Failure mechanism of small-scale soil landslide and quantitative evaluation of rain-induced disaster factors in eastern Jiangxi
Objective This study aims to investigate the causes of typical soil landslides in eastern Jiangxi and assess the influence of rainfall on slope stability in the region. Methods Using the Ziwu landslide in Guangfeng District, Shangrao City, Jiangxi Province as a case study, this paper conducted a com...
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Editorial Department of Bulletin of Geological Science and Technology
2024-11-01
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| Series: | 地质科技通报 |
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| Online Access: | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.tb20230678 |
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| author | Qing LIU Jianjun GAN Hao CHEN Xiaoming LI Guobin ZHOU |
| author_facet | Qing LIU Jianjun GAN Hao CHEN Xiaoming LI Guobin ZHOU |
| author_sort | Qing LIU |
| collection | DOAJ |
| description | Objective This study aims to investigate the causes of typical soil landslides in eastern Jiangxi and assess the influence of rainfall on slope stability in the region. Methods Using the Ziwu landslide in Guangfeng District, Shangrao City, Jiangxi Province as a case study, this paper conducted a comprehensive analysis of rainfall data and surface displacement monitoring. A two-dimensional (2D) mechanical model was established using GeoStudio finite element software to simulate the deformation of small residual slope soil landslides under different rainfall conditions. This study analyzes the local rainfall characteristics, modeled four typical rainfall patterns across five scenarios, applied multiple linear regression to fit the data, and developed an I-D-Fs evaluation model. Results The results show that (1) the peak values of earth pressure and soil moisture content are 16.8 kPa and 16.3%, respectively, with a 3 to 5 days lag between rainfall onset and the increase in these values during the early stages of rainfall; (2) rainfall is the primary trigger for landslides, which progress through three distinct phases: Creeping of the front slope, pulling of the rear slope, and sudden sliding of the whole slope; and (3) rainfall patterns significantly impact slope stability, necessitating seasonal monitoring and early warning systems. During periods of low rainfall, uniform rainfall is the most detrimental, decreasing the stability coefficients by 2% compared to other patterns. During heave rainfall, frontal rainfall is the most hazardous, decreasing the stability coefficient by 8% compared to other patterns. Conclusion These results provide a scientific basis for the monitoring and early warning of shallow soil landslides. |
| format | Article |
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| issn | 2096-8523 |
| language | zho |
| publishDate | 2024-11-01 |
| publisher | Editorial Department of Bulletin of Geological Science and Technology |
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| series | 地质科技通报 |
| spelling | doaj-art-4c0401e633da486f9f786ea85ff025a92025-08-20T02:36:15ZzhoEditorial Department of Bulletin of Geological Science and Technology地质科技通报2096-85232024-11-0143623524310.19509/j.cnki.dzkq.tb20230678dzkjtb-43-6-235Failure mechanism of small-scale soil landslide and quantitative evaluation of rain-induced disaster factors in eastern JiangxiQing LIU0Jianjun GAN1Hao CHEN2Xiaoming LI3Guobin ZHOU4School of Hydraulic Engineering, Nanchang Institute of Technology, Nanchang 330096, ChinaSchool of Hydraulic Engineering, Nanchang Institute of Technology, Nanchang 330096, ChinaSchool of Hydraulic Engineering, Nanchang Institute of Technology, Nanchang 330096, ChinaHydrogeological Brigade of Jiangxi Geological Bureau, Nanchang 330096, ChinaHydrogeological Brigade of Jiangxi Geological Bureau, Nanchang 330096, ChinaObjective This study aims to investigate the causes of typical soil landslides in eastern Jiangxi and assess the influence of rainfall on slope stability in the region. Methods Using the Ziwu landslide in Guangfeng District, Shangrao City, Jiangxi Province as a case study, this paper conducted a comprehensive analysis of rainfall data and surface displacement monitoring. A two-dimensional (2D) mechanical model was established using GeoStudio finite element software to simulate the deformation of small residual slope soil landslides under different rainfall conditions. This study analyzes the local rainfall characteristics, modeled four typical rainfall patterns across five scenarios, applied multiple linear regression to fit the data, and developed an I-D-Fs evaluation model. Results The results show that (1) the peak values of earth pressure and soil moisture content are 16.8 kPa and 16.3%, respectively, with a 3 to 5 days lag between rainfall onset and the increase in these values during the early stages of rainfall; (2) rainfall is the primary trigger for landslides, which progress through three distinct phases: Creeping of the front slope, pulling of the rear slope, and sudden sliding of the whole slope; and (3) rainfall patterns significantly impact slope stability, necessitating seasonal monitoring and early warning systems. During periods of low rainfall, uniform rainfall is the most detrimental, decreasing the stability coefficients by 2% compared to other patterns. During heave rainfall, frontal rainfall is the most hazardous, decreasing the stability coefficient by 8% compared to other patterns. Conclusion These results provide a scientific basis for the monitoring and early warning of shallow soil landslides.https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.tb20230678soil landslidenumerical simulationdeformation mechanismmultiple linear regressioni-d-fs modeleastern jiangxi arearain-induced disaster factor |
| spellingShingle | Qing LIU Jianjun GAN Hao CHEN Xiaoming LI Guobin ZHOU Failure mechanism of small-scale soil landslide and quantitative evaluation of rain-induced disaster factors in eastern Jiangxi 地质科技通报 soil landslide numerical simulation deformation mechanism multiple linear regression i-d-fs model eastern jiangxi area rain-induced disaster factor |
| title | Failure mechanism of small-scale soil landslide and quantitative evaluation of rain-induced disaster factors in eastern Jiangxi |
| title_full | Failure mechanism of small-scale soil landslide and quantitative evaluation of rain-induced disaster factors in eastern Jiangxi |
| title_fullStr | Failure mechanism of small-scale soil landslide and quantitative evaluation of rain-induced disaster factors in eastern Jiangxi |
| title_full_unstemmed | Failure mechanism of small-scale soil landslide and quantitative evaluation of rain-induced disaster factors in eastern Jiangxi |
| title_short | Failure mechanism of small-scale soil landslide and quantitative evaluation of rain-induced disaster factors in eastern Jiangxi |
| title_sort | failure mechanism of small scale soil landslide and quantitative evaluation of rain induced disaster factors in eastern jiangxi |
| topic | soil landslide numerical simulation deformation mechanism multiple linear regression i-d-fs model eastern jiangxi area rain-induced disaster factor |
| url | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.tb20230678 |
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