal. Stabilitas lereng dianalisis dalam berbagai kondisi muka air dengan dan tanpa beban gempa menghasilkan beberapa angka FK di bawah FK minimum sehingga perlu ditambah perkuatan berupa geosintetik jenis geogrid. Alat berat yang dibutuhkan adalah Excavator, Excavator+Breaker, Dump Truck, Baby Roller, Sheep Foot Roller, Smooth Drum Roller, Vibrator Roller, dan Bulldozer dengan jumlah yang disesuaikan dengan kebutuhan di lapangan. Biaya yang dibutuhkan adalah sebesar Rp. 527.835.264.000,00 untuk pekerjaan galian dan timbunan main dam Bendungan Semantok.
11
Siregar, Gerald Guntur Pandapotan. "PENGARUH RENCANA PENINGKATAN VOLUME TAMPUNGAN TERHADAP STABILITAS TUBUH BENDUNGAN KEDUNG OMBO". Jurnal Teknik Sipil 17, n. 2 (10 aprile 2023): 67–77. http://dx.doi.org/10.24002/jts.v17i2.5881.
Testo completoAbstract (sommario):
The strategy to meet the water demands of Semarang and Demak Regencies involves enhancing the storage capacity of the Kedung Ombo Dam. This augmentation will inevitably alter the typical water level, thereby affecting the stability of the dam structure as it bears a greater load. Furthermore, the Kedung Ombo Dam, which is nearly 32 years old, necessitates re-evaluation since it lacks the full benefit of contemporary design methods. This study is confined to examining the slope stability, both static and pseudostatic, at a steady state flow, with the highest normal water level elevation (elevation +92.00) as the focal point. The slope stability analysis was conducted via the finite element method using the Slope/W in Geo-Studio software. The outcome of the static slope stability analysis indicates that the safety factor of the Kedung Ombo Dam body remains above the minimum allowable safety factor. In the pseudostatic analysis, the safety factor during the Operating Basic Earthquake (OBE) remains above the minimum allowable safety factor. However, during the Maximum Design Earthquake (MDE), the safety factor demonstrates a value that is lower than the minimum allowable safety factor. Nevertheless, the analysis of fixed displacement or permanent deformation reveals that the maximum settlement that occurs during the MDE earthquake does not exceed 50% of the available freeboard.
12
Sholeh, Moch, M. Suhartono e Nur Anisfi Choirini. "ANALISIS STABILITAS TUBUH BENDUNGAN PADA BENDUNGAN UTAMA PROYEK WADUK BENDO PONOROGO". PROKONS Jurusan Teknik Sipil 13, n. 2 (16 gennaio 2020): 83. http://dx.doi.org/10.33795/prokons.v13i2.189.
Testo completoAbstract (sommario):
The work of embankment in the main dam with an upright core consists of 5 pile zones: the core, filter, random, rock, and rip-rap. There was difference in planning and implementation of embankment filling. Random and rock used quarry Bondrang in planning but blasting upstream of the excavated material was used in implementation. This difference is because there are social problems with the community surrounding the Bondrang quarry. The purpose of this thesis is to repair the dam foundation, to find out the seepage discharge, to analyze the possibility of piping, to determine the safety factor of slope stability in the dam, and to determine RAB Maindam of Bendo Dam Project Ponorogo. The required data were of the geologic of the dam foundation, embankment materials, cross-sectional images of the dam body, and dam technical. Repairing the foundation using 3 methods : curtain grouting, consolidated grouting and blanket grouting; and for seepage calculations using the Cassagrande formula; to calculate safety figures using the Fellenius method and use the Geo-Studio 2012 application, the Seep / W program to find out the seepage discharge and the Geo-slope program to find out slope stability in maindam. The analysis resulted in 3 methods of repairing dam: curtain grouting with a depth of 39.83m, consolidated grouting with a depth of 5m, and blanket grouting with a depth of 15m; seepage discharge capacity <1% passing water average meaning safe; velocity seepage (7,3816 x 10-7m/sec) < velocity critical (0,004017m/sec) and 11,97 > 4 meaning safe for piping; >1.5 slope stability in various conditions without earthquake load meaning safe; 1.2 slope stability in various conditions with earthquake load meaning safe; the estimated cost IDR290,388,884,070.62 for main dam
13
Mesa Lavista, Milena, José Álvarez Pérez e Jorge Humberto Chávez Gómez. "EVALUACIÓN DEL FACTOR DE SEGURIDAD EN TALUDES DE TERRAPLENES CARRETEROS ALTOS ANTE CARGA SÍSMICA". Revista de Ingeniería Sísmica, n. 103 (17 settembre 2020): 1–17. http://dx.doi.org/10.18867/ris.103.489.
Testo completoAbstract (sommario):
Cuando se construye un terraplén carretero, una de las variables analizadas en el diseño es la obtención del factor de seguridad para determinar la estabilidad y seguridad de los taludes. Este diseño se realiza haciendo uso de un análisis estático y, en casos más específicos y aislados haciendo un análisis sísmico. En el presente trabajo se realiza un estudio del comportamiento del factor de seguridad en taludes de terraplenes carreteros altos frente a la solicitación sísmica. Para llevar a cabo el presente estudio se realizó un diseño de experimento 32. En el diseño de experimento se varió la altura del terraplén en tres niveles y el nivel de sismicidad, construyendo acelerogramas a partir de los espectros de diseño considerando los parámetros de la sección 3.1 del Manual de diseño de obras civiles de la comisión federal de electricidad de México. En la obtención de los resultados se empleó el método de los elementos finitos (MEF) y el método de Newmark. Como herramienta computacional se empleó el software especializado Geo-Studio con el sub-módulo para el análisis dinámico QUAKE/W, y el sub-módulo para el análisis de estabilidad SLOPE/W. Los resultados obtenidos muestran la necesidad de revisar estas obras frente al sismo sobre todo en zonas de sismicidad alta cuando su altura supere los 12 m.
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Wahyudi, Rofi, e Dian Hastari Agustina. "Pengaruh Kadar Air Terhadap Kestabilan Lereng". SIGMA TEKNIKA 5, n. 1 (29 giugno 2022): 151–57. http://dx.doi.org/10.33373/sigmateknika.v5i1.4153.
