Study on the Stability of Unsaturated Soil Slope Based on the Finite Element Strength Reduction Method

2015 ◽  
pp. 1117-1124 ◽  
Author(s):  
Wen-can Wang ◽  
Jun Feng ◽  
Xi-yong Wu ◽  
Qi-xiang Yang ◽  
Bao-long Zhu
Keyword(s):  
Finite Element ◽  
Unsaturated Soil ◽  
Reduction Method ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Soil Slope ◽  
The Stability

Research on the Law of the Infuence on Multilayer Slope Load to the the Different Gradient High Slope Stability

2012 ◽  
Vol 178-181 ◽  
pp. 1667-1671
Author(s):  
Jin Liang Wu ◽  
Yong Xing Zhang
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Reduction Method ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Analysis Software ◽  
Element Analysis ◽  
The Law ◽  
The Stability ◽  
Embankment Stability

In recent years, domestic superelevation embankment common occurance, This paper uses the finite element strength reduction method, analyzing the stability about high embankment and high embankment multilayer under multilayer load with large-scale finite element analysis software named ANSYS, it is researched on the law of the infuence on multilayer slope load to the the different gradient high embankment stability.

scholarly journals Structural Analysis of Backfill Highway Subgrade on the Lower Bearing Capacity Foundation Using the Finite Element Method

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Wenjuan Xu ◽  
Xin Huang ◽  
Jiandong Huang ◽  
Zhengjun Yang
Keyword(s):  
Finite Element ◽  
Slope Stability ◽  
Bearing Capacity ◽  
Reduction Method ◽  
Strength Reduction ◽  
Fe Model ◽  
Strength Reduction Method ◽  
Analysis Model ◽  
Reduction Coefficient ◽  
The Stability

The present study is to investigate the stability of the backfill subgrade on the lower bearing capacity foundation. A finite element (FE) model was constructed to simulate the high-filled road subjected to the actual self-weight load. The strength reduction method was adopted to establish an analysis model of slope stability. At the same time, the sensitivity analysis of the factors affecting the slope stability was carried out through parametric studies, including the elastic modulus, cohesion, internal friction angle, and slope rate. The results showed that the slope stability analysis model established by the strength reduction method can characterize the stability of the slope by calculating the slope safety coefficient. The mutation point of the relationship curve between the displacement generated in the slope and the reduction coefficient can be used as the criterion. Under the condition of a given strength reduction coefficient, the calculated results obtained through FE modeling can show the development of the equivalent plastic zone in the form of cloud diagrams.

The Influence of Cross Section Geometric Shape on the Slope Stability

2014 ◽  
Vol 1065-1069 ◽  
pp. 232-235
Author(s):  
Bao Long Zhang ◽  
Wen Fan
Keyword(s):  
Finite Element ◽  
Slope Stability ◽  
Cross Section ◽  
Reduction Method ◽  
Calculation Model ◽  
Strength Reduction ◽  
Geometric Shape ◽  
Strength Reduction Method ◽  
The Stability

The stability of the soil slop is influenced by many factors. In this paper, the influence of cross section geometric shape on the slope stability is analyzed by establishing a reasonable calculation model and using finite element strength reduction method. Results indicate that the slope stability of stepped excavation surface is higher than that of linear excavation surface, and the stability is better with larger and more platforms, the designers should make a choice in design by comparing cost and ease of construction. Slope table form also has affections, the stability of concave linear and convex slope type decreases in turn.

Soil Strength Reduction Method Induced by Variation of Water Content

2012 ◽  
Vol 170-173 ◽  
pp. 847-852
Author(s):  
Peng Ming Jiang ◽  
Zhong Lei Yan ◽  
Peng Li
Keyword(s):  
Slope Stability ◽  
Unsaturated Soil ◽  
Unsaturated Soils ◽  
Characteristic Curve ◽  
Strength Reduction ◽  
Actual State ◽  
Soil Slope ◽  
Simple Method ◽  
The Common ◽  
The Stability

As the complexity of unsaturated soil theory, and it must have a long test period when we study the unsaturated soils, so the conventional design analysis software does not provide such analysis, so we can imagine that such a slope stability analysis does not accurately reflect the actual state of the slope. Based on the known soil moisture content，this paper use the soil water characteristic curve and strength theory of unsaturated soil to calculate the strength reduction parameters of soil which can calculate the stability of the soil slope when using the common calculation method. It is noticeable that this method can be extended and applied if we establish regional databases for this simple method, and these databases can improve the accuracy of the calculation of slope stability.

scholarly journals Stability Analysis of Jointed Rock Slope by Strength Reduction Technique considering Ubiquitous Joint Model

