Journal
LANDSLIDES
Volume 18, Issue 1, Pages 397-407Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10346-020-01538-9
Keywords
Baiyangwan landslide; Reactivation mechanism; Human engineering activities
Funding
- Geological Hazard Prevention and Control Project for Follow-up Work of the Three Gorges Reservoir region [0001212019CC60001]
- National Key RD program [2018YFC1504803]
- China Geological Survey [DD20190637]
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This paper presents details of the recently reactivated landslide in Wushan Town, Chongqing, China, showing that regional abundant rainfall, formation lithology, and tectonic effects were responsible for the formation of the ancient Baiyangwan landslide.
This paper presents details of the recently reactivated landslide in Wushan Town, Chongqing, China. The landslide was reactivated on July 17, 2019, by slope cutting, and thereafter, entered a state of imminent sliding. The landslide involved 4 million m(3)of rock and soil masses, thereby threatening National Road G348 and the safety of 588 residents in 136 households in Xiping Village and over 1000 residents in the Jinke Community. Field investigations, drilling, and in situ monitoring were performed to determine the landslide deformation characteristics and reactivation mechanism. The results show that the regional abundant rainfall, formation lithology, and tectonic effects were responsible for the formation of the ancient Baiyangwan landslide. Moreover, the building load on the rear and middle parts increased the sliding force. Open excavation at the toe decreased the anti-sliding force and directly promoted landslide reactivation. In particular, the groundwater table rise caused by gully filling in recent years also played a key role in the reactivation of the ancient landslide.
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