水利水电科技进展2011，Vol.31Issue(6)：50-54,5.DOI:10.3880/j.issn.1006-7647.2011.06.013
面板裂缝对积石峡水电站大坝渗流场影响的数值模拟
Numerical sinulafion of influences of cracks on seepage fields of Jishixia Hydropower Station
摘要
Abstract
Based on the motion law of the steady flows in aequilate cracks, a numerical model for the cracks in concrete face rockfill dams was established by use of the interface element method. The unification of the seepage analysis in cracks and other sections was achieved. Accordingly, a finite element analysis software-ground water simulation system (GWSS) for 3D seepage fields of concrete face rockfill dams with crack elements was compiled. By means of the GWSS, the seepage fields of Jishixia Concrete Face Rockfill Dam under two working conditions without cracks and with vertical cracks were analyzed. The distribution laws of the seepage fields were obtained after the occurrence of cracks in the face. The numerical results show that the cracks at different locations with different depths and widths have different influences on the seepage fields of the dam, seepage discharge and permeability gradient. The cracks appeared at the upper part of the dam exert less influences on the seepage fields than those at the lower and middle parts. Once cracks appear in the face, large permeability gradient will be aroused in the surrounding areas of the face and transition materials in the cushion layer and it rapidly decays with the increase of the distance from the cracks.关键词
混凝土面板/裂缝/渗流/数值模拟/有限元分析/积石峡水电站Key words
concrete face rockfill dam/ crack/ seepage flow/ numerical simulation/ finite element analysis/ Jishixia Hydropower Station分类
建筑与水利引用本文复制引用
刘昌军,丁留谦,徐泽平,蔡新合,张顺福..面板裂缝对积石峡水电站大坝渗流场影响的数值模拟[J].水利水电科技进展,2011,31(6):50-54,5.基金项目
"十一五"国家科技支撑计划(2008BAB42B05,2008BAB42B06) （2008BAB42B05,2008BAB42B06）
国家国际科技合作计划(2010DFA74520) （2010DFA74520）
