争岗滑坡堆积体滑坡灾害数值模拟预测分析

基于云南省古水水电站争岗滑坡堆积体地质调查,根据现状对滑坡体稳定性进行了初步判断,同时利用颗粒离散元方法进行宏观细观参数标定,建立了滑坡细观分析模型;在此基础上预测了滑坡过程、滑坡速度、滑坡堆积、冲出距离与滑面摩擦系数的内在关系,并根据堆积体天然含水量试验进行了滑坡灾害分析,将计算结果与现场勘查的拉裂隙分布进行了对比研究。在此基础上对滑坡体的稳定性及失稳破坏机理进行了探讨,提出了滑坡堆积体治理的基本思路。

Numerical analysis and hazard prediction of Zhenggang outwash landslide congeries

According to geological survey of Zhenggang outwash landslide congeries at Gushui hydropower station in Yunnan province, under the determined condition of zone and stage of landslide congeries, the stability of slope is back analyzed. At the same time, particle discrete element method is used to convert macro mechanical characteristic to microscopic ones and micro-analysis model of outwash landslide congeries is established, on the basis of which landslide process, landslide velocity, landslide accumulation and the rules of dash out distance and sliding friction coefficient are studied. Landslide hazard is analyzed according to moisture content test, which is compared with tension crack distribution of field survey. At last stability of landslide congeries and failure mechanism are researched while basic ideas to deal with the potential landslide disaster are put forward.