Centrifuge model tests on the near-horizontal slide of hard soil-soft rock landslides

HU Le; XIN Peng; WANG Tao; LIANG Changyu; LI Congan

doi:10.12090/j.issn.1006-6616.2021.27.01.008

Volume 27 Issue 1

Feb. 2021

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Article Navigation > Journal of Geomechanics > 2021 > 27(1): 73-82

HU Le, XIN Peng, WANG Tao, et al., 2021. Centrifuge model tests on the near-horizontal slide of hard soil-soft rock landslides. Journal of Geomechanics, 27 (1): 73-82. DOI: 10.12090/j.issn.1006-6616.2021.27.01.008

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Centrifuge model tests on the near-horizontal slide of hard soil-soft rock landslides

doi: 10.12090/j.issn.1006-6616.2021.27.01.008

HU Le^{1, 2, 3
,},
XIN Peng^{1, 3
,
,},
WANG Tao^{1, 3},
LIANG Changyu^{1, 3},
LI Congan⁴

1.
Chinese Academy of Geological Sciences, Beijing 100081, China
2.
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
3.
Key Laboratory Neotectonic movement and Geohazard, Institute of Geomechanics, Beijing 100081, China
4.
Key Laboratory of Geotechnical Mechanics and Engineering of Water Resources Ministry, Yangtze River Scientific Research Institute, Wuhan 430010, Hubei, China

More Information

Received: 2020-09-27
Revised: 2020-12-30
Published: 2021-02-28

Abstract

Abstract

In order to study the deformation characteristics of the Neogene hard soil-soft rock landslides in northwest China, two sets of centrifuge model tests were conducted to simulate the deformation process under the degraded state of shear zones, and the soil pressure and displacement-time curve during the deformation process of the landslides were obtained. The test results reveal that when the strength of the soft zone decreases, the main body of the hard soil-soft rock landslide is block-like. In the process of fast slide, the slip mass presents an overall translational slide, without complete liquefaction and disintegration. The attenuation of the dynamic friction strength of the slide zone is the main controlling factor in the distance and time of the movement. Moreover, the slide zones of hard soil-soft rock landslides with high stress underwent plastic flow deformations, which caused the horizontal stress concentration in the front part of the landslide, resulting in the horizontal movement of the overlying slip mass in the front part of the landslide and the extension to the back edge of the landslide, and multi-level horizontal slides occurred at the end.
- hard soil-soft rock,
- landslide,
- slide,
- centrifuge,
- model test

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References(62)

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Centrifuge model tests on the near-horizontal slide of hard soil-soft rock landslides

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Centrifuge model tests on the near-horizontal slide of hard soil-soft rock landslides

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