| 徐连民,祁德庆,高云开.用修正剑桥模型研究超固结土的变形特性[J].水利学报,2008,39(3): |
| 用修正剑桥模型研究超固结土的变形特性 |
| Study on characteristics of over consolidated soils with modified Cam Clay Model |
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| DOI： |
| 中文关键词: 修正剑桥模型 子负荷面模型 土的变形和强度 超固结土 |
| 英文关键词: modified Cam Clay Model sub loading model deformation and strength of soil over consolidated soil |
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| 摘要点击次数: 4570 |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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. |
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