论文部分内容阅读
拱坝坝肩岩体在断层、裂隙、层间剪切带等地质缺陷的作用下形成了不同规模的滑动块体,从而削弱了坝肩岩体的完整性,降低了坝肩岩体的承载能力,影响坝肩的稳定安全。为了分析坝肩滑动块体稳定性,以立洲拱坝工程为例,采用地质力学模型试验,分析两坝肩的地质构造及主要软弱结构面的产状发现,两坝肩存在四种潜在的滑动块体。在此基础上,通过地质力学模型超载法对坝肩岩体进行破坏试验,得到了滑动块体的失稳破坏机理、破坏形态及影响滑动块体稳定的控制因素,为解决类似工程问题提供了参考。
The abutment rock mass of arch dam forms sliding blocks with different scales under the action of geological defects such as faults, fissures and interlayer shear zones, so as to weaken the integrity of the abutment rock mass and reduce the bearing capacity of the abutment rock mass Ability to affect the stability and safety of the abutment. In order to analyze the stability of slide block on the abutment, taking LiZhou arch dam project as an example, using geomechanical model test to analyze the geological structure of the two abutments and the occurrence of the main weak structural plane, there are four potential Slide the block. On this basis, the failure test of abutment rock mass is carried out by geomechanical model overloading method, and the instability failure mechanism, the failure mode and the control factors affecting the stability of the sliding block are obtained, which provides a solution to similar engineering problems reference.