Testo completoAbstract (sommario):
Permukaan tanah sebagian besar memiliki elevasi yang berbeda. Perbedaan elevasi ini dapat disebabkan oleh mekanisme alam maupun rekayasa manusia. Lereng adalah permukaan tanah (material) terbuka yang membentuk sudut tertentu dengan bidang datar (horisontal). Penelitian ini dilakukan untuk mengetahui stabiltas lereng dengan menggunakan software Geo-Studio Slope/W. Metode Bishop digunakan untuk menganalisis kestabilan lereng dengan pemodelan lereng berupa tinggi lereng 5 meter, bidang datar bawah lereng 15,14 meter bidang datar atas 9 meter dan sudut kemiringan lereng 35 derajat. Lereng berupa tanah timbunan dengan data propertis yang diperoleh dari penelitian laboratium uji pemadatan standar (Standard Proctor Test) dan uji geser langsung (Direct Shear Test) dengan nilai kadar air tanah timbunan yang bervariasi -4%OMC, -2%OMC, OMC, +2%OMC dan +4%OMC . Hasil analisis kadar air -4%OMC diperoleh nilai faktor keamanan sebesar 1,725, kadar air -2%OMC diperoleh 1,276, kadar air OMC diperoleh sebesar 1,226, kadar air +2%OMC diperoleh sebesar 0,388, dan kadar air +4%OMC sebesar 0,289. Nilai - nilai faktor keamanan yang telah diperoleh menunjukkan semakin tinggi nilai kadar air pada tanah timbunan tersebut semakin rendah nilai faktor keamanan. Sehingga dapat disimpulkan jika nilai kadar air sangat berpengaruh terhadap kestabilan lereng
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Abbas, Intisar H., e Maysam Th Al-hadidi. "Effect of Halabjah Earthquake on Al-Wand Earth Dam: Numerical Analysis". E3S Web of Conferences 318 (2021): 01016. http://dx.doi.org/10.1051/e3sconf/202131801016.
Testo completoAbstract (sommario):
The Halabja earthquake occurred on 12/11/2017 in Iraq, with a magnitude of 7.3 Mw, which happened in the Iraqi-Iranian borders. This earthquake killed and injured many people in the Kurdish region in the north of the country. There is no natural disaster more dangerous than earthquake, especially it occurs without warning, great attention must be paid to the impact of earthquakes on the soil and preparing for a wave of earthquakes. Numerical modeling using specific elements is considered a powerful tool to investigate the required behavior of structures in Geotechnical engineering, and the main objective of this is to assess the response of the Al-Wand dam to the Halabja earthquake, as this dam is located in an area that has been subjected to seismic activity recently. The modeling was done through the Geo-studio program, where the seepage was analyzed during the Al-wand dam using the Seep/w program. It was verified that the dam was safe against seepage failure and then moved to the QUAKE/W (a subprogram of GEOSTUDIO, which is used for liquefaction modeling of earthquakes and dynamic loading and determines the movement and increased pressures of pore water that arise due to earthquake vibration or sudden shock loads). The program was used to analyze the effect of the earthquake on the porewater pressure, effective stresses, and displacements. Also, it is not clear that the significant impact the earthquake has on these values. Finally, the Slope/w program was used to analyze the stability of the dam and to calculate the safety factor of the dam in two ways, and the results of the analysis show that the dam is considered safe under the influence of the tremor.
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Chen, Mo, Changlei Dai e Yang Li. "Comparative analysis of seepage simulation for embankment in cold area during ice flood season and non-ice flood season". MATEC Web of Conferences 246 (2018): 01121. http://dx.doi.org/10.1051/matecconf/201824601121.
Testo completoAbstract (sommario):
Influenced by meteorological and environmental factors, ice flood is easy to occur in cold areas, causing the flood level to rise substantially and threatening the safety of embankments. Based on the analysis of the influencing factors of the seepage of the dike in the cold region, the seepage simulation model of the dike is constructed and solved by the SEEP/W module of Geo-studio software. The seepage of the Dike Section in the ice flood season and non-ice flood season under the scenario of 100-year flood level is compared and analyzed. The results show that, (1) The seepage path of non-ice flood dike mainly passes through the base layer of the dike, and the seepage path of the dike is affected by the frozen shell during the ice flood season, and the seepage path of the dike mainly passes through the frozen shell. (2) The maximum velocity of Dike Seepage in the season of ice flood is higher than that in non-ice flood season, which is easy to cause piping and collapse. (3) the maximum gradient of the embankment during the flood season has also increased, exceeding the allowable slope value of the project. During the season of ice flood, the embankment is unstable, and the embankment protection should be strengthened during the flood season.
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Bahrami Balfeh Teimouri, Atanaz, e Ahad Bagherzadeh Khalkhali. "Stability Control of Narmab Dam and Sensitivity Analysis of Reliability Coefficients". Civil Engineering Journal 4, n. 9 (30 settembre 2018): 2197. http://dx.doi.org/10.28991/cej-03091150.
Testo completoAbstract (sommario):
Static and quasi-static stability analysis of embankment dams is of vital importance in different stages of dam’s design, construction and operation. The stability can be studied using different techniques which are generally analyzed through Limit Equilibrium Method. Base on this main method, the critical slip surface is selected and the shear strength required to counter the slip at the selected surface is obtained and compared with shear strength of the soil at that surface in order to obtain confidence coefficient. In the present research, the Geo-studio Slope/w software that is a geotechnical software based on finite element method and is widely used in geotechnical field, is employed in order to analyze the stability of the body and foundation of Narmab dam in Golestan province. Narmab dam is a homogeneous embankment dam with a height of 60 m, crest length of 807 m and reservoir volume of 115 million cubic meters. The confidence coefficients provided by the software are compared to the permissible confidence coefficients. Moreover, the sensitivity of the confidence coefficients values to the changes in the effective factors, adhesion and internal friction coefficient, is analyzed. The analyses were performed on 8 values (±5, ±10, ±15, ±20) of c and φ and the obtained values of confidence coefficients were compared. In addition, a comparison was made between different methods of stability analysis. According to the static and quasi-static conditions, Narmab dam is stable in all loading stages (End of Construction, First Impounding and Steady State Seepage and In general, only for the static conditions of the end of construction stage, the sensitivity of adhesion is greater than the angle of internal friction, but, in other conditions and stages, the sensitivity of friction angle has more effects.
18
Zhang, Xiaobing, Xin Zhang e Shuaihua Ye. "Calculation for Permanent Displacement of Single Slip Surface of Multi-Stage Loess Slope Based on Energy Method". Applied Sciences 12, n. 17 (24 agosto 2022): 8426. http://dx.doi.org/10.3390/app12178426.
