| 非饱和土中力的传递机理与有效应力分析 |
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| 引用本文： | 谢定义,邢义川,刘奉银,LIU Feng-yin.非饱和土中力的传递机理与有效应力分析[J].西安理工大学学报,2001,17(1):1-5. |
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| 作者姓名： | 谢定义 邢义川 刘奉银 LIU Feng-yin |
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| 作者单位： | 1. 西安理工大学水利水电学院,
2. Xi'an University of Technology, |
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| 基金项目： | 国家自然科学基金资助项目(59779018)。 |
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| 摘 要： | 从力的传递机理入手分析了非饱和土中有效应力。将非饱和土视为由土粒、收缩膜、孔隙水和孔隙气构成的四相介质，水气交界面的收缩膜与土粒构成土骨架系统，它受到表面张力以及土粒间可能出现的胶结力和嵌固力等的作用；非饱和土的流体（水体与气体）只传递无偏应力，而且受渗析作用的影响。根据非饱和土中在任一平面上内外作用力之间的平衡关系导出了可以考虑诸多因素的有效应力表达式。
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| 关 键 词： | 非饱和土 力传递机理 有效应力 |
| 文章编号： | 1006-4710(2001)01-0001-05 |
| 修稿时间： | 2000年5月10日 |
Stress Transmission Mechanism and Effective Stress
Analysis of Unsaturated Soils |
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| XIE Ding yi, XING Yi chuan, LIU Feng yin.Stress Transmission Mechanism and Effective Stress
Analysis of Unsaturated Soils[J].Journal of Xi'an University of Technology,2001,17(1):1-5. |
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| Authors: | XIE Ding yi XING Yi chuan LIU Feng yin |
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| Abstract: | The effective stress of unsaturated soil is analyzed in view of the mechanism of force transmission behaviors. In this paper, the unsaturated soil is taken as a 4 phases medium composed of soil particles, contraction membrane, pore water and pore air. Meanwhile, the soil skeleton is considered as a system of soil particles and contraction membrane. It experiences the effect of surface tension and possible cemented force and embedded force between soil particles. The flow mass (water and air) in soil pores is considered as a kind of medium transmitting only the non deviate stress. The effect of osmotic action on pore water pressure is also considered. And finally, a new effective stress expression is suggested for the unsaturated soil based on the equilibrium relation between its external and internal forces. |
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| Keywords: | unsaturated soils stress transmission mechanism effective stress |
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