采用Duncan-Chang的E-ν非线性弹性模型对两河口心墙堆石坝进行了三维有限元应力变形计算,分析了堆石坝在填筑期及蓄水期的应力应变特性.在此基础上,研究了坝体下游次堆石分区范围变化及其部分模型参数变化、心墙底部高塑性土厚度变化及其部分参数变化对坝体应力变形、心墙拱效应和抗水力劈裂能力的影响,进一步认识了心墙堆石坝的应力应变特性.
The stress and strain of Lianghekou core rockfill dam were calculated by using of Duncan-Chang's E-ν nonlinear elastic model,which based on three-dimensional finite element method.The stress-strain property of dam during dam construction and impounding were studied.Based on the former study,the effects on stress-strain,core arching effect and hydraulic fracturing of the dam,which caused by not only the changes of zone size and some model's parameters of secondary rockfill in Lower river of the dam,but also the changes of high-plastic clay's thickness and model parameters,were also studied.The stress-strain property of core rockfill dam were further investigated.