2D elastoplastic finite element analysis of sliding avalanche slope in navigation route of Longtan Hydropower Station

WANG Xuan; ZHANG Jia-sheng; LIU Xue-peng

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2D elastoplastic finite element analysis of sliding avalanche slope in navigation route of Longtan Hydropower Station

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- 2D elastoplastic finite element analysis of sliding avalanche slope in navigation route of Longtan Hydropower Station
- Vol. 28, Issue 5, (2007)
- 作者机构：
  
  1. 中南大学土木建筑学院,长沙,410075
  2. 中南水电勘测设计研究院,长沙,410014
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：10 September 2013，
  
  Published：2007
- 稿件说明：
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WANG Xuan, ZHANG Jia-sheng, LIU Xue-peng. 2D elastoplastic finite element analysis of sliding avalanche slope in navigation route of Longtan Hydropower Station[J]. 2007, 28(5).
DOI：

WANG Xuan, ZHANG Jia-sheng, LIU Xue-peng. 2D elastoplastic finite element analysis of sliding avalanche slope in navigation route of Longtan Hydropower Station[J]. 2007, 28(5). DOI：

摘要

基于弹塑性有限元（FEM）模型和Mohr-Coulomb屈服准则，采用平面有限元法对龙滩水电站航道1+016～ 1+080段座滑后边坡在开挖处理过程中的稳定性进行了数值模拟研究，分析了开挖中岩坡的应力场、位移场、塑性屈服区及支护效应。模拟结果表明，边坡在开挖过程中存在连续变形，局部出现塑性屈服，地下水位升降对边坡影响较大，但边坡整体仍处于稳定状态，开挖过程中有效的支护措施对改善边坡的稳定性至关重要。

Abstract

Based on elastoplastic finite element model and Mohr-Coulomb yielding criterion

2D FEM is applied to conduct numerical simulation research of stability of sliding avalanche slope during excavation in navigation route 1+016-1+080 of Longtan Hydropower Station; and the stress and displacement fields

plastic yielding area and effects of supporting system are analyzed. The results of simulation show that there appear continuous deformations during excavation and partly plastic yielding. The changes of groundwater level exert great influence on the slope; but the whole slope is still under stable condition. Meanwhile

the effective supporting measures are critical to improve the stability of slope during the excavation.

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