摘要
结合某水利枢纽工程的地形、地质、水文等工程条件,通过三维有限元静力计算与稳定分析,针对混凝土防渗墙模量变化对防渗墙的应力和位移的影响进行三维有限元计算。通过对不同方案的计算分析和研究,全面了解各方案坝体尤其是防渗体的应力-应变分布规律,为坝型选择、坝体结构设计、防渗设计对混凝土防渗墙与大坝防渗体的结合形式以及塑性区大小的确定提供重要依据。研究结果表明,防渗墙的弹性模量与应力有着直接关系,降低弹模值,相应的应力值亦会减小;增大弹模值,相应的位移变化会减小。
Combined with the topographic,geological,hydrological and other engineering conditions of a water control project,through three-dimensional finite element static calculation and stability analysis,this paper makes a detailed three-dimensional finite element calculation on the influence of the change of concrete cut-off wall modulus on the stress and displacement of the cut-off wall.Through the calculation,analysis and research of different schemes,we have a more comprehensive understanding of the stress-strain distribution law of the dam body of each scheme,especially the impervious body,which provides an important basis for the selection of dam type,the structural design of dam body,the combination form of concrete impervious wall and dam impervious body and the determination of the size of plastic zone in the impervious design.The results show that there is a direct relationship between the elastic modulus and the stress of the cut-off wall,and the corresponding stress value will decrease when the elastic modulus is reduced.The displacement change will decrease with the increase of elastic modulus.
作者
吕智
LÜZhi(Tacheng Water Resources and Hydropower Survey and Design Institute,Tacheng 834700,Xinjiang,China)
出处
《水利科技与经济》
2022年第7期40-44,共5页
Water Conservancy Science and Technology and Economy
关键词
混凝土
防渗墙
应力
concrete
cut-off wall
stress
