[1] Cheng Yongzhen, Huang Xiaoming, Li Chang, Li Lianyou, et al. Numerical analysis of crack generation within embankmentbuilt on expansive soil foundation [J]. Journal of Southeast University (English Edition), 2017, 33 (2): 224-229. [doi:10.3969/j.issn.1003-7985.2017.02.016]

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Numerical analysis of crack generation within embankmentbuilt on expansive soil foundation()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

33

Issue:

2017 2

Page:

224-229

Research Field:

Traffic and Transportation Engineering

Publishing date:

2017-06-30

Info

Title:

Numerical analysis of crack generation within embankmentbuilt on expansive soil foundation

Author(s):

Cheng Yongzhen¹;  Huang Xiaoming¹;  Li Chang¹;  Li Lianyou²

¹School of Transportation, Southeast University, Nanjing 210096, China
²Science and Technology Department, China Road and Bridge Corporation, Beijing 102600, China

Keywords:

expansive soil foundation;  soil shrinkage;  consolidation;  tensile stress;  embankment cracks

PACS:

U416

DOI:

10.3969/j.issn.1003-7985.2017.02.016

Abstract:

In order to analyze the initial cracking behavior of highway embankment in the regions of expansive soil, the changes in peaks of tensile stress and their location on top of the embankment for a typical highway embankment section were simulated by ABAQUS. The simulation results indicate that the matric suction was a concave distribution on top of the expansive soil foundation and that it induced differential deformation of foundation and embankment.The peaks of tensile stress on top of the embankment are not located at a fixed site, but gradually move towards the shoulder following the evaporation duration. When the evaporation intensity is larger, the peak of tensile stress on top of embankment increases at a faster rate following the evaporation duration, and its location is closer to the shoulder. The thicker expansive soil layer helps the peaks of tensile stress to reach the critical tensile stress quickly, but the embankment cannot crack when the expansive soil layer is no more than 1.5 m after 30 d soil surface evaporation; the higher the embankment, the smaller the peak of tensile stress occurring on top of the highway embankment, and its location will be further away from the shoulder. Therefore, a higher embankment constructed on a thinner expansive soil layer can reduce the crack generation within the highway embankment.

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Memo

Memo:

Biographies: Cheng Yongzhen(1982—), male, graduate; Huang Xiaoming(corresponding author), male, doctor, professor, huangxm@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51378121).
Citation: Cheng Yongzhen, Huang Xiaoming, Li Chang, et al. Numerical analysis of crack generation within embankment built on expansive soil foundation[J].Journal of Southeast University(English Edition), 2017, 33(2):224-229.DOI:10.3969/j.issn.1003-7985.2017.02.016.

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