Testo completoAbstract (sommario):
At present, there are still some gaps in the theoretical calculation of the permanent displacement of the multi-stage loess slope under the action of earthquake. Therefore, this paper firstly uses the GEO-Studio finite element software to explore the influence of the comprehensive slope rate on the permanent displacement when the slope rate of each grade of multi-stage loess slope changes and the stage of multi-stage slope changes. The results show that it is feasible to use the comprehensive slope rate to calculate the permanent displacement of the sliding body of the multi-stage loess slope under the action of earthquake. On the basis of this conclusion, in order to simplify the calculation of permanent displacement of potential sliding soil, the other geometric parameters of the multi-stage loess slope are replaced by the comprehensive slope rate, combined with the Newmark slider displacement analysis method and energy conservation principle, and then the calculation method of permanent displacement of potential sliding soil of multi-stage loess slope under the action of earthquake is deduced. Through an example, the permanent displacement calculated by the proposed algorithm are compared with those calculated by the PLAXIS 3D software and GEO-Studio software. The results show that the permanent displacement calculated by this method is close to that calculated by the GEO-Studio software, and the difference is only 2%, and thus, the rationality of the proposed method for calculating the permanent displacement of the multi-stage loess slope under the action of earthquake is verified. The algorithm proposed in this paper provides a theoretical reference for the calculation of the permanent displacement of multi-stage loess slope under the action of earthquake.
19
Tao, Gui Lan, Zi Shun Yao, Bin Zheng Tan, Cong Cong Gao e Yi Wen Yao. "Application of Support Vector Machine for Prediction of Slope Stability Coefficient Considering the Influence of Rainfall and Water Level". Applied Mechanics and Materials 851 (agosto 2016): 840–45. http://dx.doi.org/10.4028/www.scientific.net/amm.851.840.
Testo completoAbstract (sommario):
Slope stability estimation is a complex engineering problem involving many factors. A hybrid model based on the combination of finite element software GEO-STUDIO and support vector machine (SVM) is proposed to address the problem. The study took a high slope of Jingjiang reach of Yangtze River as the research object. Several important parameters, including values of geometric and geotechnical properties of slope as well as rainfall and water level data were used to establish the finite element model for the high slope. Besides, the validity of the model was estimate using the measured data of pore water pressure. The slope stability coefficients were calculated in GEO-STUDIO environment. And the data were used as the input samples to train and test SVM model. Results show that the agreement achieved in pore water pressure between measurement and analysis using the finite element model can be considered very reasonable. And the slope stability coefficient results by SVM coincided well with that of finite element analysis. It suggests that the proposed model has the potential to be a useful tool for the prediction of slope stability coefficient considering the influence of rainfall and water level.
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M Abbas, Jasim, e Zainab Ali Mutiny. "SLOPE STABILITY ANALYSIS FOR EARTH DAMS USING (GEO-SLOPE/W)". Diyala Journal of Engineering Sciences 11, n. 1 (1 marzo 2018): 70–81. http://dx.doi.org/10.24237/djes.2018.1112.
Testo completoAbstract (sommario):
The study of slope stability is important in the design and construction of the earth dams under influence of special states. Some factors affect on the slope stability for the earth dams such as change the water level in the reservoir, dam configuration, material properties..etc. In this study, the factor of safety of upstream slope stability for number of exist earth dams has been assessed. To achieve the objective of this study, Geo-SLOPE/W program that based on limit equilibrium methods was used. Taking into account the case of dry condition and gradually rise of water level in upstream part for these dams. It can be seems that the slope stability of the earth dams increased in case of dry condition. In addition, the slope stability increased when the water reach to maximum value.
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Aribudiman, I. Nyoman, e Yohanes Erik Kurniawan Nggae. "PENGGUNAAN PROGRAM GEO-STUDIO SEEP/W UNTUK MENENTUKAN REMBESAN AIR LINDI PADA TANAH LEMPUNG". JURNAL SPEKTRAN 10, n. 2 (31 luglio 2022): 133. http://dx.doi.org/10.24843/spektran.2022.v10.i02.p10.
Testo completoAbstract (sommario):
Tanah merupakan bahan dan tempat konstruksi bangunan sipil berdiri yang terdiri dari beberapa unsur yang berperan penting bagi kehidupan manusia. Masalah yang sering dijumpai terkait tanah adalah pencemaran akibat air lindi yang dihasilkan oleh penumpukan sampah yang terlalu lama. Penelitian ini bertujuan untuk mengetahui rembesan air lindi pada tanah lempung dengan menggunakan program Geo-Studio Seep/W. Sampel limbah cair yang digunakan adalah air lindi dari TPA Suwung. Sampel tanah menggunakan tanah lempung yang diperoleh di Daerah Suwung, Denpasar, Bali. Pemodelan rembesan dengan Geo-Studio dilakukan pada kondisi tanah lempung yang dialiri oleh air murni (tanpa limbah) dan air lindi dari TPA Suwung. Pemodelan rembesan di Geo-Studio Seep/W dilakukan pada kondisi Saturated/Unsaturated. Hasil penelitian viskositas limbah cair menunjukkan bahwa air lindi TPA Suwung memiliki viskositas sebesar 0.002061309 N s/m2. Viskositas suatu fluida mempengaruhi nilai konduktivitas hidraulik tanah. Akibat pencampuran dengan air lindi, nilai konduktivitas hidraulik tanah juga mengalami penurunan. Nilai konduktivitas hidraulik tanah menurun dari 0.0001165 cm/s menjadi 0.0000328 cm/s untuk tanah lempung. Debit rembesan dan kecepatan rembesan terbesar pada tanah lempung melalui pemodelan di Geo-Studio Seep/W adalah akibat pengaliran air murni (tanpa limbah). Besarnya pengaruh perubahan debit rembesan atau kecepatan rembesan tanah lempung TPA Suwung akibat pengaliran air limbah lindi TPA Suwung terhadap debit rembesan atau kecepatan rembesan air murni sebesar 28,320%.
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Malik, Moammed K., e Ibtisam R. Karim. "Slope Stability Analysis of Haditha Dam after Earthquake using Geo-Studio Software". Engineering and Technology Journal 39, n. 4A (25 aprile 2021): 599–613. http://dx.doi.org/10.30684/etj.v39i4a.1909.
Testo completoAbstract (sommario):
The current study is designed to analyze theslope stability of Haditha damwhich is an earth-fill dam constructed on the Euphrates River in the middle-west of Iraq. Finite element modeling was used in the present study to analyze the combined seepage and post-earthquake slope stability of Haditha earth dam. The maximum water level of a steady seepage case was considered to evaluate seepage. - Three different water levels (maximum, normal, and minimum) were applied, and nine different equilibrium slope stability limits were used to analyze the upstream and downstream slopes of the dam with three horizontal maximum accelerations.The input data given to the software are the dam geometry and its material properties with the earthquake records in the year2019.The dam was investigated by considering the water in the reservoir to be at maximum, minimum and normal water levels in its actual design. It was concluded that the dam is on the safe side in terms of stability even though the change in the earthquake's conditions in Iraq.
