非稳定渗流条件下均质土坝变形耦合特性分析  

Analysis of deformation coupling characteristics of homogeneous earth dam under unsteady seepage condition

作　　者：朱秀燕 雷红军 吴俊杰 孙亚民 施睿 ZHU Xiuyan;LEI Hongjun;WU Junjie;SUN Yamin;SHI Rui(Zigong Survey and Design Institute for Water Resources and Hydropower,Zigong 643000,China;Falculty of Electric Power Engineering,Kunming University of Science and Technology,Kunmbig 650500,China;Middle Yangtze Rwer Bureau of Hy drology and Water Resources Survey,Bureau of Hydrology of Changjiang Water Resources Commission,Wuhan 430014,China)

机构地区：[1]自贡市水利电力勘测设计院,四川自贡643000 [2]昆明理工大学电力工程学院,云南昆明650500 [3]长江水利委员水文局长江中游水文水资源勘测局,湖北武汉430014

出　　处：《水利水电快报》2022年第8期96-101,107,共7页Express Water Resources & Hydropower Information

基　　金：国家自然科学基金资助项目(51869008);昆明理工大学引进人才科研启动基金(KKSY201704008)。

摘　　要：为研究土石坝的渗流及变形运行状态,结合有限元计算软件,开展了均质坝的非稳定渗流-变形耦合计算。计算结果表明:在给定均质坝坝料渗透系数初始值并假设为常数的条件下,压强水头、浸润线、位移变形、大小主应力等要素在非稳定过程中的水位上升期变化较快;水库满蓄后,各要素变化速率逐渐减慢直至稳定,同时坝体所有要素的变化速度随渗透系数减小而减小,达到稳定状态的时间也更久。研究成果可为工程大坝安全运行状态提供判断依据,并据此合理布置防护措施。In order to study the seepage and deformation operation state of earth-rock dams,unsteady seepage-deformation coupling calculation of homogeneous dam was carried out by using finite element calculation software.The calculation results showed that:when the initial value of permeability coefficient of homogeneous dam material was given and assumed to be a constant,the factors,such as the pressure head,saturation line,displacement deformation,major and minor principal stress,etc.,changed rapidly in the water level rise period throughout the unstable process.After the reservoir was fully stored,the change rate of each factor gradually slowed down trend until it was stable.At the same time,the change rate of all factors in the dam decreased with the decrease of permeability coefficient,and the time to reach the stable state was longer.The research results can provide judgment basis for the safe operation state of dam in practical engineering,and reasonable arrangement of protective measures accordingly.

关 键 词：均质坝 土石坝非稳定渗流 渗流-变形耦合 渗透系数 

分 类 号：TV223.4[水利工程—水工结构工程]