Analysis of Collapsibility and Microstructure of Loess considering Unsaturated Characteristics

马富丽; 白晓红; 王梅; 杨晶; 韩鹏举

doi:10.13409/j.cnki.jdpme.2012.05.019

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Analysis of Collapsibility and Microstructure of Loess considering Unsaturated Characteristics

更新时间：2025-12-11

- Analysis of Collapsibility and Microstructure of Loess considering Unsaturated Characteristics
- Vol. 32, Issue 5, Pages: 636-642(2012)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2012.05.019
  CLC： U444
- Published：2012
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[1]马富丽,白晓红,王梅,杨晶,韩鹏举.考虑非饱和特性的黄土湿陷性与微观结构分析[J].防灾减灾工程学报,2012,32(05):636-642.

马富丽, 白晓红, 王梅, et al. Analysis of Collapsibility and Microstructure of Loess considering Unsaturated Characteristics[J]. 2012, 32(5): 636-642.
[1]马富丽,白晓红,王梅,杨晶,韩鹏举.考虑非饱和特性的黄土湿陷性与微观结构分析[J].防灾减灾工程学报,2012,32(05):636-642. DOI： 10.13409/j.cnki.jdpme.2012.05.019.

马富丽, 白晓红, 王梅, et al. Analysis of Collapsibility and Microstructure of Loess considering Unsaturated Characteristics[J]. 2012, 32(5): 636-642. DOI： 10.13409/j.cnki.jdpme.2012.05.019.

摘要

利用扫描电子显微镜测试技术对3个场地16个土样的微观结构进行观测

并使用图像处理软件对微观图像进行处理、对土样孔隙的几何特征参数和分维数进行了提取

土样孔隙分布分维数为1.8161.936。利用分形几何学原理建立非饱和土的孔隙分布函数

对天然湿度下黄土中水分分布进行分析

运用回归分析的方法对孔隙的分维数、非饱和孔隙孔隙率和湿陷性的关系进行了分析。结果表明:孔隙分维数越大

孔隙结构越复杂;天然湿度下处于非饱和状态的黄土孔隙孔径均大于40μm

黄土的湿陷系数随着孔隙分维数、非饱和孔隙孔隙率的增大而增大

非饱和孔隙是造成黄土湿陷的主要原因。

Abstract

This paper analyzes the microstructure of 16 groups of soil sample from three different sites.Pictures of microstructure were processed with imaging processing program to acquire the geometric characteristic parameter and fractal dimension of pores.The range of pores′ fractal dimension is 1.816-1.936.The pore distribution function of unsaturated soil was established based on fractal geometry.The moisture distribution of loess under natural moisture was analyzed.The relationships of collapsibility coefficient with fractal dimension and porosity of unsaturated pores were analyzed with the method of regression analysis.A larger fractal dimension represents a more complex pore-structure.The collapsibility coefficient of loess increases with the increase of fractal dimension and porosity of unsaturated pores.Unsaturated pore is the main cause to form collapsibility of loess.

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references

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