库水位下降速率对土石坝稳定性分析研究

库水位下降过程中，坝体黏性土对水份的吸力作用使得黏性土体内的水份不能及时消散，造成黏性坝体内水位高于库内水位，所发生现象对坝坡渗流、稳定与应力均产生较大影响.以大禾田水库为例，基于饱和-非饱和渗流理论，采用二维有限单元方法，分析库水位下降后的渗流稳定、应力及水压荷载作用下位移变形，分析库水位下降速率对土石坝稳定性的影响，研究结果对水库调度运行管理有一定的指导作用.

英文摘要:

In the process of reservoir water level declining，because of the adsorption of cohesive soil on water moisture，the moisture content of the cohesive soil can not dissipate in time，resulting in viscous dam body water level was higher than the reservoir water level，this phenomenon had a great impact on seepage，stability and stress of dam slope.Taking Dahe Tin reservoir as an example，based on the saturated-unsaturated seepage theory，a two-dimensional finite element method was used，the seepage stability，stress and displacement under hydrostatic load，drawdown rate of reservoir water level were analyzed，the research results play a guiding role in the operation and management of reservoirs.

查看全文查看/发表评论下载PDF阅读器

关闭