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Malik, Mohammed Karim, e Ibtisam Raheem Karim. "Seepage and Slope Stability Analysis of Haditha Dam using Geo-Studio Software". IOP Conference Series: Materials Science and Engineering 928 (19 novembre 2020): 022074. http://dx.doi.org/10.1088/1757-899x/928/2/022074.
Testo completo
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Wang, Nian Qin, Qing Tao Wang, Qi Pang e Qian Xue. "Study on Evaluation of High Slope Stability and Countermeasures Based on GEO-SLOPE". Advanced Materials Research 988 (luglio 2014): 371–76. http://dx.doi.org/10.4028/www.scientific.net/amr.988.371.
Testo completoAbstract (sommario):
Based on the theory of limit equilibrium, by the GEO-SLOPE software,analyzed the stability before and after reinforcement of a high Loess-bedrock slope. The results and conclusions show: (1)Analyzed and Optimized the high Loess-bedrock slope through SLOPE/W module, optimizing the engineering quantity of the anchor cable frame in the local and saving the investment; (2)When taken reinforcement measures, conducted the SLOPE/W model again, the stability coefficient is 1.459, the effect testified by projects is obvious; (3)Aiming at the optimization analysis, proposed countermeasures system, with reference for reinforcement of a high Loess-bedrock slope.
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Zhang, Hong Yu, Jiang Hu Chen, Wen Qing Wu e Jun Hua Wu. "Stability Analysis of Unsaturated Expansive Soil Slope Covered by Geo-Membrane". Applied Mechanics and Materials 744-746 (marzo 2015): 597–600. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.597.
Testo completoAbstract (sommario):
In view of the holes appearing in different area of geo-membrane when the geo-membrane technology is applied to the unsaturated expansive soil slope, the VADOSE/W is used to analyze the wetting-drying cycles caused by rainfall and evaporation on slopes covered by geo-membrane. The influence on the pore-water pressure and volume water content were discussed just caused by the holes. The results show that the hole is nearer to the toe of slope, its impact on the whole seepage field is greater. In addition, the hole appears on the top of slope that the wetting-drying cycle effect is remarkable. It is ensured that the integrity of the geo-membrane which in the lower slope and take some drainage measures in the construction process.
26
Pan, Haize, Rong Qin, Ting Mao e Mengjie Chen. "Considering the Effect of Reservoir Water Level Lifting on the Slope Stress Analysis of Seepage Field and Stress Field Coupling". Open Construction and Building Technology Journal 8, n. 1 (31 dicembre 2014): 343–50. http://dx.doi.org/10.2174/1874836801408010343.
Testo completoAbstract (sommario):
This paper analyzes the slope stress analysis of seepage-stress field under the condition of water lifting of reservoir slope, taking a practical reservoir slope project for example, on the basis of investigation and study of the geological environment, the soil geology model of the reservoir slope is established. On the basis of interaction calculation module of the fluid structure in the software Geo-Studio and Biot theory, finite element method of seepage-stress field coupling is applied to study the variation of stress field of the reservoir slope mainly with strong weathering argillaceous sandstone and marl, on the condition that reservoir water level rise and fall. The maximum principal stress is mainly compressive stress, the tensile stress just distributes near the top of the slope; the minimum principal stress is mainly compressive stress.
27
Wu, Wen Qing, Jiang Hu Chen, Hong Yu Zhang e Jun Hua Wu. "Numerical Study of Unsaturated Expansive Soil Canal Slope Covered by Geo-Membrane". Applied Mechanics and Materials 744-746 (marzo 2015): 551–54. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.551.
Testo completoAbstract (sommario):
In view of the holes appearing in different areas of geo-membrane when the geo-membrane technology is applied to the unsaturated expansive soil canal slope, the VADOSE/W is used to analyze the pore-water pressure of the internal canal slope by changing the falling water level. The results show that the hole is nearer to the toe of slope, its effect on the whole seepage field is greater. The greater the rate is, the soil water content is greater.
28
Guo, Ying, Yating Du, Wei Shan, Mengdi Liu e Chengcheng Zhang. "Numerical Analysis on the Stability of Sandstone-Covered Mudstone Cutting Slopes Considering Rainfall Infiltration". Applied Sciences 13, n. 3 (31 gennaio 2023): 1802. http://dx.doi.org/10.3390/app13031802.
Testo completoAbstract (sommario):
Landslide caused by rainfall are easily produced when excavating conduct in sandstone-covered mudstone strata. The expansion project of the Heishan Village to Jixi section of Dan-A Highway is used as an example to study the formation and damage mechanism of rainfall-induced landslide in sandstone-covered mudstone cutting slope. Finite element numerical is used to analyze the stability of the slope by using Geo-Studio and ANSYS software for the three different rainfall-influencing factors of rainfall intensity, duration and rainfall form. The study indicates that rainfall time and intensity will decrease the stability of the cutting slope, and that the effect of rainfall on the slope is lagging behind. When rainfall intensity is 80 mm, rainfall duration is 1 d, and stagnation is 5 h, the slope instability is in the critical state. The front slope toe is the first unstable part in the process of slope instability. Rock and artificial construction are important reasons for this phenomenon.
29
Wang, Nian Qin, Bo Han, Xiao Ling Liu e Zheng Yu. "Study on Infiltration Characteristics and Stability of Excavated Loess Slope in an Industry Site". Advanced Materials Research 1035 (ottobre 2014): 12–17. http://dx.doi.org/10.4028/www.scientific.net/amr.1035.12.
Testo completoAbstract (sommario):
In industrial construction of loess area, rainfall is one of the important factors inducing excavated slope instability. Take an industry site excavated loess slope in northern Shaanxi for example, using Geo-studio in steady flow state to analyze infiltration characteristics and stability of a loess slope. The results show that: (1) The influence of the X direction maximum locate at the free face of slope foot, Y direction maximum locate at the top of slope. (2) The upper slope larger permeability coefficient, the lower the permeability coefficient is smaller, aquiclude almost have no permeability, shows that the slope is loose soil, particles with skeleton structure, easy water infiltration, the farther down the soil compaction degree is high, the worse the infiltration capacity into the water, the permeability coefficient is smaller. (3) It is easy to produce water flow in aquiclude and slope toe. Then, it soften soil, reduced the shear strength of the soil. It can explain that aquiclude and free face on slope foot always is the structure plane shear outlet of slope.
30
Cai, Guang Hua, Hai Jun Lu, Wei He, Long Guan e Wei Qi Xu. "The Effect of Rainfall Infiltration Time to the Unsaturated Soil Slope Stability". Applied Mechanics and Materials 71-78 (luglio 2011): 4864–67. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.4864.
