CAJ | 학술논문

对瀑布沟水电站心墙土石坝进行了三维非线性有限元计算分析，以深入了解高土石坝坝体和基础防渗墙在施工期和蓄水期的应力、变形分布规律。散粒材料均采用邓肯E-ν模型，混凝土采用线弹性模型，接触面采用Goodman单元，并在计算中考虑了上游坝壳、过渡料和反滤料等因水库蓄水而产生的湿化变形。计算结果表明：大坝的应力和变形分布规律基本合理，大坝最大沉降均发生在水库满蓄期，心墙内没有出现拉应力，在心墙、防渗墙、墙顶廊道的接头部位设置的高塑性黏土区改善了大坝的应力状况，使得剪切破坏区大大减小，达到了控制该部位应力与变形的目的。
대폭포구수전참심장토석패진행료삼유비선성유한원계산분석，이심입료해고토석패패체화기출방삼장재시공기화축수기적응력、변형분포규률。산립재료균채용산긍E-ν모형，혼응토채용선탄성모형，접촉면채용Goodman단원，병재계산중고필료상유패각、과도료화반려료등인수고축수이산생적습화변형。계산결과표명：대패적응력화변형분포규률기본합리，대패최대침강균발생재수고만축기，심장내몰유출현랍응력，재심장、방삼장、장정랑도적접두부위설치적고소성점토구개선료대패적응력상황，사득전절파배구대대감소，체도료공제해부위응력여변형적목적。
In order to analyze the stress and deformation distribution regularities of high rockfill dam and foundation diaphragm wall deeply,Pub-ugou high rockfill dam was used as an example of the 3-D nonlinear FEM analysis. Granular materials were adopted Duncan E-v model,concrete by using the linear elastic model,contact interface was adopted the Goodman element model,and the soaking deformation of the upstream shell, transition and the filter materials due to the reservoir filling was also considered in computing. The results show that the dam's stress and deformation distribution are basically reasonable,the maximum dam settlement occurs in the reservoir storage period and no tensile stress appears in the core-wall of Pubugou high rockfill dam,the high plastic clay area located in the corewall,diaphragm wall and the joint parts of the wall corridor reduce the shear failure area greatly,which achieves the control purpose of stress and deformation.