Study on Deformation and Stability of High Slope with Weak Intercalated Layers

2012 ◽  
Vol 204-208 ◽  
pp. 3142-3145
Author(s):  
Long Jiang ◽  
Jian Hui Sun ◽  
Wan Shun Wang
Keyword(s):  
Stability Analysis ◽  
Dynamic Equilibrium ◽  
Strength Reduction ◽  
Displacement Rate ◽  
Hydropower Station ◽  
High Slope ◽  
Stability Coefficient ◽  
Local Fluctuations ◽  
Stability Of Slope ◽  
Internal Deformation

The paper analyzed external deformation, deep deformation and stability of slope with weak intercalated layers in detail through field monitoring of Mayanpo slope at Xiangjiaba Hydropower Station. The results show that: ① Displacement deformation increases with time and decreases with increasing depth, and displacement rate decreases with time. ② Dislocation position exists in weak intercalated layers. Dislocation rate first increases and then decreases until basically stable, and local fluctuations are mainly affected by rainfall and dynamic equilibrium adjustment of the slope internal deformation. ③ Through stability analysis of Mayanpo slope by strength reduction FEM, stability coefficient is 1.72.

Study on Engineering Mechanical Properties of Mayanpo Slope at Xiangjiaba Hydropower Station

2012 ◽  
Vol 548 ◽  
pp. 511-515
Author(s):  
Jian Hui Sun ◽  
Long Jiang ◽  
Wan Shun Wang ◽  
Chen Lin Xiong ◽  
Zhao Hui Zhu
Keyword(s):  
Mechanical Properties ◽  
Field Test ◽  
Dynamic Equilibrium ◽  
Three Dimensional ◽  
Strength Reduction ◽  
Hydropower Station ◽  
Weak Interlayer ◽  
Internal Deformation ◽  
Three Stages ◽  
Changing Rate

Through the field test of Mayanpo slope at Xiangjiaba Hydropower Station, external deformation, deep deformation, groundwater level and stability of the slope with weak interlayer are analyzed in this paper. The results show that: ① displacement deformation increases with time and decreases with increasing depth. Changes of displacement can be divided into three stages: deformation rapidly increases in the early, and slowly increases in the medium, and becomes gradually stable in the later. Changing rate of displacement decreases with time, and the rate can also be divided into three stages, basically consistent with the displacement changing stage; ② a certain thickness of weak interlayer and evident dislocation exists in slope strata. Dislocation rate first increases and then decreases until basically stable, and local fluctuation is mainly affected by rainfall and dynamic equilibrium adjustment of the slope internal deformation; ③based on the penalty function contact of pile soil and the surface of rock mass, the three-dimensional numerical model of coupling of seepage and strain has been established, and through analyzing and comparing with field test data, it is verified that the model is feasible in the study on slope deformation; ④ through stability analysis of Mayanpo slope by strength reduction FEM, stability coefficient is 1.72.

Stability Analysis on High Slope Based on Strength Reduction Method

2014 ◽  
Vol 505-506 ◽  
pp. 234-238
Author(s):  
Bao Jin Ge ◽  
Lian Jun Wang ◽  
Dan Feng Li ◽  
Yi Li
Keyword(s):  
Plastic Deformation ◽  
Stability Analysis ◽  
Reduction Method ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
High Slope ◽  
Analysis And Evaluation ◽  
Stability Of Slope ◽  
The Stability ◽  
Abaqus Software

The stability analysis and evaluation on high slope is of great significance. The stability analysis on the slope of ZHANG-ZHUO highway is carried on in this paper by using the strength reduction method and ABAQUS software. According to the stress and plastic deformation calculated by ABAQUS software, the paper gives evaluations for the stability of slope. It turns out that safety factor of the slope is greater than three; the stability of the slope is well.

Application of Sliding Block Computation Model in Stability Evaluation for Anchored Rockmass Slope

2006 ◽  
Vol 306-308 ◽  
pp. 1515-0
Author(s):  
Qiang Yong Zhang ◽  
X.T. Zhang ◽  
W. Xiang
Keyword(s):  
Stability Analysis ◽  
Computational Model ◽  
Engineering Design ◽  
Underground Water ◽  
Hydropower Station ◽  
Stability Evaluation ◽  
Computation Model ◽  
Rock Bolts ◽  
High Slope ◽  
Supporting Effect

Based on the basic idea of Sara method, A sliding block computational model for the anchored slope is established in this paper after taking into consideration the action of earthquake and influence of underground water as well as the supporting effect of rock-bolts . This model has been applied to stability analysis for the high slope project of a hydropower station and conclusions of significance to engineering design has been got.

The Analysis of Loess High Embankment Stable Question by the Strength Reduction FEM

2011 ◽  
Vol 243-249 ◽  
pp. 2997-3000
Author(s):  
Li Ping Zhang ◽  
Chao Liu
Keyword(s):  
Stability Analysis ◽  
Highway Construction ◽  
Strength Reduction ◽  
Research Topics ◽  
Stress Strain ◽  
Stability Coefficient ◽  
Loess Area ◽  
Model Research ◽  
Development Change ◽  
Embankment Stability

The slope of loess high embankment stability analysis is in northwest loess area highway construction important question, also is in the crag earth project discipline one of most ancient model research topics. This article folds the subtraction analysis loess high embankment stable question with the strength reduction FEM, not only can direct—viewing see the soil body stress strain the development change, moreover may obtain the slope and stability the coefficient. This article folds the subtraction obtained stability coefficient with the strength reduction FEM to be smaller than the bishop law obtained stability coefficient.

scholarly journals Stability Analysis of Jointed Rock Slope by Strength Reduction Technique considering Ubiquitous Joint Model

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Ruili Lu ◽  
Wei Wei ◽  
Kaiwei Shang ◽  
Xiangyang Jing
Keyword(s):  
Rock Slope ◽  
Reduction Method ◽  
Domain Size ◽  
Jointed Rock ◽  
Strength Reduction ◽  
Hydropower Station ◽  
Strength Reduction Method ◽  
Vertical Side ◽  
The Stability ◽  
Jointed Rock Slope

In order to study the failure mechanism and assess the stability of the inlet slope of the outlet structure of Lianghekou Hydropower station, the strength reduction method considering the ubiquitous joint model is proposed. Firstly, two-dimension numerical models are built to investigate the influence of the dilation angle of ubiquitous joints, mesh discretization, and solution domain size on the slope stability. It is found that the factor of safety is insensitive to the dilation angle of ubiquitous joints and the solution domain size but sensitive to the mesh discretization when the number of elements less than a certain threshold. Then, a complex three-dimension numerical model is built to assess the stability of the inlet slope of the outlet structure of Lianghekou Hydropower station. During the strength reduction procedure, the progressive failure process and the final failure surface of the slope are obtained. Furthermore, the comparison of factors of safety obtained from strength reduction method and analytical solutions indicates that the effect of vertical side boundaries plays an important role in the stability of jointed rock slope, and the cohesive force is the main contribution to the resistant force of vertical side boundaries.

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