节理化岩体复合式滑移破坏的模型试验研究

Model test research on multiple sliding failure of a jointed rock mass

针对节理化岩体的自身特点,提出沿岩体层面产生的应力集中以及层面与节理之间的残余完整岩桥破坏,将可能导致岩体产生复合式滑移破坏。在室内利用岩石三轴刚性伺服机,通过模型试验对岩体的层面和一组与层面正交的节理的情况进行模拟研究,分析了结构面性状和围压对复合式滑移破坏的影响,给出了在贯通性结构面(层面)倾角、非贯通性结构面的以及围压等因素共同作用下,节理化岩体发生复合式滑移破坏的条件以及破坏面特征。最后在与前人的试验资料进行对比分析的基础上得到可靠的结论,期望为在将来的实践工作中正确评估节理化岩体的破坏模式提供指导性意见。

According to specificities for jointed rock mass, multiple sliding failure of a jointed rock mass is presented, due to accumulation of stress along bedded plane of rock mass and destruction of remnant intact rock bridges between bedded planes and joints. And rock triaxial serve testing system is used, through model test involving bedded planes and a set of joint normal to the bedded planes in rock mass, effects of properties of joints and confining pressure on multiple sliding failure are analyzed; the cond...