Fluid-solid Coupling Numerical Simulation for Tunnel in Fracture Zone Baesd on 2D-FLAC Software
To understand the stressed characteristic of fault rupture zone under high hydraulic pressure,based on the F3 fault of Guanshan tunnel the software 2D-FLAC is adopted to found the fluid-solid coupling numerical model of ground water seepage and evolution in the process of tunnel structure in fault rupture zone under high hydraulic pressure and analyze the mechanical character of tunnel structure in three schemes of whole block,free discharge and limit discharge.The result shows that in the whole block condition,the partial seepage of ground water happened and the lining thickness should be more than 60cm; Regardless of water pressure,the rock is damaged at a large range,and the minimum safety factor of the lining structure meet the tunnel design standard; In the limit discharge condition,the grouting reinforced ring makes the effect of limiting drainage and keeping the tunnels stability in the construction.The tunnel drainage gets smaller with the increase of grouting rings thickness and the decrease of grouting rings penetration parameter; setting the drainage system can decrease the hydraulic pressure at the back of lining as well as grouting and water blocking.
Numerical simulation High hydraulic pressure Fault rupture zone Fluid-solid coupling computing
Jinxing LAI Haobo FAN Fei ZHOU
School of Highway,Changan University,Xian,710064,P.R.China
国际会议
西安
英文
167-170
2012-06-12（万方平台首次上网日期，不代表论文的发表时间）