Testo completoAbstract (sommario):
Rainfall infiltration is currently one of the important factors in studying the soil-slope stability. By using saturated-unsaturated seepage theory, the traditional limit equilibrium method and so on, analyze the water content and the pore-water pressure changes under the rainfall condition, then analyze the influence mechanism of the slope stability. Through the Seep/W and the Slope/W of the GEO-Slope software, do the numerical simulation of the slope stability under the rainfall condition, to seek the distribution of pore-water pressure on the rainfall situation and the influence of the seepage field from various parameters such as rainfall intensity and the soil permeability coefficient, thus to study the slope stability.
31
Hussain Maula, Baydaa, e Ling Zhang. "Liquefaction-Induced Ground Deformation of Slopes Using Geostudio2007 Software Program". Advanced Materials Research 261-263 (maggio 2011): 1303–8. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1303.
Testo completoAbstract (sommario):
Liquefaction phenomenon which has produced severe damage all over the world was studied under earthquake record of 0.5g; one of the major effects of liquefaction is lateral spreading. Lateral spreading occurs in sloping grounds and can cause serious damage to structures and lifelines. The objective of this paper is to study the effect of earthquake shaking on soils and slope stability using Geo Studio software 2007. The applicability of the analysis is demonstrated by analysis various slope and embankments subjected to earthquake shaking. This study investigated the effect of embankment slope angle and its geometry on liquefaction. Pore water pressure can be increased by 100% to 35% as β ranged from 35ͦ to 45ͦ respectively, it can see that liquefaction zone induced by earthquake can eliminate as flattering slope and mean while reduced lateral speared displacement. Three case studies are providing to evaluation cyclic stress ratio (CSR) due to earthquake and lateral speared for soils.
32
Yang, Xiuhan, e Sai Vanapalli. "Stability analysis of unsaturated soil slope considering softening and non-softening approach". E3S Web of Conferences 382 (2023): 13008. http://dx.doi.org/10.1051/e3sconf/202338213008.
Testo completoAbstract (sommario):
In conventional geotechnical engineering practice, peak shear strength parameters are widely used in the design of geo-structures constructed with or within unsaturated soils. However, a reduction inshear strength from the peak to the residual value is typically observed during the shear deformation in typical fine-grained unsaturated soils. Several geo-structures in unsaturated soils undergo a large shear deformation prior to reaching the failure condition. Thus, the factor of safety of such geo-structures will gradually but significantly decrease with the development of the shear deformation. For this reason, the strain-softening behaviour of unsaturated soils should be considered for reliable design of the geo-structuresin unsaturated soils. In this study, an unsaturated clay slope under 10 years rainfall infiltration were modelled using softening and non-softening approach using commercial finite element software SIGMA/W. The responses of the studied slope to the long-term rainfall infiltration were analysed. The results of the softening and non-softening analysis were compared. This study provides valuable information with respect to the significance of the strain-softening that are useful in the rational design of slopes in unsaturated soils.
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Zhao, Ya. "The Influence of Rainfall and Evaporization Wetting-Drying Cycles on the Slope Stability". Advances in Meteorology 2022 (9 luglio 2022): 1–8. http://dx.doi.org/10.1155/2022/5775424.
Testo completoAbstract (sommario):
The decay of soil strength and the change of soil infiltration characteristics caused by the dry and wet cycle effect generated by the rainfall-evaporation process are important factors that induce slope instability. How to consider the effect of soil strength decay and water-soil characteristic curve hysteresis effect on transient stability change of slope is the key to solve this problem. In this paper, transient stability analysis of slopes considering soil strength decay and water-soil characteristic curve hysteresis is carried out based on Geo-Studio. The results of the study showed that the change of transient safety factor of the slope caused by rainfall-evaporation dry and wet cycle process has an overall decreasing trend and the safety factor decreased by 43% compared to the initial state. The seepage characteristics of the rainfall-evaporation dry-wet cycle have certain regularity. The location of slope measurement points has a greater influence on the magnitude of the pore pressure change: foot of slope > middle of slope > top of slope. Also, there is a significant response hysteresis in the change of pore pressure with increasing depth at the same location. The rainfall intensity has a certain influence on the change of slope safety factor, but its influence is not obvious when the rainfall intensity exceeds a certain amount.
34
Mao, Wei, E. Chuan Yan, Yang Bing Cao e Sheng Lai Jiang. "Simulation of Landslide Seepage Field with the Action of Reservoir Water Fluctuations". Applied Mechanics and Materials 71-78 (luglio 2011): 4802–7. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.4802.
Testo completoAbstract (sommario):
Taking a landslide in the three gorges reservoir area as an example and considering the seepage field in different time periods with rise and fall of reservoir water level of the eight conditions, we use GEO-STUDIO / SEEP module to establish a seepage model and to calculate the distribution of seepage. The results showed that: the groundwater saturation line appears in the back-phenomenon during a certain range of slope in the rising water level, saturation line was concave shape, and with the rate of increase in water level increased and that concavity gradually increase; the groundwater saturation line appears in the downstream phenomenon during a certain range of slope in the drawdown water level, saturation line was convex shape, and with the rate of decline in water level increased and that convexity increases. The effective simulation studies of the greatly and cyclical fluctuations of water level under the slope seepage field has a certain reference meaning to the landslide control in the reservoir water level fluctuations about reservoir bank landslide.
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Arya, I. Wayan, I. Wayan Wiraga, I. G. A. G. Surya Negara, I. Nyoman Ramia e I. Made Wahyu Premana. "Rock slope stability analysis in Melasti Beach area – Ungasan, Bali". International research journal of engineering, IT & scientific research 9, n. 3 (18 maggio 2023): 82–90. http://dx.doi.org/10.21744/irjeis.v9n3.2319.
Testo completoAbstract (sommario):
Melasti Beach is one of the main tourist attractions developed by the Bali Government. This beach is located in the southern area of Bali, precisely in Ungasan village, Badung Regency, Bali. At the moment, the region administrator is constructing a tourism facility by excavating a rock mass near the beach. Therefore, to avoid damage to nearby shops and beach facilities, a study is needed to be conducted about the safety of the rock mass that is being excavated. Direct observation of the rock mass and rock mass classification is conducted to obtain the physic and mechanical characteristics of the rock. To do the stability analysis of the slope, Geo-Studio 2012 software is used by inputting the data obtained from the field and laboratory data. The result of this study is a mass rock in Melasti Beach is classified as limestone which has a Fair rock classification and the factor of the safety of the rock slope/cliff is 1.631 which means the cliff is safe and is no need to build an extra reinforcement on the slope/cliff.
