JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A

Accepted manuscript available online (unedited version)

Effects of dry–wet cycling on the mechanical properties and microscopic characteristics of fine breccia soil from karst areas

Author(s): Xin LI, Hanqing CHEN, Dong SU, Xiangsheng CHEN, Xiang SHEN
Affiliation(s): College of Civil and Transportation Engineering, Underground Polis Academy, Shenzhen University, Shenzhen 518060, China; more
Corresponding email(s): hanqingchen@suz.edu.cn
Key Words: Karst area; Micro–macro properties; Roadbed performance; Dry–wet cycles

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Xin LI, Hanqing CHEN, Dong SU, Xiangsheng CHEN, Xiang SHEN. Effects of dry–wet cycling on the mechanical properties and microscopic characteristics of fine breccia soil from karst areas[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2400018

@article{title="Effects of dry–wet cycling on the mechanical properties and microscopic characteristics of fine breccia soil from karst areas",
author="Xin LI, Hanqing CHEN, Dong SU, Xiangsheng CHEN, Xiang SHEN",
journal="Journal of Zhejiang University Science A",
year="in press",
publisher="Zhejiang University Press & Springer",
doi="https://doi.org/10.1631/jzus.A2400018"
}

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%T Effects of dry–wet cycling on the mechanical properties and microscopic characteristics of fine breccia soil from karst areas
%A Xin LI
%A Hanqing CHEN
%A Dong SU
%A Xiangsheng CHEN
%A Xiang SHEN
%J Journal of Zhejiang University SCIENCE A
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%@ 1673-565X
%D in press
%I Zhejiang University Press & Springer
doi="https://doi.org/10.1631/jzus.A2400018"

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T1 - Effects of dry–wet cycling on the mechanical properties and microscopic characteristics of fine breccia soil from karst areas
A1 - Xin LI
A1 - Hanqing CHEN
A1 - Dong SU
A1 - Xiangsheng CHEN
A1 - Xiang SHEN
J0 - Journal of Zhejiang University Science A
SP -
EP -
%@ 1673-565X
Y1 - in press
PB - Zhejiang University Press & Springer
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doi="https://doi.org/10.1631/jzus.A2400018"

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: The quality of roadbed engineering is directly related to the fill soil structure, which, in turn, is determined by the physical and chemical environment of a given area. The karst water environment, with frequent rainfall events, promotes the dissolution of soluble rocks and transportation of underground substances, which alters the soil structure and performance. Therefore, we aimed to analyze the properties of underground soil from heavily developed karst areas. Fine breccia soil from karst regions was tested to assess its macroscopic mechanical properties and microstructural features at various initial water contents and compaction levels. Samples were subjected to simulated rainfall conditions, undergoing dry–wet cycling, followed by triaxial shear testing and electron microscopy examinations. From the data obtained, a micro-to-macro correlation and normalization model were developed. The findings suggest that the resistance of fine angular breccia soil to degradation upon to dry–wet cycling can be enhanced by high-pressure compaction and maintaining a moisture content close to the optimal level. Increasing the degree of compaction improves the particle size distribution and skeleton density of the soil. This is advantageous for minimizing soil particle erosion, thereby ensuring the robust performance of roadbeds in karst areas with frequent rainfall events.

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