Systematic studies on the deformation and strength stability of a high slope at a hydroelectric project

WANG Cheng-hu; HE Man-chao; GUO Qi-liang

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Systematic studies on the deformation and strength stability of a high slope at a hydroelectric project

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- Systematic studies on the deformation and strength stability of a high slope at a hydroelectric project
- Vol. 28, Issue S1, (2007)
- 作者机构：
  
  1. 中国地震局地壳应力研究所,北京,100085
  2. 中国矿业大学力学与建筑工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU433
- Online First：28 March 2014，
  
  Published：2007
- 稿件说明：
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WANG Cheng-hu, HE Man-chao, GUO Qi-liang. Systematic studies on the deformation and strength stability of a high slope at a hydroelectric project[J]. 2007, 28(S1).
DOI：

WANG Cheng-hu, HE Man-chao, GUO Qi-liang. Systematic studies on the deformation and strength stability of a high slope at a hydroelectric project[J]. 2007, 28(S1). DOI：

摘要

如何准确地研究水电站高边坡的稳定性问题一直是水电工程地质学者专家的研究热点。在此提出工程地质原型分析、离散元二维数值模拟和极限平衡法相结合的变形稳定性和强度稳定性的系统工程分析方法。以吉林台水电站坝址区高边坡BT20的稳定性问题为例，首先详细分析了该高边坡的工程地质特性，并利用工程地质定性分析法预测了该高边坡的最危险滑动面，然后利用离散元软件UDEC对高边坡的变形特征进行数值模拟分析，数值模拟结果与工程地质分析得到的结论十分吻合。确定了高边坡的危险滑动面就为后面的强度稳定性分析奠定了基础，采用Modified Sarma法计算了边坡在不同工况下的安全系数，敏感性分析结果表明地震作用和地下水位上升对边坡稳定性的威胁最大。

Abstract

How to solve the stability problem of a hydroelectric project has always attracted much attention of engineering geologists. In this paper

a systematic analytical method for the stability evaluation of a high slope is put forward

including engineering geology model establishment

2-D numerical modeling with distinct element method and limit equilibrium method. This paper has the high slope of BT20 at the dam location area of Jinlingtai hydroelectric plant as the research case. At first

the engineering geological characteristics of the high slope is analyzed in detail

and one engineering geological model is established; secondly

the software UDEC is used to analyze the deformation characteristics of the high slope to determine the critical sliding surface

and the results accord with those conclusions based on the engineering geological analysis; finally the Modified Sarma method is adopted to calculate the safety factors of the slope under different engineering conditions. The sensitivity analysis shows that seismic actions and rise of underground water level have most dangers to the stability of the slope.

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