scholarly journals Slope Stability Analysis of Earth-Rockfill Dams Using MGA and UST

2015 ◽  
Vol 2015 ◽  
pp. 1-10
Author(s):  
Li Nansheng ◽  
Tang Bo ◽  
Xie Lihui
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Shear Failure ◽  
Slip Surface ◽  
Nonlinear Behavior ◽  
Failure Criteria ◽  
Slope Stability Analysis ◽  
Matlab Toolbox ◽  
Unified Strength Theory

The nonlinear Unified Strength Theory (UST), which takes into account the effect of intermediate stress and nonlinear behavior on geotechnical strength, is applied in slope stability analysis of earth-rockfill dams (ERD) in this paper. The biggest drawback for general determination of slip surface is that it must presuppose the shape of slip surface and is unable to identify the critical noncircular slip surface more accurately. This paper proposes an optimal analytic model of slope stability analysis of ERD and employs modified genetic algorithm (MGA) to search for the slip surface on the basis of shear failure criteria of the nonlinear UST without prior assumption of the shape of slip surface. The application of MGA dependent on Matlab toolbox to the slope stability analysis of ERD shows that MGA can consequently overcome the weakness of easily falling into local optimal solutions brought by general optimal algorithms.

scholarly journals On Slip Surface and Slope Stability Analysis

1975 ◽  
Vol 15 (3) ◽  
pp. 41-49 ◽  
Author(s):  
W.F. Chen ◽  
N. Snitbhan
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Slip Surface ◽  
Slope Stability Analysis

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.

scholarly journals Determination of Interslice Force in Slope Stability Analysis

1997 ◽  
Vol 37 (1) ◽  
pp. 65-72 ◽  
Author(s):  
Robert Y. Liang ◽  
Jihu Zhao ◽  
Stan Vitton
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Slope Stability Analysis

scholarly journals Slope Stability Analysis Based on Measured Strains along Soil Nails Using FBG Sensing Technology

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Hua-Fu Pei ◽  
Chao Li ◽  
Hong-Hu Zhu ◽  
Yu-Jie Wang
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Cross Section ◽  
Slip Surface ◽  
Axial Stress ◽  
Limit Equilibrium ◽  
Cost Effective ◽  
Slope Stability Analysis ◽  
Actual Condition ◽  
Soil Nails

In the past few decades, slope stability analysis using numerical methods is becoming a hot issue, but it is based on extremely ideal assumptions. Soil nailing technique, as one of the most cost-effective reinforcing methods, has already been widely used for reinforcing slopes. In this study, to evaluate the safety factor of a slope, the strains on soil nails were measured by fiber Bragg grating (FBG) sensor. Strains along soil nails in the same cross section of a slope can be computed using the measured wavelength shifts of FBG sensors. In order to evaluate the stability of a slope, an optimal model was proposed to search the potential slip surfaces based on measured strain values. Maximum sum of strains on soil nails at different elevations of the same cross section was taken as the objective. Positions of soil nails, circular slip surface, and boundary conditions of the soil nails were summarized and taken as constraints. Finally, safety factors can be computed using the searched slip surface regarding the axial stress of soil nails. This method combines the limit equilibrium methods with measured axial strains on site which can reflect the actual condition of field slopes.

scholarly journals Determination of Residual Strength of Soils for Slope Stability Analysis: State of the Art Review

2020 ◽  
Vol 8 (0) ◽  
pp. 46-57
Author(s):  
Chen Fang ◽  
Hideyoshi Shimizu ◽  
Tatsuro Nishiyama ◽  
Shin-Ichi Nishimura
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Residual Strength ◽  
State Of The Art ◽  
Slope Stability Analysis
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