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Ruili Lu ◽  
Wei Wei ◽  
Kaiwei Shang ◽  
Xiangyang Jing
Keyword(s):  
Rock Slope ◽  
Reduction Method ◽  
Domain Size ◽  
Jointed Rock ◽  
Strength Reduction ◽  
Hydropower Station ◽  
Strength Reduction Method ◽  
Vertical Side ◽  
The Stability ◽  
Jointed Rock Slope

In order to study the failure mechanism and assess the stability of the inlet slope of the outlet structure of Lianghekou Hydropower station, the strength reduction method considering the ubiquitous joint model is proposed. Firstly, two-dimension numerical models are built to investigate the influence of the dilation angle of ubiquitous joints, mesh discretization, and solution domain size on the slope stability. It is found that the factor of safety is insensitive to the dilation angle of ubiquitous joints and the solution domain size but sensitive to the mesh discretization when the number of elements less than a certain threshold. Then, a complex three-dimension numerical model is built to assess the stability of the inlet slope of the outlet structure of Lianghekou Hydropower station. During the strength reduction procedure, the progressive failure process and the final failure surface of the slope are obtained. Furthermore, the comparison of factors of safety obtained from strength reduction method and analytical solutions indicates that the effect of vertical side boundaries plays an important role in the stability of jointed rock slope, and the cohesive force is the main contribution to the resistant force of vertical side boundaries.

Failure Mechanism of a Slope Anti-Sliding Pile

2013 ◽  
Vol 639-640 ◽  
pp. 593-597
Author(s):  
Lin Chen ◽  
Yong Yao ◽  
Jiong Yang ◽  
Zhao Qiang Zhang
Keyword(s):  
Finite Element ◽  
Failure Mechanism ◽  
Reduction Method ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Analysis Method ◽  
Feasible Method ◽  
Finite Element Software ◽  
Slope Excavation ◽  
Pile Design

According to finite element strength reduction method，the article has discussed the failure mechanism of anti-sliding pile by using finite element software MIDAS /GTS ，exploration report and anti-sliding pile design data.The comparative analysis shows that the failure of anti-siding pile is contributed by the slope excavation and rainwater.The analysis method and results can provide reference significance to other anti-sliding pile design.This paper also provide a feasible method for prediction of consequence in slope excavation.

The Analyses on Mechanism and Mode of Instability of Loess Slopes under Surface Loading

2011 ◽  
Vol 243-249 ◽  
pp. 3067-3071
Author(s):  
Rong Jin Li ◽  
Rong Jian Li ◽  
Wen Zheng ◽  
Juan Fang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Loess Soil ◽  
Strength Reduction ◽  
Surface Load ◽  
Soil Slope ◽  
Surface Loading ◽  
Loess Area ◽  
Loess Slope ◽  
The Stability

The contribution of surface load to the stability of loess slope should be properly evaluated in order to meet the engineering demand in loess area. It is essential to analyze the stability of loess soil slope by means of the strength reduction finite element method instead of the slices method commonly used in practice so far. Firstly, some researches on stability of loess slope are reviewed. Then some different cases of the mechanism and mode of instability of a loess slope due to surface load are analyzed in this paper. Numerical results not only indicate that the safety factor of loess slope tends to change with the different distribution of the surface load, but also reveal that the distribution of surface load has important effect on the mode of instability of slope.

Stability Analysis of Dump Slope Based on FEM Strength Reduction Method

2014 ◽  
Vol 501-504 ◽  
pp. 51-55 ◽  
Author(s):  
Chao Peng ◽  
Dong Ji ◽  
Liang Zhao ◽  
Zhen Yu Qian ◽  
Fen Hua Ren
Keyword(s):  
Safety Factor ◽  
Reduction Method ◽  
Strength Reduction ◽  
Production Costs ◽  
Open Pit ◽  
Strength Reduction Method ◽  
Reduction Algorithm ◽  
Safety Factors ◽  
Dump Slope ◽  
The Stability

An analysis on safety factor of slope through c - φ reduction algorithm by finite elements method is presented. When the system reaches instability, the numerical non-convergence occurs simultaneously. The safety factor is then obtained by c φ reduction algorithm. This paper, which combines with the actual situation of Jinduicheng open pit mine, analysis the stability of the limit height of the dump based on strength reduction of finite element method. And the value of slope safety factor is 1.25 to 1.30. The results show that calculating safety factors of the slope by ANSYS is in full conformity with the basic requirement of safety. That means, the dump is stable, which can reduce the production costs and benefit the enterprise.

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