Modelling and calculating lateral pressure of expansive soil-EPS inclusion-retaining wall system

DING Lu-qiang; HAN Zhong; ZOU Wei-lie; WAN Liang-long; KUANG Wen-zhuang

doi:10.11779/CJGE202108022

Volume 43 Issue 8

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Chinese Journal of Geotechnical Engineering > 2021 > 43(8): 1558-1564. > DOI: 10.11779/CJGE202108022

DING Lu-qiang, HAN Zhong, ZOU Wei-lie, WAN Liang-long, KUANG Wen-zhuang. Modelling and calculating lateral pressure of expansive soil-EPS inclusion-retaining wall system[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(8): 1558-1564. DOI: 10.11779/CJGE202108022

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Modelling and calculating lateral pressure of expansive soil-EPS inclusion-retaining wall system

1.
School of Civil Engineering, Wuhan University, Wuhan 430072, China
2.
Residence Engineering Management Station of Shenzhen Municipality, Shenzhen 518000, China
3.
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430072, China

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Received Date: September 04, 2020
Available Online: December 02, 2022

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Abstract

Abstract

The thermal fields and thermal expansion are used to simulate the moisture fields and swelling of expansive soils upon wetting in this study. The thermal-mechanical coupled finite element analysis is employed to simulate the "expansive soil-EPS inclusion-retaining wall" system using ABAQUS. The following influences are analyzed: (1) the interface friction among the EPS, the wall and the expansive soil; (2) the width of the expansive soil, and (3) the gap between the EPS blocks. The numerical results indicate that the lateral pressure on the retaining wall increases as the width of the expansive soil increases until the width exceeds two times the height of the retaining wall. The interface friction induces redistribution of the lateral pressure on the wall and affects of the overturning moment on the wall. The gaps between the EPS blocks do not affect the lateral pressure on the wall. The interaction mechanisms between expansive soil, EPS inclusion and retaining wall are explored based on the numerical results, and a model for calculating the lateral pressure on the "expansive soil-EPS inclusion-retaining wall" is proposed. The design method for the "expansive soil-EPS inclusion-retaining wall" is illustrated by taking the gravity retaining wall as an example.
- expansive soil,
- EPS,
- retaining wall,
- lateral pressure,
- numerical analysis

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References (17)

References

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