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Yu, Wei Wei, Xiao Qin Guan, Yi Hui Li e Hang Lin. "Boundary Effect to the Safety Factor of Slope in Geo-Material". Advanced Materials Research 382 (novembre 2011): 84–87. http://dx.doi.org/10.4028/www.scientific.net/amr.382.84.
Testo completoAbstract (sommario):
Boundary conditions have great impact on the stability of three dimensional geo-material, like slope, which is one of the oldest applications in geotechnical engineering. In order to analyze the impact of boundary condition to factor of safety of slope, the 3D stability analysis was then extended to the “rough-smooth” and “smooth-smooth” boundary. By studying slopes with the same geometric condition and shear strength parameters, the results show that the safety factors obtained from “rough-smooth” boundary are smaller than those got from “rough-smooth” boundary and bigger than those got from “smooth-smooth” boundary. The study also indicates that when the width to height ratio (W/H) of homogeneous symmetric slope satisfies certain condition, the “rough-rough” boundary equals to the “rough-smooth” boundary. The factor of safety and shape of slip surface got from these two kinds of boundary condition are of the same. Study results can give guidance for the real practice.
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Sun, Yongshuai, Ke Yang, Ruilin Hu, Guihe Wang e Jianguo Lv. "Model Test and Numerical Simulation of Slope Instability Process Induced by Rainfall". Water 14, n. 24 (7 dicembre 2022): 3997. http://dx.doi.org/10.3390/w14243997.
Testo completoAbstract (sommario):
Due to rainfall infiltration, slope instability becomes frequent, which is the main reason for landslide disasters. In this study, the stability of slope affected by rainfall was analyzed using an indoor model test and geo-studio simulation method, and the variation law of phreatic line, seepage field, the most dangerous sliding surface, and safety factor with time were studied under rainfall infiltration. Research results showed that under the effect of rainfall, the slope failure presented a typical traction development mode. With the increase of time, the phreatic line of the slope kept rising, the water head keeps increasing, the seepage depth in the slope became deeper, and the slope stability worsened until the slope was damaged. The water head height decreased gradually from the slope left boundary to the right, and the water head width decreased gradually. The soil at the slope back edge was damaged, and the sliding soil accumulated at the slope foot, forming a gentle slope, which increased the shear strength of the slope, making the slope finally reach a stable state. In this process, the overlying soil changed from an unsaturated state to a saturated state, the pore water pressure and soil pressure increased, and then the slope was damaged, both of which decreased. Under high rainfall intensity, the slope was damaged, the soil in the slope was rapidly saturated, and the time required to produce the sliding area was short. When the rainfall intensity was the same, the smaller the slope angle was, the smaller the safety factor was. When the slope angle was the same, the greater the rainfall intensity was, the smaller the safety factor was.
38
Tan, Mengxi, e Sai K. Vanapalli. "Performance estimation of a shallow foundation on an unsaturated expansive soil slope subjected to rainfall infiltration". MATEC Web of Conferences 337 (2021): 03009. http://dx.doi.org/10.1051/matecconf/202133703009.
Testo completoAbstract (sommario):
In the last two decades, there has been a significant increase in infrastructure development on slopes of hilly regions of the world, due to population growth. There are many infrastructures on unsaturated expansive slopes, especially in semi-arid and arid regions. Rainfall infiltration is one of the major factors that contributes to the slope and infrastructure foundations failures on hilly slopes with unsaturated expansive soils. In the current study, a rational approach is proposed considering the combined influence of the foundation-slope behavior based on the principles of unsaturated soil mechanics. This is achieved by a novel numerical modelling approach using the commercial software Geo-studio to investigate the performance of strip foundation located on the top of the unsaturated expansive soil slope subjected to various rainfall infiltration conditions. Hydro-mechanical coupling analysis is conducted to evaluate the rainfall water infiltration influence combined with slope stability analysis using limit equilibrium method. Comparisons are made between both the foundation bearing capacity, slope stability before and after rainfall water infiltration. Different failure mechanisms of the foundation and slope system are presented with and without foundation loading for various rainfall scenarios. Results summarized in this paper are helpful for the geotechnical engineers for understanding the performance of shallow foundations on unsaturated expansive soil slopes considering the influence of rainfall infiltration conditions.
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Wang, Dong, Chun Lei Feng e Zi Chun Mao. "Simulation and Analysis of the Failure for the Water Stop Curtain of Building Pit in Round Gravel Level". Applied Mechanics and Materials 723 (gennaio 2015): 326–29. http://dx.doi.org/10.4028/www.scientific.net/amm.723.326.
Testo completoAbstract (sommario):
The failure of the water stop curtain is a hot engineering problem which is usually seen in deep building pit constriction. In this paper, the SEEP/W module in Geo-Studio is adopted to simulate and analyze the failure of the water stop curtain and the geological condition in a certain project. The curtain defect existed in the round gravel level and its effect on the filtration is also studied. Finally, the strategies for controlling the quality of the water stop curtain are summarized.
40
He, Yuqiong, Bo Li e Xuan Du. "Soil Slope Instability Mechanism and Treatment Measures under Rainfall—A Case Study of a Slope in Yunda Road". Sustainability 15, n. 2 (10 gennaio 2023): 1287. http://dx.doi.org/10.3390/su15021287.
Testo completoAbstract (sommario):
The unique geological conditions in Yunnan make it likely for landslides to occur there. For the purpose of exploring the soil slope instability mechanism, this paper takes a slope in Yunda Road, Chenggong, Kunming, as case study and establishes a slope model utilizing FLAC 3D coupled with Geo-studio software. The displacement, strain and deformation rate of the slope under the condition of rainfall are simulated, and the influence of rainfall and rainfall duration on rainfall infiltration is analyzed. The results indicated the following: (1) The effective stress on and shear strength of slope soil at the foot of the slope gradually decreased under rainfall, resulting in the loosening of the slope soil and slip at the foot of the slope. This affected the stability of the upper slope which, in turn, reduced the stability of the whole slope; (2) When the duration of rainfall reached 72 h, the slope stability coefficient Fs = 0.88, indicating a failure state. The increments of principal stress and shear stress at the foot of the slope were the largest, and the strain speed was the fastest, with the maximum values of principal stress and shear stress reaching 0.412 and 0.579, respectively; (3) The maximum total displacement was 2.177 m at the foot of the slope, the maximum vertical Z-axis displacement was 1.673 m in the negative direction of the Z-axis, and the soil at the foot of the slope was 0.6 m in the positive direction of the Z-axis. Our simulation results were consistent with the actual failure of the slope. After analyzing the slope mechanism and adopting targeted treatment measures, the slope was subjected to four rainfall cycles without any sign of landslips, indicating that the effect of our interventions was favorable.
