土石坝防渗体土料的震裂试验研究  

Experimental Study on Shocking Crack of Impervious Soil in Earth-Rock Dams

作　　者：余湘娟[1] 姜朴[1] 

机构地区：[1]河海大学地质及岩土工程系

出　　处：《河海大学学报（自然科学版）》1996年第3期68-75,共8页Journal of Hohai University(Natural Sciences)

基　　金："八五"国家重点科技攻关项目

摘　　要：通过两种击实土样的三轴拉伸试验和周期拉压试验，研究静力拉裂和周期加荷拉裂的破坏标准，用于土石坝有限元分析判别防渗体土料拉裂和震裂的发生与发展；并研究拉伸与压缩弹性模量的差别以及周期拉压在有反向应力时弹性模量与阻尼比的变化；最后对实际应用提出了建议．Based on the results of triaxial extension, cyclic extension and compression tests of two kinds of compacted soil samples, the tensile strength under the static load and cyclic load is obtained. These results can be used to finite element method analysis for earth-rock dams. The difference of elastic modulus between extension and compression conditions as well as the variation of elastic modulus and damping ratio during cyclic extension and compression in the presence of reverse stress are studied. Some suggestions are put forward about the use of these parameters in tensile stress analysis.

关 键 词：土石坝 抗拉强度 周期拉压 拉裂 试验 

分 类 号：TV641[水利工程—水利水电工程]