摘要
以南水北调西线工程深埋大直径无压引水隧洞为例,考虑高地应力及锚杆、衬砌等支护的动态作用,推导出隧洞围岩、衬砌应力及位移的表达式.经计算表明,一般在运行 5年后,隧洞衬砌及围岩稳定破坏基于流变的风险达到最大,并随围岩流变的稳定而趋于稳定,隧洞开挖后未及时衬砌的风险明显高于及时衬砌的情况.
Taking the deep buried free-flow large-diameter tunnel of the West Route Project of the South-North Water Transfer Project as an example, the expressions of stresses and displacement of the surrounding rock and liner are deduced considering the high-geostresses and the dynamic actions of the anchor rod and liner. Calculation results show that the stability failure risk based on the rheologic values of the tunnel liner and surrounding rock reaches the maximum after five years, and becomes more stable with the rehologic stability of the surrounding rock. The risk of a tunnel without liner in time is much higher than that with liner.
出处
《水利水运工程学报》
CSCD
北大核心
2005年第1期15-22,共8页
Hydro-Science and Engineering
基金
教育部科学技术研究重点项目资助(01099)