41
刘, 恒材. "Study on Stability of East Side Slope of Shengli East No. 2 Mine Based on Geo-Studio Numerical Software". Advances in Geosciences 10, n. 07 (2020): 622–28. http://dx.doi.org/10.12677/ag.2020.107061.
Testo completo
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Ismawan, Nindia Rizky, Eko Andi Suryo e Arief Rachmansyah. "An Analysis of Critical Slopes Stability in Bendosari Village, Pujon, Malang Due to The Effect of Rainwater Infiltration". Rekayasa Sipil 16, n. 1 (12 maggio 2022): 48–52. http://dx.doi.org/10.21776/ub.rekayasasipil.2022.016.01.7.
Testo completoAbstract (sommario):
A disaster is an incident which threatens and disrupts life. This research was purposed to determine the critical slope stability in Bendosari Village, Pujon due to rainwater infiltration. This research was conducted through ground laboratory test to investigate the type and characteristic of the soil, which then followed by testing of the geo-electric and topography to investigate the existing condition and the ground water level on the critical slopes and analyzed safety factor (SF) using SLOPE/ W for slope with rainwater infiltration effect. The analysis results proved that rainwater infiltration in both conditions could reduce the SF (Safety Factor) value. This is because the water content in the soil increased the pore water pressure. In addition, high water content in the soil reduced the soil shear strength
43
Yan, Tiesheng, Jun Xiong, Longjian Ye, Jiajun Gao e Hui Xu. "Field Investigation and Finite Element Analysis of Landslide-Triggering Factors of a Cut Slope Composed of Granite Residual Soil: A Case Study of Chongtou Town, Lishui City, China". Sustainability 15, n. 8 (21 aprile 2023): 6999. http://dx.doi.org/10.3390/su15086999.
Testo completoAbstract (sommario):
Landslides caused by excavations and precipitation events are widespread types of slope failures in southwest Zhejiang, China, in areas with granite residual soil. Investigations of the effect of high precipitation on the hydrological response, stability, and evolutionary mechanism of cut slopes in granite soil areas are lacking. The characteristics of historical landslides in Chongtou Town in southwestern Zhejiang were summarized, and a typical slope was selected for analysis. The hydraulic and mechanical properties of the residual soil and fully weathered granite were tested, and the surface displacements on the slope were monitored. Geo-studio was utilized to establish a coupled seepage-deformation model to validate the numerical method and investigate the landslide-triggering factors of the cut slope. The results showed nearly all historical landslides in Chongtou Town were triggered by precipitation events, and the slide bodies consisted of residual soil and fully weathered granite with similar geotechnical properties. The simulated and measured horizontal displacements were in good agreement, indicating the reliability of the established model and parameters. The stability coefficient decreased with an increase in the gradient or height of the cut slope. The critical height values were 5.3 m, 5.5 m, 5.7 m, 6.0 m, and 6.3 m at slopes of 60°, 65°, 70°, 75°, and 80°, respectively. Long-term torrential rain and short-term high-intensity precipitation events are likely to trigger landslides when the precipitation event lasts longer than 26 h and 78 h, respectively. The landslide formation includes four stages: slope evolution, formation of unloading zone at slope foot, migration and loss of soil particles, and instability of the cut slope. The findings can be used to prevent and manage landslides on cut slopes in areas with granite residual soil.
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Jayed Zedan, Adnan, Mariwan Ridha Faris e Ahmed Amer Abdulsattar. "Slope Stability of an Earth Dam during Drawdown Conditions (KHASA-CHAI Dam) as a Case Study". International Journal of Engineering & Technology 7, n. 4.37 (13 dicembre 2018): 17. http://dx.doi.org/10.14419/ijet.v7i4.37.23605.
Testo completoAbstract (sommario):
Aiming in this research was to have a clear view about the behavior of Khasa-Chai Dam during the draw down action taking into consideration the newly built of this dam which was filling during the time of this article, the upstream slope was investigated by taking drawdown of the water from the reservoir. This dam is consists of the zoned embankment with a total length of (2.36 km) with an upstream slope (1v:3h) and downstream slope (1v:2h). Slope stability was investigated during the drawdown of the water from the reservoir by considering the water in the reservoir to be at maximum water level and by taking two cases during the rapid and slow drawdown. SLOPE/W which is a sub program from Geo-Slope software was used in association with SEEP/W software to find the factor of safety of the upstream slip surface during the drawdown conditions. It was noticed from the drawdown conditions that the phreatic line falls almost at the same position for both cases. Also for both cases the factor of safety of the upstream slip surface falls above the value of (1.0) and that is mean the upstream slope is in a safe condition when the water drawdown. The exit gradient and the rate of flow at the downstream face decrease with time as the water in the reservoir drawdown which means the factor of safety against boiling increases with time.
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Wang, Lei, Yuequan Shang, Jun Zheng e Yingqiu Zhang. "Temporary Confined Water-Induced Landslide in the Binary Structure of a Gentle Slope: A Case Study of the Fanshantou Landslide". Water 13, n. 5 (25 febbraio 2021): 596. http://dx.doi.org/10.3390/w13050596.
Testo completoAbstract (sommario):
With the increase in rainfall, landslides occur on many gentle slopes in the mountainous areas of southeast China. Gentle slopes have a particular dual geological structure, i.e., the lower part is a gravel soil layer with good water permeability, and the surface layer is clay soil with relatively poor water permeability. Under conditions of heavy rainfall, a gentle slope with this structure is likely to collect temporary confined water. The intermittent creep of the upper slope is caused by the floating force of the temporary confined water, which causes landslide disasters. The conditions that bring about temporary confined water are related not only to the stratum structure, but also to the rainfall intensity and the initial height of the water table level. On the basis of the characteristics of the stratum of the gentle slope landslide on the front of Fanshantou Mountain, we constructed a hydrological model in GEO-STUDIO. We investigated the effect of different rainfall intensities and initial water table levels on confined water under continuous rainfall conditions and conducted a corresponding stability analysis. The results show that when both the initial water table level and the rainfall intensity are high, temporary confined water is formed rapidly, increasing the chance of a landslide disaster. The research results provide a theoretical basis for the treatment of landslides on similar gentle slopes in the mountainous areas of southeast China.
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Danoosh, Alaa Hu, e Maysam Th. Al-Hadidi. "Numerical simulation to the effect of applying rationing system on the stability of the Earth canal: Birmana canal in Iraq as a case study". Journal of the Mechanical Behavior of Materials 31, n. 1 (1 gennaio 2022): 729–38. http://dx.doi.org/10.1515/jmbm-2022-0216.
