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01-09-2024 | Original Paper

Failure characteristics and mechanism of a layered phyllite landslide triggered by foot excavation in the Qinba Mountains of China

Authors: Yanbo Cao, Longsheng Deng, Wen Fan, Dong Tang, Jiale Chen, Bin Zheng

Published in: Bulletin of Engineering Geology and the Environment | Issue 9/2024

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Abstract

China’s Qinba Mountains Area presents a fragmented terrain, diverse geomorphology, and adverse geological structure. It is frequently impacted by severe geological hazards, especially in the weak rock strata of this area. The Yaobai landslide occurred on a slope with strong-moderately weathered phyllite and intensive structural planes, and foot excavation by human engineering activities triggered it. Large-scale physical model tests were carried out to elucidate the landslide’s motion traits and damage mechanism by considering the influence of structural planes’ inclination and orientation, filling conditions, slope foot excavation, etc. The results elucidated that the strength of the structural plane affected the ultimate angle of the slope foot and the location of the sliding plane; variation of structural plane orientation induced block rotations and increased the failure complexity; the mode of foot excavation affected the block slide sequence, locus, and distance. The landslide’s deformation failure model can be summarized into three types: progressive sliding failure, monolithic sliding failure, and rotary sliding failure. The research results can provide a basis for preventing and controlling such landslides in the Qinba Mountains Area.

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Literature
go back to reference Wei X, Fan W, Cao Y, Chai X, Bordoni M, Meisina C, Li J (2019a) Integrated experiments on field monitoring and hydro-mechanical modeling for determination of a triggering threshold of rainfall-induced shallow landslides. A case study in Ren River catchment, China. Bull Eng Geol Environ 79(1):513–532. https://doi.org/10.1007/s10064-019-01570-7CrossRef Wei X, Fan W, Cao Y, Chai X, Bordoni M, Meisina C, Li J (2019a) Integrated experiments on field monitoring and hydro-mechanical modeling for determination of a triggering threshold of rainfall-induced shallow landslides. A case study in Ren River catchment, China. Bull Eng Geol Environ 79(1):513–532. https://​doi.​org/​10.​1007/​s10064-019-01570-7CrossRef
Metadata
Title
Failure characteristics and mechanism of a layered phyllite landslide triggered by foot excavation in the Qinba Mountains of China
Authors
Yanbo Cao
Longsheng Deng
Wen Fan
Dong Tang
Jiale Chen
Bin Zheng
Publication date
01-09-2024
Publisher
Springer Berlin Heidelberg
Published in
Bulletin of Engineering Geology and the Environment / Issue 9/2024
Print ISSN: 1435-9529
Electronic ISSN: 1435-9537
DOI
https://doi.org/10.1007/s10064-024-03865-w

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