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考虑土颗粒间胶结面积的粒间吸力计算

姜小雷, 李培超

姜小雷, 李培超. 考虑土颗粒间胶结面积的粒间吸力计算[J]. 岩土工程学报, 2016, 38(6): 1160-1164. DOI: 10.11779/CJGE201606025
引用本文: 姜小雷, 李培超. 考虑土颗粒间胶结面积的粒间吸力计算[J]. 岩土工程学报, 2016, 38(6): 1160-1164. DOI: 10.11779/CJGE201606025
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JIANG Xiao-lei, LI Pei-chao. Calculation of intergranular suction considering cementing area between soil particles[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(6): 1160-1164. DOI: 10.11779/CJGE201606025
Citation: JIANG Xiao-lei, LI Pei-chao. Calculation of intergranular suction considering cementing area between soil particles[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(6): 1160-1164. DOI: 10.11779/CJGE201606025
shu

考虑土颗粒间胶结面积的粒间吸力计算  English Version

  • 上海工程技术大学机械工程学院,上海 201620

详细信息
    作者简介:

    姜小雷(1989- ),男,硕士研究生,主要从事非饱和土力学等方面的研究。E-mail: jxl283003123@163.com。

Calculation of intergranular suction considering cementing area between soil particles

  • School of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

摘要

    摘要
  • 摘要: 粒间吸力的计算是非饱和土有效应力原理研究的重点之一。首先考虑土颗粒间胶结面积,建立了微观状态下土颗粒相互作用的理想简化模型,推导给出了土颗粒接触点处各个力之间的相互关系,并分析了宏观上两种典型的堆积方式,从而总结得到了粒间吸力的统一表达式。而后,讨论了土颗粒间胶结面积对粒间吸力的影响。结果表明,直接使用表面张力分量来计算粒间吸力,可以简化粒间吸力的计算。最后,通过算例分析,阐明了颗粒间胶结面积对粒间吸力大小的影响。并基于多孔介质双重有效应力的假说,引入本研究给出的考虑土颗粒间胶结面积的粒间吸力公式,推导得到了适用于低含水率条件下非饱和土双重有效应力的计算公式。
    Abstract: The calculation of intergranular suction is a key factor concerning the study on the effective stress principle of unsaturated soils. First, taking into account the cementing area between soil particles, a simplified ideal model for granular interaction in the microscopic state is established, the relation among various stresses on soil particle contact points is derived, and two typical ways for macroscopic accumulation soil particles are analyzed. Then a unified expression for intergranular suction is proposed. Second, the effect of cementing between soil particles area on the intergranular suction is discussed. The results show that employing the surface tension component directly can simplify the calculation of intergranular suction. Finally, a case study demonstrates the existence of the cementing area between soil particles has an important influence on the intergranular suction. Besides, based on the double effective stress hypothesis in porous media, a double effective stress formulation for unsaturated soils under low water content is obtained. The aim of the study is to provide a novel idea for calculating the effective stress of unsaturated soils.
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    • 参考文献(16)
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  • 收稿日期:  2015-05-27
  • 发布日期:  2016-06-24

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