裂隙性膨胀土饱和-非饱和渗流分析

›› 2007, Vol. 28 ›› Issue (S1): 281-285.

裂隙性膨胀土饱和-非饱和渗流分析

郑少河¹，姚海林²，葛修润²

1. 上海市建筑科学研究院，上海 200032；2. 中国科学院武汉岩土力学研究所，武汉 430071

收稿日期:2007-05-26 出版日期:2007-10-25 发布日期:2014-03-28
作者简介:郑少河，男，1972生，博士，高级工程师，主要从事土力学与地基基础方面的设计和研究工作。

Analysis of saturated and unsaturated seepage of cracked expansive soil

ZHENG Shao-he¹, YAO Hai-lin², GE Xiu-run²

1. Shanghai Research Institute of Building Sciences, Shanghai 200032, China; 2. Institute of Rock and Soil Mechanics, The Chinese Academy of Sciences, Wuhan 430071, China

Received:2007-05-26 Online:2007-10-25 Published:2014-03-28

摘要/Abstract

摘要： 降雨入渗条件下的裂隙性膨胀土边坡稳定性与其渗流场分布密切相关，对渗流分析中的积水深度进行了数值模拟，结果显示，不同的积水深度对渗流场的影响很小，因此，在进行裂隙性膨胀土渗流分析时，积水深度为0的假定是可以接受的。基于膨胀土开裂裂隙的规模及渗透性的不同，提出了考虑裂隙系统的膨胀土边坡渗流分析方法，计算结果表明，土体开裂显著改变了膨胀土内部的渗流场分布。该方法可以更好地模拟坡渗流场随时间的变化规律，以及更合理地解释了降雨入渗引起的膨胀土边坡浅层滑动机制。

关键词: 裂隙性膨胀土, 饱和-非饱和渗流, 降雨入渗, 基质吸力, 土水特征曲线

Abstract: Stability of cracked expansive soil slopes subjected to rainfall infiltration is closely related to seepage distribution. The impact of accumulated water depth on seepage is numerically analyzed. The results show that the impact of accumulated water depth on seepage distribution is very small and the assumption that accumulated water depth is zero can be accepted in seepage analysis. Based on different dimension of cracks and their different permeability of expansive soils, a new method of seepage analysis subjected to rainfall infiltration considering cracks system is presented, which shows that cracking behavior not only has a great effect on seepage distribution, but also much better simulates seepage distribution change with time than before. And the results obtained from engineering cases can reasonably explain the mechanics of shallow landslide of expansive soil slopes.

Key words: cracked expansive soil, saturated and unsaturated seepage, rainfall infiltration, matrix suction, soil-water characteristic curve

中图分类号:

TU 443

郑少河，姚海林，葛修润,. 裂隙性膨胀土饱和-非饱和渗流分析[J]. , 2007, 28(S1): 281-285.

ZHENG Shao-he , YAO Hai-lin , GE Xiu-run，. Analysis of saturated and unsaturated seepage of cracked expansive soil[J]. , 2007, 28(S1): 281-285.

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