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Strength reduction finite element method in two tanggou Reservoir Slope Stability Analysis Application

Author: MaiHeMuTi·BaLaTi
Tutor: HuDan·TuMaErBai；WuBin
School: Xinjiang Agricultural University
Course: Agricultural Soil and Water Engineering
Keywords: Slope Stability Strength reduction finite element method Numerical Simulation Rigid body limit equilibrium method Two tanggou Reservoir
CLC: TU43
Type: Master's thesis
Year: 2010
Downloads: 119
Quote: 1
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Abstract


Hydraulic slope stability problem has been an important issue in our country is the world's landslide disaster more serious in the world. Along with the gradual implementation of the western development strategy, landslides must face constitutes a major construction engineering geological problems. Therefore, strengthening the landslide deformation and stability studies for the western development strategy to ensure the smooth implementation of great significance. In this paper, widely accessible and abroad computational analysis of rock and soil slope stability based on the literature to study two tanggou reservoir geological environment, the right bank of the reservoir for the further study of the geological environment landslide conditions, deformation and failure characteristics and stability of landslide factors, based on the right bank of the reservoir for two tanggou landslide stability analysis, slope stability analysis to establish a plastic finite element model, using Drucker-Prager yield criterion, as calculated using ANSYS software analysis tools. The main conclusions are as follows: a) to study two tanggou reservoir geological environment, the right bank of the reservoir for the further study of the geological environment landslide conditions, deformation and failure characteristics and influencing factors of slope stability based on the analogy through engineering mechanics and engineering geology means the right bank of the reservoir landslide potential failure modes and local unstable rock preliminary analysis showed that the slope sliding failure modes, locally by a number of groups formed by the combination of structural plane carve-shaped phenomenon rarely collapse of unstable blocks appears. 2) natural landslides and torrential rain in the gravitational effect of the stability of the landslide slope cutting transformed under the action of gravity and stability rainstorm comparison results show that the analysis of the slope resulting displacement, deformation, stress and strain are in line with the general rules displacement field shows the upper crest, faults and fault f130 f22 at the obvious. Stress and strain fields in a landslide in central and boundary faults in very significant concentration. Plastic strain at the boundary of the landslide and fault and fault f130 f22 concentrated at, especially under heavy rain landslide occurred at the fault obvious plastic strain, almost through. 3) the use of strength reduction finite element method to calculate the safety factor of the landslide, the results obtained, landslide under gravity in a stable state, but under heavy rain in a critical state to an unstable state development stage. After transformation landslide slope cutting processed under gravity in a stable state, heavy rains state landslide safety factor decreased, but also in a stable state. The results showed that torrential rains two tanggou Right Bank Landslide Stability Reservoir greater impact. 4) In order to improve simulation accuracy, this paper mainly on the strength reduction finite element method, finite difference method and limit equilibrium method in slope stability calculation and research applications to analyze and compare, received unanimous conclusion. Illustrates the application of this method to complex geological conditions of slope stability calculation is feasible.

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