土石坝加高对既有低弹模防渗墙应力及变形影响分析  

Analysis of Influence of Heightening of Earth Rock Dam on Stress and Deformation of Existing Low Elastic Modulus Cutoff Wall

作　　者：郎敏 陈向明 李佳 邓成发 谢中凯 LANG Min;CHEN Xiangming;LI Jia;DENG Chengfa;XIE Zhongkai(Wuyi County Bureau of Water Resources,Wuyi 321200,Zhejiang,China;Xuanping River Hydropower Engineering Management Office of Wuyi County,Wuyi 321200,Zhejiang,China;Wanbang Engineering Management Consulting Co.,Ltd.,Hangzhou 310020,Zhejiang,China;Zhejiang Institute of Hydraulics&Estuary(Zhejiang Institute of Marine Planning&Design),Hangzhou 310017,Zhejiang,China;Zhejiang Provincial Key Laboratory of Hydraulic Disaster Prevention and Mitigation,Hangzhou 310017,Zhejiang,China)

机构地区：[1]武义县水务局,浙江武义321200 [2]武义县宣平溪水电工程管理处,浙江武义321200 [3]万邦工程管理咨询有限公司,浙江杭州310020 [4]浙江省水利河口研究院(浙江省海洋规划设计研究院),浙江杭州310017 [5]浙江省水利防灾减灾重点实验室,浙江杭州310017

出　　处：《浙江水利科技》2022年第4期56-60,63,共6页Zhejiang Hydrotechnics

基　　金：浙江省基础公益研究计划项目(GF18E090006);浙江省科研院所专项(ZJ-A20001)。

摘　　要：针对某典型土石坝加高工程进行数值计算,分析既有防渗墙弹性模量对防渗墙变形及应力的影响。计算结果表明:随着混凝土防渗墙弹性模量的增加,防渗墙上、下游侧最大和最小主应力逐渐增大。水库蓄水可减小防渗墙的拉应力,但防渗墙下游侧压应力有所增大。防渗墙水平位移随弹性模量的增加变化不明显,水库蓄水可抵消由于大坝加高堆载引起的防渗墙向上游的水平位移。Based on the numerical calculation of a typical heightening project of an earth rock dam,the influence of the elastic modulus of the existing cutoff wall on the deformation and stress of the cutoff wall is analyzed.The results show that:with the increase of the elastic modulus,the maximum and minimum main stress of the cutoff wall at the upper stream and downstream sides are increasing gradually;the reservoir storage can reduce the tensile stress of cutoff wall,but the downstream side stress would increase to a certain extent;the horizontal displacement of the cutoff wall does not change significantly with the increase of the elastic modulus,and the impounding of the reservoir can offset the horizontal displacement of the cutoff wall to the upstream caused by the heightening of the dam surcharge.

关 键 词：土石坝 加高 防渗墙 应力 

分 类 号：TV543.8[水利工程—水利水电工程]