Influence of trees and shrubs on the stability of landslides induced by typhoon rainstorm

Xin YU; Wen NIE; Wenbin JIAN; Wei XIE; Song LU; Chunyang YE

doi:10.16031/j.cnki.issn.1003-8035.202111004

Volume 34 Issue 1

Feb. 2023

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The Chinese Journal of Geological Hazard and Control > 2023 > 34(1): 17-29. > DOI: 10.16031/j.cnki.issn.1003-8035.202111004

YU Xin，NIE Wen，JIAN Wenbin，et al. Influence of trees and shrubs on the stability of landslides induced by typhoon rainstorm[J]. The Chinese Journal of Geological Hazard and Control，2023，34(1): 17-29. DOI: 10.16031/j.cnki.issn.1003-8035.202111004

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Influence of trees and shrubs on the stability of landslides induced by typhoon rainstorm

Xin YU^{1, 2,},
Wen NIE^{1, 2, ,},
Wenbin JIAN¹,
Wei XIE²,
Song LU²,
Chunyang YE²

1.
Zijin School of Geology and Mining, Fuzhou University, Fuzhou, Fujian　350108, China
2.
Quanzhou Institute of Equipment Manufacturing, Haixi Research Institute, Chinese Academy of Sciences, Quanzhou, Fujian　362216, China

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Received Date: November 01, 2021
Revised Date: February 06, 2022
Available Online: October 20, 2022

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Abstract

Abstract

Under the condition of rainfall, trees and shrubs’ leaves can reduce the slope being washed and anchoring the slope by their roots, which had a positive effect on the slope stability. However, in typhoon rainstorm season, typhoon cracks the ground through swaying vegetation, strengthens the effect of rainfall infiltration, and further reduces the matrix suction and cohesion of soil, to reduce the stability of slope. In order to explore whether trees and shrubs have a positive or negative effect on slope during typhoon rainstorm season, this paper conducted quantitative analysis through indoor model experiment and numerical simulation, comparing the influence of no typhoon, typhoon and typhoon with different intensity on slope stability. It was found that the abrupt change time of pore water pressure curve and water content curve was advanced with the typhoon developing from nothing and becoming stronger from weak. At the same time, the effect of landslide with typhoon coupled rainstorm compared the simple rainfall, the area and volume of landslide damage were larger, and the stronger the typhoon grade was, the larger the area and volume of landslide damage were.Compared the stability coefficient of simulated slope by Geo-Studio numerical simulation software verifying, the initial stability coefficient was the largest and the decline speed was the slowest under the effect of no typhoon, the typhoon was bad and under the strong typhoon condition was the worst.
- typhoon rainstorm,
- Anxi County,
- landslide,
- trees,
- landslide identification,
- safety margin

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Influence of trees and shrubs on the stability of landslides induced by typhoon rainstorm

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