深覆盖高地应力水工隧洞围岩稳定及支护结构优化有限元分析

Norlinear Finite Element Analyses for Rock Stability and Supporting Structure Optimization of Divertion Tunnel in Deep and High Crustal Stress

结合工程实例,采用非线性有限元软件,对深埋高地应力花岗岩隧洞开挖及喷锚支护进行模拟计算,分析了施工期、运行期及检修期围岩稳定及支护结构内力,给出了施工期、运行期及检修期围岩变形及支护结构受力情况。对支护结构进行了优化计算,得出优化方式下,满足围岩稳定和支护结构的安全要求。

Combining with project cases, and using nolinear finite clement software, the analog computations are made for the excavation and shoring of the granite tuncl in deep and high crustal stress, the surrounding rock stability and inter- nal force of supporting structure in the time of construction, working and service are analyzed respectively, and the results of surrounding rock deformation and forcing of supporting structures in above working conditions are given. Meanwhile, the optimizing calculation of supporting structures is proceeded, and the safety requires for rock structure stability and supporting structures under optimization are obtained.