以三峡库区典型堆积体滑坡——张家湾滑坡为例,结合野外勘察资料,采用数值模拟方法,对该边坡在天然、枯水位、正常蓄水位条件下,张家湾地震响应分析,以研究滑坡极限抗震能力和渐进破坏模式进行研究.研究结果表明:在不考虑库水压力时,滑坡承受地震作用和降雨作用的能力较考虑水压力时小(175m蓄水+地震工况除外);针对张家湾滑坡形态特点,库水静压力的存在,对滑坡涉水坡体和涉水外的滑坡体的作用过程复杂,其变形和破坏模式发生变化:变形受到一定的约束作用,破坏模式由原潜在牵引式滑移变为伴随着潜在的牵引滑移,新生坡表坍塌的破坏形式.%Take typical deposit landslide in the three gorges reservoir area Zhangjiawan landslide for example, combine field survey data by using the method of numerical simulation of the slope under the condition of natural, low water level, normal storage level, Zhangjiawan earthquake response analysis, to study the landslide limit aseismic ability and to study the gradual failure mode. The results show that: without considering reservoir water pressure, the ability of the landslide under earthquake action and the rainfall effect is smaller than considering water pressure (except 175m water+earthquake conditions);according to the characteristics of Zhangjiawan landslide, the effect on wading slope landslide and outside of the wading landslide is complex , and the deformation and destruction mode changes due to the existence of static pressure of the reservoir water: deformation under certain constraints, failure mode by the original potential traction sliding into with the potential of traction sliding, destructional formsof the new table slope collapse.
展开▼
