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叶为民, 陈宝, 卞祚庥, 朱合华, 白云. 上海软土的非饱和三轴强度[J]. 岩土工程学报, 2006, 28(3): 317-321.
引用本文: 叶为民, 陈宝, 卞祚庥, 朱合华, 白云. 上海软土的非饱和三轴强度[J]. 岩土工程学报, 2006, 28(3): 317-321.
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YE Weimin, CHEN Bao, BIAN Zuoxiu, ZHU Hehua, BAI Yun. Tri-axial shear strength of Shanghai unsaturated soft clay[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(3): 317-321.
Citation: YE Weimin, CHEN Bao, BIAN Zuoxiu, ZHU Hehua, BAI Yun. Tri-axial shear strength of Shanghai unsaturated soft clay[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(3): 317-321.
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上海软土的非饱和三轴强度

Tri-axial shear strength of Shanghai unsaturated soft clay

    摘要
  • 摘要: 由于吸力的影响,非饱和土的力学性状与饱和土有着很大的差异,饱和土的有关强度理论无法简单地运用于解决非饱和土问题。本文通过室内吸力控制的非饱和土三轴剪切试验,研究上海地区软土的强度特征。结果表明:上海软土(④层灰色淤泥质粘土)非饱和强度在低吸力范围内,与吸力基本呈线性增长关系,验证了非饱和土的双变量强度理论的适用性;上海地区第④层灰色淤泥质粘土的非饱和土抗剪强度参数?b约为10.6°。随着非饱和土问题的研究的逐步深入,非饱和土强度理论在上海地区软土地层中的应用,还有待进一步研究和完善。

     

    Abstract: The mechanical properties of unsaturated soil are quite different from those of saturated soil because of the influence of suction.Results obtained with the strength theory of saturated soil could not be directly applied to solve the problems related to the unsaturated soil.Some tri-axial tests were carried out herein to analyze unsaturated soil strength for Shanghai soft clay.It was shown that,with low suction,the tri-axial strength for unsaturated Shanghai soft clay was directly proportional to suction.These results certified the applicability of double-variables strength theory for unsaturated soil.The tri-axial shear coefficient ?b for Shanghai soft clay(④)is 10.6°.With the development of unsaturated soil mechanics,researches on the application of unsaturated theory for solving geotechnical engineering problems in Shanghai area should be strengthened.

     

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