覆盖层内防渗墙应力变形影响因素敏感性分析  

Sensitivity Analysis about Influencing Factors on Stress-deformation of Cutoff Wall in Deep Overburden

作　　者：吕高峰[1] 朱锦杰[1] 王玉洁[1] 

机构地区：[1]国家能源局大坝安全监察中心,浙江杭州310014

出　　处：《浙江水利水电学院学报》2016年第1期46-51,共6页Journal of Zhejiang University of Water Resources and Electric Power

摘　　要：防渗墙是处理深覆盖层最为重要的手段.以西南丹巴工程为例,通过建立有限元网格,对防渗墙厚度、接头型式和材料参数等因素进行了敏感性分析.结论表明:防渗墙墙体越厚,大主应力值越小;空接头能减小接头附近的大主应力;同时防渗墙弹模的降低能够有效地减小防渗墙大主应力;且覆盖层材料越好,对防渗墙变形的约束作用越强,防渗墙变形就越小,大主应力也相应越小.Cutoff wall is the most important treatment for deep overburden. Based on Badan Project in southwest China,by establishing the finite element mesh,the sensitivity analysis on cutoff wall thickness,type of joint and material parameter is carried out. The conclusion shows：（ 1） The thicker cutoff wall is,the smaller stress value will be;（ 2） Empty joint can reduce the stress value of cutoff wall near the joint;（ 3） Reducing elastic modulus of cutoff wall can effectively reduce stress value;（ 4） The better overburden material is,the stronger constraints will be on deformation of cutoff wall,therefore,the deformation and stress of cutoff wall is smaller.

关 键 词：覆盖层 防渗墙 应力 变形 

分 类 号：TV551.3[水利工程—水利水电工程]