溪洛渡电站泄洪洞开挖变形数值模拟与监测分析  

Numerical simulation and monitoring analysis on excavation deformation of spillway tunnel section of Xiluodu Hydropower Station

作　　者：刘正树[1] 杨勇[1] 

机构地区：[1]中国水利水电第七工程局有限公司,四川成都611730

出　　处：《人民长江》2010年第9期45-48,100,共5页Yangtze River

摘　　要：介绍了溪洛渡水电站左岸泄洪洞无压段开挖支护施工方案。结合左岸泄洪洞无压段围岩物理力学参数、支护参数,利用phase2二维有限元分析软件对各开挖支护过程位移进行了数值模拟。模拟结果表明:地应力是引起位移的主要原因,地应力对位移的影响随开挖面的加大而不断重新分布并呈增大趋势。同时对施工期监测方案进行了介绍,对监测数据进行了分析。We introduce the construction schemes of excavation and support of free-flow spillway tunnel section in the left bank of Xiluodu Hydropower Station.In the combination of physico-mechanical parameters of surrounding rock mass at the free-flow spillway tunnel section and support parameters,a numerical simulation for the displacement of the surrounding rock mass in the excavation and support process is conducted by phase2 2-D finite element software.The simulation results show that geo-stress is the main cause of displacement,and the geo-stress redistributes and its influence increases with the increment of excavation area.The monitoring scheme in construction period is introduced and the data is analyzed as well.

关 键 词：泄洪洞 开挖支护 数值模拟 phase2 监测 溪洛渡水电站 

分 类 号：TV65[水利工程—水利水电工程]