Subgrade Stability Analysis with Rainfall Infiltration

2012 ◽  
Vol 204-208 ◽  
pp. 284-288
Author(s):  
Li Jin Zhou
Keyword(s):  
Stability Analysis ◽  
Rainfall Intensity ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Matric Suction ◽  
Rainfall Infiltration ◽  
Soil Permeability ◽  
Safety Coefficient ◽  
Equilibrium Method

Based on limit equilibrium method, the subgrade stability formula under rainfall infiltration is derived and the influence of matric suction on subgrade stability is analyzed using the safety coefficient formula. What’s more, the affection of rainfall intensity, duration and soil permeability on subgrade stability is studied and the influences is obtained. The presented research provides the theory basis to controlling of rainfall infiltration.

Study of the Effects of Rainfall Infiltration on Stability of Geocell Protection of Slope

2011 ◽  
Vol 90-93 ◽  
pp. 2716-2721
Author(s):  
Guang Yue Wang ◽  
Yan Han
Keyword(s):  
Stability Analysis ◽  
Failure Mode ◽  
Shear Failure ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Rainfall Infiltration ◽  
Protection System ◽  
Analysis Model ◽  
New Approach ◽  
Equilibrium Method

Geocell protection of slope was influenced by environment and climates largely. Many of them came to failure when subjected to rainfall infiltration. Aiming at the general shear failure mode of the geocell-protection-system (GPS), its stability analysis model during rainfall was established by the limit equilibrium method. A new approach of evaluating stability of the GPS was proposed.

scholarly journals Stability Analysis of 3D Geonet Slope Protection System in Rainfall

2016 ◽  
Vol 10 (1) ◽  
pp. 105-113
Author(s):  
Guangyue Wang ◽  
Xinlei Shan ◽  
Chuanwen Tu
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Rainfall Intensity ◽  
Limit Equilibrium ◽  
Research Result ◽  
Slope Angle ◽  
Limit Equilibrium Method ◽  
Rainfall Infiltration ◽  
Analysis Model ◽  
Slope Length

Slope protection with 3D geonet is an economic, convenient and eco-friendly technique; and it is increasingly used in practical projects. However, 3D geonet is sensitive to the ambient environment; and it might lose its stability due to rainfall infiltration. In this paper, the overall instability failure of the 3D geonet system under rainfall infiltration is analyzed. By adopting the limit equilibrium method, a slope stability analysis model is established; and the influence of slope angle, rivet space, slope length, rainfall intensity on stability are analyzed, and a formula for calculation of design optimization of rivet space is obtained. The research result would provide technical support for the design and stability analysis of slope protection with 3D geonet.

Slope Stability Analysis of Elastic Limit Equilibrium Method

2013 ◽  
Vol 275-277 ◽  
pp. 1423-1426
Author(s):  
Lin Kuang ◽  
Ai Zhong Lv ◽  
Yu Zhou
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Safety Factor ◽  
Slip Surface ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Slope Stability Analysis ◽  
Sliding Surface ◽  
Tangential Stresses ◽  
Equilibrium Method

Based on finite element analysis software ANSYS, slope stability analysis is carried out by Elastic limiting equilibrium method proposed in this paper. A series of sliding surface of the slope can be assumed firstly, and then stress field along the sliding surface is analyzed as the slope is in elastic state. The normal and tangential stresses along each sliding surface can be obtained, respectively. Then the safety factor for each slip surface can be calculated, the slip surface which the safety factor is smallest is the most dangerous sliding surface. This method is different from the previous limit equilibrium method. For the previous limit equilibrium method, the normal and tangential stresses along the sliding surface are calculated based on many assumptions. While, the limit equilibrium method proposed in this paper has fewer assumptions and clear physical meaning.

The Block Spring Model for Slope Stability Analysis (BSM)

2013 ◽  
Vol 671-674 ◽  
pp. 311-314
Author(s):  
Jing Ma ◽  
Wen Sheng Chen ◽  
Zhen Li
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Slope Stability Analysis ◽  
Spring Model ◽  
Equilibrium Method ◽  
Proposed Model ◽  
Reasonable Result ◽  
Reasonable Model

Many methods have been used for slope stability analysis in recent years. Limit equilibrium method is more popular than others, but its model is very simple. This paper gives a more reasonable model and develops a program by VC++ . A reasonable result is obtained with the proposed model.

scholarly journals Stability Analysis of Anchored Soil Slope Based on Finite Element Limit Equilibrium Method

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Rui Zhang ◽  
Jie Zhao ◽  
Guixuan Wang
Keyword(s):  
Finite Element ◽  
Stability Analysis ◽  
Safety Factor ◽  
Slip Surface ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Element Analysis ◽  
Surface Anchoring ◽  
Equilibrium Method ◽  
Slice Method

Under the condition of the plane strain, finite element limit equilibrium method is used to study some key problems of stability analysis for anchored slope. The definition of safe factor in slices method is generalized into FEM. The “true” stress field in the whole structure can be obtained by elastic-plastic finite element analysis. Then, the optimal search for the most dangerous sliding surface with Hooke-Jeeves optimized searching method is introduced. Three cases of stability analysis of natural slope, anchored slope with seepage, and excavation anchored slope are conducted. The differences in safety factor quantity, shape and location of slip surface, anchoring effect among slices method, finite element strength reduction method (SRM), and finite element limit equilibrium method are comparatively analyzed. The results show that the safety factor given by the FEM is greater and the unfavorable slip surface is deeper than that by the slice method. The finite element limit equilibrium method has high calculation accuracy, and to some extent the slice method underestimates the effect of anchor, and the effect of anchor is overrated in the SRM.

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