【摘要】 在原有的塑性体积应变状态量外,对修正剑桥模型的屈服函数引入描述超固结黏土变形和强度特性的状态量,以进一步改进修正的剑桥模型以应用于超固结土的变形特性研究。并给出该状态量的演化规则。通过对各种不同超固结比的三轴压缩和伸长剪切试验结果的验证表明,本文改进的三维修正剑桥模型能合理地反映不同超固结比黏土在三轴压缩和伸长条件下的变形及强度特性,同时,本文预测结果和中井子负荷面模型的预测结果基本一致。更多还原

【Abstract】 The research result of the sub-loading model is utilized to investigate the deformation and strength behavior of over-consolidated soils by applying modified 3-D Cam Clay Model.In addition to the conventional plastic volumetric strain,a state variable describing the deformation and strength of over-consolidated soil is introduced to further improve the modified Cam Clay Model for investigating the characteristics of over consolidated soil,and the evolution law of this variable is studied.The validity of the improved modified 3-D Cam Clay Model is verified by the axial compression and extension test data for soil with different over-consolidated ratio.The predicted dilatancy of over-consolidated soils is in good agreement with the result of Nakai’s sub-loading model.更多还原