Analysis of Water Migration and Deformation of Expansive-Soil Foundation under Atmospheric Influence

赵艳林; 曾召田; 吕海波

doi:10.13409/j.cnki.jdpme.2011.06.010

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Analysis of Water Migration and Deformation of Expansive-Soil Foundation under Atmospheric Influence

更新时间：2025-12-11

- Analysis of Water Migration and Deformation of Expansive-Soil Foundation under Atmospheric Influence
- Vol. 31, Issue 6, Pages: 659-665(2011)
- 作者机构：
- 作者简介：
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- DOI：10.13409/j.cnki.jdpme.2011.06.010
  CLC： U443
- Published：2011
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[1]赵艳林,曾召田,吕海波.大气作用下膨胀土地基的水分迁移与胀缩变形分析[J].防灾减灾工程学报,2011,31(06):659-665.

赵艳林, 曾召田, 吕海波. Analysis of Water Migration and Deformation of Expansive-Soil Foundation under Atmospheric Influence[J]. 2011, 31(6): 659-665.
[1]赵艳林,曾召田,吕海波.大气作用下膨胀土地基的水分迁移与胀缩变形分析[J].防灾减灾工程学报,2011,31(06):659-665. DOI： 10.13409/j.cnki.jdpme.2011.06.010.

赵艳林, 曾召田, 吕海波. Analysis of Water Migration and Deformation of Expansive-Soil Foundation under Atmospheric Influence[J]. 2011, 31(6): 659-665. DOI： 10.13409/j.cnki.jdpme.2011.06.010.

摘要

运用土体渗流和蒸发理论

建立了大气-非饱和土相互作用模型;以现场观测的气象数据作为边界条件

进行了地基土中水分迁移的数值模拟

得到了大气作用下地基土体含水量的动态分布规律。计算结果表明

地基土中含水量变化幅度随深度增加而递减

3.5 m深度以下土体的体积含水量基本不变

从而确定了南宁地区膨胀土地基的大气影响层深度为3.5 m。在此基础上

结合已有膨胀土胀缩性指标的干湿循环效应研究成果

提出了一种同时考虑干湿循环效应和1.0 m深处含水量变化的膨胀土地基胀缩变形计算方法

通过算例将该法与传统方法进行比较

结果显示该法更加符合工程实际。

Abstract

Based on the theory of soil seepage and evaporation

the interaction model of atmosphere-unsaturated soil is established.With the field observations of climate as the boundary conditions

numerical simulation of soil water migration in foundation is investigated to obtain the dynamic distribution of moisture content in foundation soil under atmospheric influence.The results show that the changes of soil water content in foundation decrease with the increase of the depth

and they are not affected by atmosphere below the depth of 3.5 m.So the depth of atmospheric influence on expansive soil foundation in Nanning is 3.5 m.On this basis

a method for deformation of expansive-soil foundation is proposed to consider the wetting-drying effect and the change of water contents at 1.0 m depth based on the research results of wetting-drying effect on shrink and expansion of expansive soil.By the aid of an engineering example

a comparison is made with the traditional method to illustrate that this new method is more suitable for engineering practice.

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references

大气影响下平顶山膨胀土地基的变形研究 [J]. 靳向红,翟聚云. 水运工程 . 2008(07)

基于固结试验的膨胀土地基变形预测方法 [J]. 姚海林,程平,吴万平. 岩石力学与工程学报 . 2005(21)

基于收缩试验的膨胀土地基变形预测方法 [J]. 姚海林,程平,吴万平. 岩土力学 . 2004(11)

大气作用下膨胀土边坡的响应试验与灾变机理研究 [D]. 陈建斌. 中国科学院研究生院（武汉岩土力学研究所） 2006

膨胀土干湿循环效应与微观机制研究 [D]. 曾召田. 广西大学 2007

非饱和土土力学[M]. 中国建筑工业出版社 , (加)D.G.弗雷德隆德（DelwynG.Fredlund）,（印尼）H.拉哈尔佐（HariantoRahardjo）著, 1997

膨胀土与铁路工程[M]. 中国铁道出版社 , 廖世文编, 1984

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