考虑应力-渗流耦合的水下地铁隧道稳定性分析

Stability Analysis of Considering Stress-seepage Coupling in Underwater Subway Tunnel

大连地铁海事大学试验线路过河段隧道,围岩条件较差,施工过程中易发生坍塌、涌水等灾害事故。对区间隧道穿越河段的稳定性进行的数值模拟分析表明,地下水的渗流作用对近海隧道的围岩变形有一定的影响,增加了围岩的应力、位移,从围岩-支护结构共同作用原理考虑,进行隧道支护结构设计是应该考虑多场耦合效应的。

Maritime University test line of Dalian Metro is under poor surrounding rock conditions,it is prone to cause collapse,gushing water and other disasters in the construction process. We have done the stability analysis in numerical simulation of tunnel crossing the river,the results show that the seepage has some influence on surrounding rock deformation of offshore tunnel,which increasing the stress and displacement of surrounding rock. From the viewpoint of surrounding rocksupporting structure interaction,it is reasonable to consider multi-field coupling effect when we design the tunnel support structure.