公路隧道围岩震动效应的解析法模拟

Analytical Numerical Simulation of Dynamic Effect of Highway Tunnel Rock

从节理岩体损伤力学的观点出发,根据节理裂隙的几何特征,计算其损伤张量,并将其引用到岩体的应力-应变的本构关系中,将隧道围岩考虑成为各向异性材料,进而将爆破地震波在隧道围岩中的传播问题转化为爆破地震波在各向异性材料中的传播问题,采用解析法能比较好地模拟应力波在隧道中的传播,能够比较好地接近实测结果,可以对于感兴趣的场点直接求出任意时刻的动力响应,但往往参数难以确定,会使得计算结果有所偏差,且只适应于爆源一定距离以外的弹性应力波传播的计算。

Use of the analytical method can approximate the analytical numerical simulation results to the observed results of field test, and can directly obtain the dynamical response at the arbitrary moment in the field points that we are interested in. But it is often difficult to determine the parameters, so that the calculated results may have some deviations. The analytical numerical simulation can only be applied to the calculation of stress waves at a certain distance from the blasting source.