摘要
为提高抽水蓄能电站上水库进出水口的防渗土工膜在挖填分界部位受力变形计算分析的可靠性和精确性,在库盆回填体有限元整体模型计算分析的基础上,采用子模型法对整体模型中靠近挖填分界部位建立局部子模型进行分析,同时利用该方法分析了在整体模型中增设增模区和局部子模型中改变土工膜铺设方式相结合的措施对降低土工膜局部应变的效果。结果表明:通过增设增模区和局部改变土工膜铺设方式相结合的措施,能够降低土工膜局部应变,使之满足工程要求,但具体采用何种局部土工膜铺设方式,还需结合水头大小、土工膜下支持层模量等不同情况进行具体分析。
To improve the reliability and accuracy of the calculation and analysis for the stress and deformation of the anti-seepage geomembrane at the excavation and filling boundary from the inlet and outlet of a pumped storage power station upper reservoir,the submodel method was adopted to establish a local submodel for the whole model near the boundary of excavation and filling based on the calculation and analysis of the whole finite element model of the reservoir basin backfill.At the same time,this method was used to analyze the effect on reducing the local large strain of geomembrane at the cut fill boundary by the combination of adding additional model area in the overall model and changing the laying modes of geomembrane in the local sub model.The results show that the above measures can reduce local strain so as to meet engineering requirements.Specific laying modes of geomembrane should be analyzed by water head and modulus of the support layer.
作者
王樱畯
雷显阳
姜晓桢
王颂翔
WANG Yingjun;LEI Xianyang;JIANG Xiaozhen;WANG Songxiang(Power China Huadong Engineering Corporation Limited,Hangzhou 310014,China;Geotechnical Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210024,China)
出处
《水利水电科技进展》
CSCD
北大核心
2022年第4期51-54,73,共5页
Advances in Science and Technology of Water Resources
基金
国家自然科学基金(51509165)。
关键词
土工膜局部变形
子模型法
支持层
抽水蓄能电站
local deformation of geomembrane
submodel method
support layer
pumped storage power station
