流固耦合作用下大溪1#隧道围岩变形研究

Research of Surrounding Rock Deformation of 1# Tunnel under Fluid Solid Interaction

为分析大溪1#水下隧道掘进过中流固耦合作用下围岩的变形,通过应用数值模拟软件FLAC3D模拟隧道掘进过程中围岩渗流的流固耦合机理,对比分析不考虑渗流条件下和考虑流固耦合作用下隧道围岩的位移和应力变化规律。结果表明:不考虑渗流场条件下隧道周边的位移和应力变化比考虑流固耦合作用的结果小很多,水下隧道耦合场作用对隧道围岩的应力场和渗流场的改变不容忽视。

In order to analyze the deformation of surrounding rock under the action of fluid solid coupling in the tunnelling 1# underwater tunnel, a numerical simulation software FLAC3D is used to simulate the fluid solid coupling mechanism of the surrounding rock seepage during tunnel excavation, and the displacement and stress variation of the surrounding rock under the interaction of flow and solid coupling under the seepage condition and the fluid solid coupling are not considered.. The results show that the displacement and stress changes around the tunnel under the seepage field are much smaller than that of the fluid and solid coupling. The change of the stress field and the seepage field of the tunnel surrounding rock can not be ignored by the interaction of the underwater tunnel coupling field.