| 重塑上海软土的压缩和剪切变形特性试验研究 |
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| 引用本文： | 孙德安,陈波,周科.重塑上海软土的压缩和剪切变形特性试验研究[J].岩土力学,2010,31(5):1389-1394. |
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| 作者姓名： | 孙德安 陈波 周科 |
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| 作者单位： | 上海大学,土木工程系,上海,200072 |
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| 基金项目： | 上海市教育委员会资助项目 |
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| 摘 要： | 根据典型上海软土重塑土样的等向压缩试验,测K0与不测K0的单向压缩试验结果,得到不同试验条件下的压缩指数Cc和膨胀指数Cs,并分析了它们之间的关系。进行三轴排水剪切试验,得到了重塑上海软土在不同超固结比和围压下的变形和强度特性,并计算出重塑上海软土的内摩擦角。最后,根据一组不同荷载下的长期单向压缩试验结果,得到重塑上海软土的次压缩系数Cα与荷载之间的关系。上述研究得到的初步结论及相关参数可为工程实践、超固结上海软土本构模型的建立提供参考数据。
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| 关 键 词： | 重塑上海软土 压缩指数 膨胀指数 超固结比 次固结系数 |
| 收稿时间： | 2008-06-12 |
Experimental study of compression and shear deformation characteristics of remolded Shanghai soft clay |
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| SUN De-an,CHEN Bo,ZHOU Ke.Experimental study of compression and shear deformation characteristics of remolded Shanghai soft clay[J].Rock and Soil Mechanics,2010,31(5):1389-1394. |
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| Authors: | SUN De-an CHEN Bo ZHOU Ke |
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| Institution: | Department of Civil Engineering, Shanghai University, Shanghai 200072, China |
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| Abstract: | The differences and relationships in compression index Cc and swelling index Cs of typical remolded Shanghai soft clay, measured using different test methods including isotropic compression-swelling tests and one-dimensional compression- swelling tests with or without K0 being measured, are studied. The deformation and strength of the soil are measured by drained triaxial compression tests, with different over-consolidation ratios and cell pressures. Also, the friction angle at critical state is determined from the test results. Finally, the coefficient of secondary consolidation of remolded Shanghai soft is studied using results of long-term oedometer tests with different vertical pressures. The parameters and preliminary conclusions from the above-mentioned investigations are valuable to engineering practices and establishment of constitutive model for Shanghai over-consolidated soft clay. |
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| Keywords: | remolded Shanghai soft clay compression index swelling index over-consolidation ratio coefficient of secondary consolidation |
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