论文部分内容阅读
采用研制的卧式三轴拉压试验仪对糯扎渡和双江口心墙堆石坝心墙土料进行了常规三轴压缩试验、三轴拉伸(伸长)试验和三轴压缩–拉伸组合试验。根据试验结果,研究了压实黏土在三轴压缩、拉伸以及从压缩到反向拉伸状态下的应力应变特性。在此基础上,对邓肯张EB模型的应用范围进行了扩展,扩展后的模型可描述压实黏土从压缩到反向拉伸过程的变形特性,可用于进行土体张拉裂缝扩展问题的模拟计算。
The triaxial compression tests, triaxial tensile tests (elongation) and triaxial compression tests were carried out on the core wall materials of Nuozhadu and Shuangjiangkou core rockfill dam using the developed horizontal triaxial compression testing machine Extension combination test. Based on the experimental results, the stress-strain behavior of compacted clay under triaxial compression, tensile and compression to reverse tensile conditions was studied. On this basis, the application range of Duncan Zhang EB model is extended. The extended model can describe the deformation characteristics of compacted clay from compression to reverse tension and can be used to simulate the expansion of tension cracks in soil Calculate.