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坝体滑动主要是由干原大坝施工坝壳的上料混杂,饱和的山皮土和淤泥软弱夹层处于饱和状态,当水库水位骤降时,坝体中形成不稳定渗流,产生较大渗透压力,软弱夹层淤泥抗剪强度低,坝体抗滑力不足而产生滑动。其滑动面为复武断面。本文以某水库大坝为例;从工程施工、控制运用、日常管理方面分析了原因,根据滑体滑裂面形状,对滑体进行了稳定计算;采取了临时抢护和重新加固措施;并对今后工程管理运用提出了建议。
The sliding of the dam body is mainly caused by the mixed loading of the dam shell of the Qianyuan Dam. The saturated mountainous soil and the weak silt of the silt are in a saturated state. When the water level of the reservoir plunges, unstable seepage occurs in the dam body, resulting in large infiltration Pressure, weak interbeds silt shear strength is low, the sliding resistance of the dam is insufficient. Its sliding surface is complex section. In this paper, a reservoir dam is taken as an example. The causes are analyzed from engineering construction, control application and daily management. The stability of the sliding body is calculated according to the shape of the sliding surface of the sliding body. Temporary grabbing and re-reinforcement measures are taken. Proposed for future project management.