铁道科学与工程学报2017，Vol.14Issue(3)：585-592,8.
基于流固耦合的强度折减法研究地下水渗流对隧道稳定性的影响
The effect of groundwater seepage on stability of tunnel by using strength reduction method considering fluid solid coupling
摘要
Abstract
During the construction period of tunnels, groundwater seepage may lead to large deformation and even collapse of tunnel. To study the effect of groundwater seepage on stability of tunnel, the strength reduction method considering fluid solid coupling was employed to calculate safety factor of tunnel by using numerical simulation. Firstly, three working conditions were established to investigate the effect of groundwater seepage and calculation mode on safety factor of tunnel. Then the fluid solid indirect coupling mode was adopted to investigate the relationship between safety factor and groundwater level. Numerical results show that safety factor considering groundwater seepage is about 20% less than that without considering groundwater seepage. Numerical results of two calculation modes are almost identical, but the computational time of fluid solid indirect coupling mode is far less compared with that of fluid solid coupling mode. Safety factor of tunnel linearly decreases with the increase of groundwater level, with the slope of 0.26. Moreover, tunnel crown settlement increases with the increase of groundwater level when the strength reduction factor is equal. Groundwater seepage is unfavorable to control tunnel deformation. In the watery zone, groundwater level should be lowered to improve stability of tunnel on condition that it does not seriously affect surrounding environment.关键词
流固耦合/强度折减法/安全系数/地下水渗流Key words
fluid solid coupling/strength reduction method/safety factor/groundwater seepage分类
建筑与水利引用本文复制引用
李亚勇,张桂凤,靳晓光..基于流固耦合的强度折减法研究地下水渗流对隧道稳定性的影响[J].铁道科学与工程学报,2017,14(3):585-592,8.基金项目
国家自然科学基金资助项目(51578091) （51578091）
重庆市国土资源资助项目(KJ-2015028) （KJ-2015028）
