scholarly journals Comparing the limit equilibrium method and the numerical stress analysis method of tunnel face stability assessment

2012 ◽  
pp. 481-488 ◽  
Keyword(s):  
Stress Analysis ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Stability Assessment ◽  
Analysis Method ◽  
Tunnel Face ◽  
Face Stability ◽  
Equilibrium Method ◽  
Tunnel Face Stability

scholarly journals Relation of Limit Equilibrium Method to Limit Analysis Method

1991 ◽  
Vol 31 (4) ◽  
pp. 37-47 ◽  
Author(s):  
Meiketsu Enoki ◽  
Norio Yagi ◽  
Ryuichi Yatabe ◽  
Elzaburo Ichimoto
Keyword(s):  
Limit Analysis ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Analysis Method ◽  
Equilibrium Method ◽  
Limit Analysis Method

scholarly journals Limit Support Pressure of Tunnel Face in Multi-Layer Soils Below River Considering Water Pressure

2018 ◽  
Vol 10 (1) ◽  
pp. 932-939 ◽  
Author(s):  
Weiping Liu ◽  
Lina Hu ◽  
Yongxuan Yang ◽  
Mingfu Fu
Keyword(s):  
Numerical Method ◽  
Limit Equilibrium ◽  
Water Pressure ◽  
Earth Pressure ◽  
Limit Equilibrium Method ◽  
Support Pressure ◽  
Tunnel Face ◽  
Equilibrium Method ◽  
Tunnel Design ◽  
Design And Construction

AbstractThis paper presents a method to determine the limit support pressure of tunnel face in multi-layer soils below river considering the water pressure. The proposed method is based on the 3D Terzaghi earth pressure theory and the wedge theory considering the water pressure. The limit support pressures are investigated using the limit equilibrium method and compared to those calculated using a numerical method, such as FLAC3D. Four cases focusing different combinations of three layers are analyzed. The results obtained by the numerical method agree well with the predictions of the proposed limit equilibrium method. The limit support pressure obtained using the limit equilibrium method is greater than that obtained by the numerical method. The limit equilibrium method is safe and conservative in obtaining the limit support pressure. The proposed limit equilibrium method is expected to be easily adaptable and to enhance the reliability of tunnel design and construction in multi-layer soils below river.

Generalized Limit Equilibrium Method for Slope Stability Analysis

2012 ◽  
Vol 170-173 ◽  
pp. 557-568 ◽  
Author(s):  
Chuan Zhi Huang ◽  
Yong Hua Cao ◽  
Wan He Sun
Keyword(s):  
Slope Stability ◽  
Safety Factor ◽  
Limit Analysis ◽  
Limit Equilibrium ◽  
Soil Mass ◽  
Limit Equilibrium Method ◽  
Sliding Surface ◽  
Analysis Method ◽  
Equilibrium Method ◽  
Genuine Solution

On the basis of the limit equilibrium method and the physical significance of Coulomb’s yield criteria, extremum conditions of yield functions is established, which will be the fundamental equations for the limit analysis of soil mass. Once the stress equation along a sliding surface is available, the normal stress on the sliding surface can be obtained, a new limit analysis method, generalized limit equilibrium method (GLEM), can be established. With the generalized limit equilibrium method, an analysis method to solve the problem of slope stability can be obtained without introducing any other assumptions or simplified conditions but the sliding surface. With this algorithm, any discretionally possible sliding surface can be trial calculated and the least value of the calculated results of different sliding surfaces is taken as the safety factor. As long as a selected sliding surface is close to the true sliding surface, the derived safety factor will be approximate to the genuine solution to a problem of slope stability.

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