湿化变形对斜心墙堆石坝受力变形特性的影响  

Effect of wetting deformation on behavior of earth rockfill dam

作　　者：陆阳洋 高庄平[1,2] 朱俊高[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学岩土工程科学研究所,南京210098

出　　处：《扬州大学学报（自然科学版）》2014年第3期64-68,73,共6页Journal of Yangzhou University：Natural Science Edition

基　　金：高等学校博士学科点专项科研基金资助项目(20110094110002)

摘　　要：为研究心墙堆石坝的湿化变形影响,采用邓肯E-B模型和沈珠江湿化变形模型,利用三维有限元对某斜心墙堆石坝进行了计算,分别考虑及不考虑上游堆石体湿化变形情况,分析上游坝壳堆石体产生湿化变形后坝体的应力变形状态,探讨湿化变形对大坝应力变形的影响规律.同时,将湿化变形的参数增大20%及减小20%,进一步分析湿化变形的影响.结果表明:上游坝壳的湿化变形会使上游坝壳和心墙沉降增大,对下游坝壳几乎没有影响,但是上游坝壳湿化变形却导致整个坝体向上游水平位移,坝顶位移最大.The flooding of rockfill in earth-rock dam produces wetting deformation, which has some effect on the dam. To research the effect of wetting on core rockfill dam. Duncan ~＇-B model and Shen Zhujiang wetting deformation model are used to calculate an oblique core rockfill dam with three-dimensional finite element. The author analyses upstream dam shell rockfill deformation and stress after wetting deformation in considering and not considering upstream rockfill wetting deformation, studies the wetting deformation of stress. At the same time, further analysis of the wet deformation is carried out when the wetting deformation parameters are increased by 20% and reduced by 20% respectively. The results show that the wetting deformation of upstream dam shell causes the upstream dam shell and the core wall settlement to increase, but has little effect on downstream dam shell; and causes the whole dam upstream horizontal displacement, displacement in the dam crest is the largest one.

关 键 词：斜心墙堆石坝 湿化变形 位移 应力 

分 类 号：TV641.1[水利工程—水利水电工程]