Physical modelling of progressive sliding instability of loess-mudstone landslide

LI Shuanhu; QI Yue; WANG Xiaorong; GAO Yu; XING Yuanhao

doi:10.16562/j.cnki.0256-1492.2022082501

Marine Geology & Quaternary Geology > 2023 > 43(2): 200-207. > DOI: 10.16562/j.cnki.0256-1492.2022082501

LI Shuanhu，QI Yue，WANG Xiaorong，et al. Physical modelling of progressive sliding instability of loess-mudstone landslide[J]. Marine Geology & Quaternary Geology，2023，43(2)：200-207. DOI: 10.16562/j.cnki.0256-1492.2022082501

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Physical modelling of progressive sliding instability of loess-mudstone landslide

LI Shuanhu^1,2,3,,
QI Yue⁴,
WANG Xiaorong^1,2,3, ,,
GAO Yu^1,2,3,
XING Yuanhao^2,3

1.
School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
2.
Key Laboratory of Geological Hazards and Geotechnical Engineering Defense in Sandy and Drought Regions at Universities of Inner Mongolia Autonomous Region, Inner Mongolia University of Technology, Hohhot 010051, China
3.
Inner Mongolia Engineering Research Center of Geological Technology and Geotechnical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
4.
Ocean College, Zhejiang University, Zhoushan 316021, China

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Received Date: August 24, 2022
Revised Date: November 24, 2022
Available Online: April 19, 2023

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Abstract

Abstract

Loess landslide hazards in Northwest China is gradually gaining attention, especially loess-mudstone landslides, their destabilization mechanism and mechanical model have become a hot spot for research in the direction of geotechnical engineering. Using sliding deformation as an indicator, we studied the progressive instability model of loess-mudstone landslides, which can better serve the monitoring and early warning of loess-mudstone landslides. Direct water infiltration at the sliding interface was used to simulate the characteristics of progressive sliding instability of loess-mudstone landslides under the action of rainfall infiltration. Miniature pore water pressure and soil pressure sensors were arranged at the sliding interface and macroscopic deformation observation points were arranged at the sides and surface of landslide, to reveal the progressive sliding instability characteristics of the loess-mudstone landslide. The results show that the loess-mudstone landslide forms tension cracks at the top or middle of the landslide, and then the cracks gradually expand and divide the landslide, forming a three-stage instability model of "sliding - pulling - pushing". The modelling for progressive sliding instability of loess-mudstone landslides provided important scientific value for its monitoring, early warning, and engineering defense.
- loess-mudstone landslide,
- progressive sliding instability,
- physical model test,
- deformation characteristics,
- instability model

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References (26)

References

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Physical modelling of progressive sliding instability of loess-mudstone landslide