断层间距对隧道纵向稳定性的影响

Numerical modeling of influence of fault spacengel on longitudinal stability of tunnel

针对断层间距对隧道纵向稳定性的影响问题,采用FLAC3D计算模型分析应力及位移的分布规律。结果表明:断层间距越小,隧道纵向稳定性越差;断层间距不同,应力和位移纵向分布规律亦不同;顶板和边帮与断层相交区域为应力降低区,其前后为应力升高区,底板相反。

The attempt to investigate the influence of fault space on longitudinal stability entails the simulation of the stress and displacement distributing rules by the finite-difference program FLAC3D. The numerical results show that the smaller of the space of fault was, the poorer longitudinal stability of the tunnel was; the stress and displacement longitudinal distributing rules varied with fault space, and stressreducing region lies in the intersection region formed by roof, side and fault, with stress ascending regions lying before and behind the intersection region while the law of floor is opposite.