深埋隧硐含水围岩弹塑性稳定极限平衡分析

The E-Plastic limit balanced analysis on wall rock containing water of deep tunnel

在岩体内开挖隧硐后,由于干扰了原岩应力分布和渗透水压力的作用,硐室含水围岩中呈现次生应力,这种新出现的不平衡应力是引起岩体产生变形、位移甚至破坏的主要根源 以圆形截面隧硐为例,在莫尔库仑理论的基础上,从围岩弹塑性变形的角度出发,分析和计算地下隧硐含水围岩极限平衡时的稳定性和临界支护抗力。

After digging tunnel in rock body,the wall rock containing water presents raw stress because the role has disturbed rock stress distribution and the infiltrative action of hydraulic pressure,the unbalanced stress is major source for producing warp,displacement and even destroyment.Taking circular section tunnel as an example,the stability of limit balance and critical support force of underground deep tunnel were analysed and calculated based on mohr-coulomb and elastic-plasticity theory.The theoretical foundation was established for actual underground project and support engineering.