阿海水电站导流洞围岩稳定性预测及反馈研究  

Stability Forecast and Study on the Feedback of the Surrounding Rocks in the Diversion Tunnel ofAhai Hydropower Station

作　　者：李天鹏[1] 张瑞[1] 

机构地区：[1]中国水电顾问集团昆明勘测设计研究院,云南昆明650051

出　　处：《云南水电技术》2008年第3期1-4,共4页

摘　　要：阿海水电站工程区主要为砂板岩互层状岩体，导流洞部分洞段围岩为相对较软的板岩及具有各项异性的砂板岩互层状岩体。洞室开挖后由于二次应力的分布有可能产生围岩变形，因此对导流洞的围岩稳定性的预测分析对工程具有重要的指导意义。本文利用围岩应变率及围岩单轴抗压强度两种围岩稳定性评价方法，以及对导流洞围岩应力及变形进行有限元模拟分析，并结合施工后导流洞变形监测结果，对整个洞室围岩稳定性进行综合分析评价。The project area of the Ahai Hydropower Station is mainly with the rock mass of interbedded sandstone and slate. The surrounding rocks of parts of the diversion tunnel sections are the relatively soft slate and the interbedded rock mass of sandstone and slate with various heterogeneities. Because the secondary stress distribution after cavern excavation may cause surrounding rock deformation, therefore, the forecast and analysis on the stability of the surrounding rocks in the diversion tunnel have important instruction meaning for the project. This paper utilizes two surrounding rock stability evaluation methods, one related to strain rate and the other related to uniaxial compressive strength, to conduct the finite element simulation analysis, carry out the integrated analysis evaluation on the stability of the surrounding rocks of the diversion tunnel, according to the monitoring results of the diversion tunnel deformation after the construction.

关 键 词：导流洞 变形率 单轴抗压强度 稳定性 

分 类 号：TV7[水利工程—水利水电工程] TU457[建筑科学—岩土工程]