摘要
研究重力坝坝基的软弱夹层强度.对于河床两岸的软弱夹层,可以直接取样进行强度试验获得强度参数,而深埋河床底部的软弱夹层,不能直接取得试样进行强度试验.为了获取河床坝基底部不同埋深的软弱夹层强度参数,通过现场和室内完成的大量抗剪强度试验、含水率与塑液限测定及压缩试验结果,建立强度参数与性状指标(w/wP)的相关方程和正应力与性状指标的相关方程,从而求得正应力与强度参数间的计算关系式.通过有限元计算获得河床坝基底部各软弱夹层不同深度处的正应力,求得对应软弱夹层的强度参数值.
The shear strength of the weak intercalated layers was analyzed. For the weak intercalated layers which are located at the both sides of riverbed, the strength parameters can be obtained through the strength tests of samples. For the weak intercalated layers which are under the bottom of riverbed, test samples can＇t be gotten. In order to obtain the strength parameters of the dam-foundation weak intercalated layers in different buried depth, a functional expression to describe the relation between strength pa- rameter and characteristic index （w/we） was established according to the results obtained from a large number of shear strength tests, water content and liquid/plastic limit determination test, and compression experiments which were conducted in field or laboratory. The relationship between normal stress and char acteristic index was estimated. Then a calculation formula between strength parameter and normal stress can be obtained. The numerical analysis was performed using finite element method （FEM） in order to get the normal stress of each weak intercalated layer which is under the bottom of riverbed with varied eleva- tions, and the strength parameters of each weak intercalated layer can be gotten.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2013年第1期162-168,192,共8页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(41072229)
水力学与山区河流开发保护国家重点实验室(四川大学)开放基金资助项目(201110)
重庆交通大学水利水运工程教育部重点实验室暨国家内河航道整治工程技术研究中心开放基金资助项目(SLK2011B04)
关键词
软弱夹层
强度参数
性状指标
正应力
有限元分析(FEA)
weak intercalation
strength parameter
property index
normal stress
finite element analysis （FEA）
