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西南某电站河床坝基开挖卸荷条件下变形破坏的数值分析
引用本文:杨根兰,黄润秋,林锋,吴琦.西南某电站河床坝基开挖卸荷条件下变形破坏的数值分析[J].力学学报,2007,15(3):356-361.
作者姓名:杨根兰  黄润秋  林锋  吴琦
作者单位:成都理工大学地质灾害防治与地质环境保护国家专业实验室,成都610059
基金项目:国家自然科学基金雅砻江水电开发联合研究基金重点资助项目(50539050)
摘    要:西南某电站河床坝基开挖过程中,在河床底部出现大量表征岩体卸荷的变形破坏现象。开挖卸荷深度与卸荷强度成为大坝建设及其长期稳定性的关键问题。采用三维有限差分程序FLAC3D,分析开挖卸荷条件下坝基岩体变形破坏特征。结合现场卸荷裂隙现象调查资料,综合确定出所研究的河床坝基开挖卸荷影响深度及强度。为坝基综合治理提供必要的参考信息,也为今后此类中等地应力边坡开挖卸荷分析储备可以借鉴的资料。

关 键 词:坝基开挖  卸荷  FLAC3D  变形  破坏
收稿时间:2006-03-23
修稿时间:2006-12-08

NUMERICAL ANALYSIS FOR DEFORMATION DAMAGE IN HYDROPOWER STATION DAM FOUNDATION DUE TO EXCAVATION IN SOUTHWEST CHINA
YANG Genlan,HUANG Runqiu,LIN Feng,WU Qi.NUMERICAL ANALYSIS FOR DEFORMATION DAMAGE IN HYDROPOWER STATION DAM FOUNDATION DUE TO EXCAVATION IN SOUTHWEST CHINA[J].chinese journal of theoretical and applied mechanics,2007,15(3):356-361.
Authors:YANG Genlan  HUANG Runqiu  LIN Feng  WU Qi
Institution:National Laboratory of Geohazards Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu610059
Abstract:Deformation damage due to excavation unloading is a common phenomenon.It was observed in the bottom of riverbed during the excavation of a hydropower station dam foundation in Southwest China.The depth and intension of excavation unloading and intension have become a key problem in dam construction and its longtime stability.The characteristics of deformation damage in dam foundation rock mass under condition of excavation unloading area are examined by using FLAC3D software.On the basis of the in-situ unloading fissure data,numerical analysis gives the affected depth and intensity of the riverbed dam foundation due to excavation unloading in the studied zone.This result can provide the necessary information for dam foundation integrative curing and can be use as reference data for the similar projects in the future.
Keywords:Dam foundation  Excavation  Unloading  FLAC3D  Deformation  damage
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