非稳态渗流条件下应力场与渗流场耦合作用分析  

Research on coupling effect of stress and seepage field under unsteady seepage

作　　者：周建芬[1] 毛前[1] 王玉强[1] 张晓悦[1] 

机构地区：[1]浙江水利水电专科学校,浙江杭州310018

出　　处：《人民长江》2012年第19期64-67,共4页Yangtze River

基　　金：浙江省教育厅科研基金资助项目"土石坝应力场和渗流场的空间耦合方法的研究"(21211)

摘　　要：基于非稳定渗流条件下应力场与渗流场耦合作用数值模型,研究某水库蓄水6 a内渗流量与坝基变形的情况。分析结果显示,在库区及坝体迎水面铺设全封闭土工膜情况下,水库蓄水初的5 a时间里库区坝基及坝址区域地下水位、渗漏量呈动态变化。库区坝基及坝下游水位和孔隙水压力在蓄水初5 a里可达到稳定,头2 a的变化较大。水库渗漏量在蓄水初的5 a里逐年递增最后达到稳定值。坝基最大沉降量出现在坝体底面中部,约为0.72 m。Based on the coupling numerical model of stress and seepage fields under unsteady seepage condition,we study the seepage volume and the deformation of dam foundation in 6 years since impoundment of a reservoir.In consideration of the enclosed geo-membrane laid on water side of the dam,a dynamic variation of water level and seepage volume at dam foundation and dam site is revealed for the first five years.In the five years,the water level and pore pressure of dam foundation and dam toe fluctuate heavily in the first two years and then tended to be stable,and the seepage volume of the reservoir first increase progressively and then become stable.The largest subsidence of dam body occurred in the middle of dam bottom with the largest value of 0.72 m.

关 键 词：全封闭土工膜 非稳定渗流 耦合作用 渗漏量 沉降 

分 类 号：P642[天文地球—工程地质学]