Testo completoAbstract (sommario):
Abstract Extreme conditions will cause the water level of high fill canal segment to change suddenly, which will affect the velocity and pore pressure of the slope. A 9 km irrigation earth canal in the city of Alsyahy, 15 km away from Al-Hilla city, and branching off from the left side of Shatt Al-Hilla at 57 km, was studied. The aim of this work is to study and analyze the effect of rationing system on the Birmana earthen canal during rapid drawdown case. Finite element modeling with Geo-Studio software was used in the present study to analyze the combined seepage and slope stability for three cycles. The resulting minimum safety factor obtained from the analysis using the saturated and unsaturated soil model was found to be 1.161, 1.142, 1.159, and 1.2 from the Janbu, Bishop, Morgenstern-Price, and Spencer methods, respectively. The factor of safety (FOS) values in three cycles are less than the required value. Finally, the FOC decreased by 66% from its value before the rationing system was applied, the area of canal and slip surface increased by 77 and 14%, respectively, due to the applied rationing system. These changes led to an irregular water distribution along the canal, in addition to a reduction in road width.
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Hussain, Ruqiya Abed, e Asmaa Al-samarrae. "Theoretical Analysis and Development of an Artificial Neural Network Model to Evaluate Earthen Dam Slope Stability". Tikrit Journal of Engineering Sciences 29, n. 4 (5 novembre 2022): 1–9. http://dx.doi.org/10.25130/tjes.29.4.1.
Testo completoAbstract (sommario):
In the design of earth dams, it must be considered that the water leakage through the earth dam generates upward and pore pressure, in addition to leakage forces that cause internal erosion, which has a direct influence on the structural stability of this system. Also, the rising and dropping in the water level has a direct effect on the stability of the dam's face slope. One way to solve these issues is the installation of a core or a horizontal water drainage system. The present study relied on the GEO-Studio computer tool to evaluate cross-sectional models of earthen dams by determining the safety factor under different situations represented by a change in filter type, and the flow state as a result of raising and lowering the water level at the dam reservoir and the full fill condition of the dam reservoir. The research found that the existence of a core substantially contributed to improving the safety coefficient for the case of rising the water level (2m) and rapidly rising by assigning it the greatest safety coefficient values. The absence of a filter had an opposite influence on the safety coefficient by decreasing it. Also, the factor of safety for the downstream slope was affected by less than 5% for different flow conditions, compared with the higher effect generated by the upstream slope. Furthermore, an artificial neural network model with an accuracy ratio of more than 97% was developed for the predicted safety factor.
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Pacheco, G. H. S., O. de Freitas Neto e R. N. F. Severo. "ANÁLISE DA ESTABILIDADE DAS FALÉSIAS DE TIBAU DO SUL POR MÉTODOS DE EQUILÍBRIO-LIMITE". HOLOS 2 (26 dicembre 2007): 78. http://dx.doi.org/10.15628/holos.2006.98.
Testo completoAbstract (sommario):
Um dos principais problemas da zona costeira é o avanço da linha de costa. Para analisar a estabilidade dos taludes que compõem essas linhas de costa no município de Tibau do Sul, RN, foi realizado este trabalho. Ele consiste em realizar simulações a respeito da estabilidade dos taludes através do cálculo do Fator de Segurança (valor adimensional que exprime a estabilidade do talude na sua situação mais crítica), utilizando métodos de equilíbrio limite pelo software SLOPE/W da GEO-SLOPE Versão Estudante. Foram realizadas simulações variando-se o grau de saturação do solo das falésias, a fim de se conhecer a influência da saturação na instabilização dos taludes, assim como obter o limite de saturação que as falésias suportam sem que haja ruptura. Também se obteve a provável superfície de ruptura em caso de instabilização. Pelos resultados pôde-se constatar que a saturação total do solo pode reduzir em até quatro vezes o valor do Fator de Segurança, acarretando deslizamentos de grande intensidade nas falésias em que não está presente a camada cimentada com óxido de ferro.
PALAVRAS-CHAVE: Estabilidade de Taludes, Falésias, Tibau do Sul-RN, Coesão, Ângulo de Atrito, Superfície de Ruptura, Fator de Segurança, SLOPE/W.
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Bračko, Tamara, Bojan Žlender e Primož Jelušič. "Implementation of Climate Change Effects on Slope Stability Analysis". Applied Sciences 12, n. 16 (16 agosto 2022): 8171. http://dx.doi.org/10.3390/app12168171.
Testo completoAbstract (sommario):
The objective of this study is to determine the impacts of expected climate change on slope stability. For this purpose, the case study of a slope instability, that was triggered in 2021 was selected. The stability analysis was performed considering the theory of rainfall infiltration and using Geo-Studio’s SEEP/W module for the surface infiltration model of the slope. A parametric stability analysis of the slope was conducted to determine the importance of climate change on slope stability. Conditions for changes in volumetric water content, water permeability, porewater pressure, and groundwater flow are important. When soil permeability is low, the factor of safety decreases during rainfall events and on the days following, while when permeability is higher, safety increases after rainfall events. The effect of lower cohesion is nearly linear, with the factor of safety decreasing by 0.1 for every 1 kPa less cohesion. The increase in net infiltration of water may be the most critical factor for slope instability. The results of the analysis indicate that timely reduction of water net infiltration through planting and proper surface water runoff from the upper road and slope would be a relatively simple and inexpensive measure compared to the cost of remediating the landslide, considering expected climate change. Therefore, it is advisable to analyze all slopes with respect to the expected climate change, taking into account the potential impacts of climate change.
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Ribeiro de Lima, José Branham, Isabelle De Melo Vicente e Júlio César Da Silva. "ESTUDO DA ESTABILIDADE DE TALUDES RODOVIÁRIOS DA BR-393". Revista Univap 22, n. 40 (9 febbraio 2017): 505. http://dx.doi.org/10.18066/revistaunivap.v22i40.1106.
Testo completoAbstract (sommario):
A geotecnia tem sido essencial para o avanço da expansão territorial, acessos rodoviários e ferroviários, portos e estruturas profundas como túneis e exploração de minérios. Sua influência e análise tem apresentado bons resultados no aprimoramento de obras mais seguras. O desenvolvimento de estudos e métodos em estabilidade permitem avaliar a resistência de taludes, culminando em uma melhor solução às rupturas causadas pelos fatores da natureza (chuvas orográficas, ciclônicas e convectivas). O avanço tecnológico e a implantação de ferramentas digitais, como o SLOPE/W da GEO-SLOPE, potencializaram os métodos de análise de estabilidade de taludes e os tornou rápidos e eficientes. Com isto, identificado o fator de segurança, com o apoio do software, referente a um talude rodoviário na BR-393, pôde-se determinar o fator de segurança associado e indicar o tipo de contenção que melhor se adaptasse, com rapidez e eficácia, minimizando os riscos de taludes rodoviários.