Soil deformation analysis of expansive soil slope bolt pull-out test before and after soaking

WU Xiaowen; WU Yuedong; LIU Jian; ZHANG Wenhui; SUN Chuanming

doi:10.20265/j.cnki.issn.1007-2993.2025-0144

Volume 40 Issue 3

Jun. 2026

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Article Navigation > GEOTECHNICAL ENGINEERING TECHNIQUE > 2026 > 40(3): 436-442

WU Xiaowen, WU Yuedong, LIU Jian, ZHANG Wenhui, SUN Chuanming. Soil deformation analysis of expansive soil slope bolt pull-out test before and after soaking[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(3): 436-442. doi: 10.20265/j.cnki.issn.1007-2993.2025-0144

Citation:

WU Xiaowen, WU Yuedong, LIU Jian, ZHANG Wenhui, SUN Chuanming. Soil deformation analysis of expansive soil slope bolt pull-out test before and after soaking[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(3): 436-442. doi: 10.20265/j.cnki.issn.1007-2993.2025-0144

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Soil deformation analysis of expansive soil slope bolt pull-out test before and after soaking

doi: 10.20265/j.cnki.issn.1007-2993.2025-0144

WU Xiaowen^{1, 2
,},
WU Yuedong^{1, 2
,
,},
LIU Jian^{1, 2},
ZHANG Wenhui^{1, 2},
SUN Chuanming^{1, 2}

1.
Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, Jiangsu, China
2.
Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, Jiangsu, China

Received Date: 2025-03-28
Accepted Date: 2025-06-26
Rev Recd Date: 2025-06-13

Available Online: 2026-06-08

Publish Date: 2026-06-08

Abstract

Abstract

The failure of bolt anchorage is mainly manifested as the relative displacement between the anchorage body and the surrounding soil. When applied to expansive soil slope, the influence of bolt reinforcement principle on the wetting expansion law of expansive soil is not clear. Therefore, the indoor expansive soil slope bolt pull-out test was carried out, and the artificial immersion method was used to simulate the river water storage. The actual deformation vector diagram of the soil unit before and after immersion is analyzed, and the software GeoPIV8 is used to study the deformation law of the bolt soil during the pull-out process. The test results show that the closer to the top of the anchorage body, the greater the influence range of the anchorage body on the surrounding soil during the drawing process, and gradually decreases along the length direction of the anchorage body. The expansion deformation of the slope after soaking shows that the shallower the buried depth, the greater the expansion deformation of the soil. Compared with the state of expansive soil before soaking, the influence range of anchor body on surrounding soil after soaking first increases to 4.4 times of its range during drawing process, and then gradually decreases to 40% of that before soaking.
- expansive soil slope,
- anchor rod,
- pull-out test,
- side slope support

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References(18)

References

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Soil deformation analysis of expansive soil slope bolt pull-out test before and after soaking

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