库水位骤降下某均质坝除险加固后稳定性态评价  

Stability Evaluation of Reinforcement Homogeneous Dam under Drawdown of Reservoir Water Level

作　　者：阿布都卡地尔.阿布都克拉木 Abudukadier · Abudukelamu(Kashi Authority of the Tarim River Basin, Kashi 844700, Xinjiang, China)

机构地区：[1]塔里木河流域喀什管理局,新疆喀什844700

出　　处：《水利科技与经济》2018年第6期53-57,共5页Water Conservancy Science and Technology and Economy

摘　　要：为研究库水位骤降对水库均质坝稳定性态的影响,基于非饱和渗流有限元理论,采用Geo-Studio软件计算某大坝在整治后不同库水位下降速率时的安全性态,得到坝体渗流场、坝坡安全系数及最不利滑裂面。计算结果表明,坝内渗流场的变化滞后于库水位的下降时间;库水位下降速率越大,浸润线最高点越高,上游坝坡稳定性越差;上游坝坡在初期降水时安全系数随时间的推移减小明显,在降水后期安全系数随时间推移减小不明显;库水位下降速率和库水位高程对大坝上下游坝坡滑裂面位置没有影响。计算成果为整治后水库的合理运行和管理提供了科学依据。For study the stability of water level drawdown a reservoir homogeneous dam state,based on unsaturated seepage finite element theory,the safety state of the rate of decline in different water level after the renovation of the dam was calculated using Geo-Studio software,the seepage field of the dam,the dam slope safety factor and the most dangerous slip surface. The calculation results show that the change of seepage field in the dam fall time lags behind the water level; water level drawdown rate increases,the highest saturation line point higher,the stability of upstream dam slope is worse; upstream dam slope safety coefficient with the precipitation in the early time decreases significantly,in the late stage of precipitation safety coefficient with time decrease is not obvious; drawdown rate and reservoir water level elevation of the dam,the downstream dam slope slip crack surface position has no effect. The calculation results provide a reliable basis for the reasonable operation and management of the reservoir.

关 键 词：水位骤降 非饱和渗流 Geo-Studio 安全性态 

分 类 号：TV139.1[水利工程—水力学及河流动力学]