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The Hongchi landslide triggered by heavy rainfall from Super Typhoon In-Fa on 25 July 2021 in Hangzhou City, Zhejiang Province, China
Abstract On 25 July 2021, a landslide caused by Super Typhoon In-Fa struck the village of Hongchi in Hangzhou City, Zhejiang Province, China. The volume of the landslide was about 5 × $ 10^{4} $ $ m^{3} $. It blocked a county road for approximately 150 m and damaged six residential houses. The landslide had clear joint planes on both sides, which formed a wedge shape with an “undrained” boundary. The sliding mass was mainly composed of silty clay. To examine the initiation mechanism of the landslide, a detailed field investigation was conducted. It was found that the landslide had been affected by a fault crossing the main scarp, creating a quick seepage channel for the rainwater infiltrating into the sliding mass such that high pore-water pressure could be formed at the back of the sliding mass. Furthermore, the mechanisms of this landslide then were investigated by the particle size analysis, direct shear tests, and slope stability analysis. The geotechnical nature of the silty clay in the sliding zone may also have controlled the motion features of the landslide.
The Hongchi landslide triggered by heavy rainfall from Super Typhoon In-Fa on 25 July 2021 in Hangzhou City, Zhejiang Province, China
Abstract On 25 July 2021, a landslide caused by Super Typhoon In-Fa struck the village of Hongchi in Hangzhou City, Zhejiang Province, China. The volume of the landslide was about 5 × $ 10^{4} $ $ m^{3} $. It blocked a county road for approximately 150 m and damaged six residential houses. The landslide had clear joint planes on both sides, which formed a wedge shape with an “undrained” boundary. The sliding mass was mainly composed of silty clay. To examine the initiation mechanism of the landslide, a detailed field investigation was conducted. It was found that the landslide had been affected by a fault crossing the main scarp, creating a quick seepage channel for the rainwater infiltrating into the sliding mass such that high pore-water pressure could be formed at the back of the sliding mass. Furthermore, the mechanisms of this landslide then were investigated by the particle size analysis, direct shear tests, and slope stability analysis. The geotechnical nature of the silty clay in the sliding zone may also have controlled the motion features of the landslide.
The Hongchi landslide triggered by heavy rainfall from Super Typhoon In-Fa on 25 July 2021 in Hangzhou City, Zhejiang Province, China
Wang, Fawu (author) / Peng, Xingliang (author) / Zhu, Guolong (author) / Nam, Kounghoon (author) / Chen, Ye (author) / Yan, Kongming (author)
2022
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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