房县深峪沟病险水库黏土心墙坝稳定性分析

以房县深峪沟病险水库黏土心墙坝为研究对象，对其渗流稳定和坝坡稳定性进行评估，目的是为加固设计提供参考。设计了校核洪水位、设计洪水位、正常蓄水位的稳定渗流计算，校核洪水位降到正常蓄水位、正常蓄水位降到死水位的非稳定流计算工况，其中正常蓄水位降到死水位的工况又设计了5种降速计算方案，利用自动搜索滑动面的Morgenstern-Price法计算了不同工况下的坝坡稳定性，分析发现：校核洪水位稳定渗流背水坡安全系数k＜1.15，不满足工程稳定性要求；设计洪水位和正常蓄水位工况，安全系数k＜1.25，不满足工程稳定性要求。校核洪水位到正常蓄水位的迎水坡满足k≥1.15的要求，背水坡不满足k≥1.15的要求；正常蓄水位到死水位迎水坡在设计的5种降速下均存在时间步不满足k≥1.25的要求，所以该水库属于病险库，需要加固处理

Research on stability of earth-rock dam with clay core of Shenyugou dangerous reservoir in Fang County

The earth-rock dam with clay core of Shenyugou dangerous reservoir in Fang County is studied, whose seepage and dam slope stability are evaluated, aiming to provide strength design with reference. Three kinds of stable seepage computing conditions such as check flood water table, designed flood water level and normal storing stage are designed and computed. Two types of unstable seepage schemes, from check flood water table to normal storing stage and lowering from normal storing water table to dead water level, are done. Moreover, five kinds of lowering velocities are designed by the latter unstable seepage scheme. Slope stability of dam is calculated at each seepage step. It is found that stability of downstream dam slope doesn't meet to the engineering requirement under three stable seepages' and two unstable seepages' conditions. So the reservoir is a dangerous one, and is in need of strengthening.