Study on Analysis of Deposits Highway Slope Stability and Treatment

2011 ◽  
Vol 105-107 ◽  
pp. 1245-1249
Author(s):  
Yi Fang Feng ◽  
Hua Zhi Zhang
Keyword(s):  
Numerical Simulation ◽  
Slope Stability ◽  
Reduction Method ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Deformation Characteristics ◽  
High Line ◽  
Geological Conditions ◽  
Deformation Features ◽  
Simulation Results

Taking Yangjiawuchang Bridge 2 Slope Project on the national key high line of Hangzhou to Lanzhou in China as example, the deformation characteristics of typical profile 4-4’ of the deposits highway slope project was studied by means of numerical simulation (FLAC3D). Based on the deformation fields, the slope deformation features were analyzed. According to the slope coefficient that was solved by strength reduction method, the slope stability was evaluated. In consideration of numerical simulation results and field geological conditions, the combination engineering treatments of surface drainage, paring-earthwork and unloading and slope temporary protection were selected. Moreover, the paring-earthwork areas were calculated and optimized. The simulation results can be based on to guide the engineering treatment, meanwhile, the results can provide reference for the similar engineering.

Analysis of Earth-Rockfill Dam Slope Stability by Strength Reduction Method Based on Nonlinear Strength

2011 ◽  
Vol 243-249 ◽  
pp. 2271-2275
Author(s):  
Shu Yu ◽  
Li Hong Chen ◽  
Ze Ping Xu ◽  
Ning Chen
Keyword(s):  
Shear Strength ◽  
Slope Stability ◽  
Reduction Method ◽  
Slip Surface ◽  
Strength Reduction ◽  
Strength Parameter ◽  
Strength Reduction Method ◽  
Critical Slip Surface ◽  
Rockfill Dam ◽  
The Earth

In the design process of the earth-rock dam, the slope stability problem was always focused on. The shear strength of rockfill in the earth-rock dam had strong nonlinear characteristics. The characteristic directly affected the factor of safety (FOS) of stability of dam slope and the determination of the critical slip surface. The shear strength parameter of rockfill was related to the minimum principal stress σ3 closely. And the value of σ3 had close relationship with the deformation characteristics of filling material and the process of dam filling etc. Strength reduction method has been widely used in solving the FOS of slope stability, and this method has the advantage on the searching of the critical slip surface. Combining the deformation and stress analysis of earth-rockfill dam filling process and the strength reduction method, this paper proposes a comprehensive method of dam slope stability analysis.

Numerical Simulation of Safe Distance between Concealed Karst Cave and Tunnel Based on Shear Strength Reduction Method Safety Factor Catastrophe

2014 ◽  
Vol 501-504 ◽  
pp. 1753-1756
Author(s):  
Yong Biao Lai ◽  
Mang Shu Wang ◽  
Xin Hua You
Keyword(s):  
Numerical Simulation ◽  
Safety Factor ◽  
Reduction Method ◽  
Strength Reduction ◽  
Karst Cave ◽  
Strength Reduction Method ◽  
Safe Distance ◽  
Shear Strength Reduction Method ◽  
Concealed Karst Cave ◽  
Shear Strength Reduction

The numerical simulation method of safe distance between concealed karst cave and tunnel based on shear strength reduction method safety factor catastrophe is proposed. The safety factor of different distance between concealed karst cave and tunnel can be obtained using strength reduction finite element method numerical calculation with the finite element solution non convergence as the standard rock damage, then compare the safety factor of different distance, the catastrophe of safety factor corresponding to the distance is the safe distance between concealed karst cave and tunnel, and the plastic zone of rock stratum between concealed karst cave and tunnel is reaching run-through state, which is verified by engineering example.

Static and Dynamic Stability Analysis on Artificial Rock Mass Slope Using Strength Reduction Method

2013 ◽  
Vol 368-370 ◽  
pp. 1774-1780
Author(s):  
Shi Yan ◽  
Hai Tao Du ◽  
Qi Le Yu ◽  
Han Yan
Keyword(s):  
Rock Mass ◽  
Stability Analysis ◽  
Slope Stability ◽  
Dynamic Stability ◽  
Rock Slope ◽  
Reduction Method ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Artificial Rock ◽  
Static And Dynamic Stability

This paper focuses on stability analysis of an artificial rock mass slope by a nonlinear finite element method (FEM). For a long time, rock slope stability problem is always an important research issue in the field of geotechnical engineering, which is related to human life and property safety as well as engineering security and efficiency. Therefore, the stability analysis and evaluation on rock slope is of great significance. The static and dynamic stability analysis on the artificial rock mass slope of WuAn power plant in China is carried on respectively in this paper by using the strength reduction method and FLAC3D software. In this analysis, static and dynamic instability criterions are enumerated, and the static and dynamic safety factors are calculated with the developed criterions of the displacement mutation, respectively. The analysis results show that the artificial rock mass slope is basically stable. It indicates that analyzing slope stability with strength reduction method is feasible.

Slope Stability Analysis Based on Strength Reduction Method FEM from the Perspective of Mechanics

2012 ◽  
Vol 424-425 ◽  
pp. 1187-1190
Author(s):  
Yue Zhai ◽  
Kun Long Yin
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Reduction Method ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Strength Reduction ◽  
Stability Factor ◽  
Strength Reduction Method ◽  
Equilibrium Method ◽  
Calculation Results

With the anti-shear parameters reduction, the nonlinear strength reduction FEM model of slope turns to unstable status and the numerical non-convergence occurs simultaneously. Hence, the safety stability factor obtained based on c-φ reduction algorithm can be regarded as equal to stability factor obtained using limit equilibrium method. In this paper, stability analysis of one reservoir slope is made and the calculation results show that the strength reduction method matches the traditional grid limit equilibrium method well, yet with much more available information. Efficient and accurate, the strength reduction FEM is feasible to examine slope stability and analyze slope movement patterns.

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