摘要
锦屏二级水电站引水隧洞具有埋深大等复杂的地质情况,因此在已有隧洞的基础上开挖与之相交的主隧洞,主隧洞(特别是在交叉部处)围岩性质弱化并且围岩自身稳定性降低。因此结合高地应力区深埋隧洞工程,通过3D弹塑性有限元数值仿真模拟,并且通过模型试验,分析围岩在开挖中的应力释放及应力分布规律,为深埋隧洞交叉段监控量测系统的设计、施工方案优化及安全控制提供依据。
The complex geological condition including great depth will bring about many engineering problems in Jinping Ⅱ Hydropower Station , so excavation of an main tunnel which is intersected with a tunnel can weaken the quality of surrounding rock（expecially in intersectoin）. Considering deeply-rock , we analyzed the mechanical of stress release and redistribution in the surrounding rock using 3D elastic plasticity finite element numerical and model experiment , This study offers references for design of the monitoring system , construction scheme optimization , and safe control of deeply buried tunnels.
出处
《岩土工程技术》
2009年第5期242-245,250,共5页
Geotechnical Engineering Technique
关键词
交叉隧洞
有限元分析
模型试验
围岩稳定性分析
intersection tunnel
finite element numerical analysis
model experiment
the analysis of stability of surround- ing rock
