Analysis of deformation and stability characteristics of a landslide in Southwest China under different rainfall and support conditions
Driven by rainfall and excavation, frequent landslides in southwestern China pose a serious threat to lives and property. This study uses advanced small baselines subset-interferometric synthetic aperture radar (SBAS-InSAR) time series analysis method and Sentinel-1 satellite data, combined with num...
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Frontiers Media S.A.
2025-03-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2025.1549911/full |
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| author | Yan Zhang Yan Zhang Yitao Hu Xiangsheng Zheng Yang Yu Haosen Guo Meiben Gao |
| author_facet | Yan Zhang Yan Zhang Yitao Hu Xiangsheng Zheng Yang Yu Haosen Guo Meiben Gao |
| author_sort | Yan Zhang |
| collection | DOAJ |
| description | Driven by rainfall and excavation, frequent landslides in southwestern China pose a serious threat to lives and property. This study uses advanced small baselines subset-interferometric synthetic aperture radar (SBAS-InSAR) time series analysis method and Sentinel-1 satellite data, combined with numerical simulation analysis, to study the deformation and stability characteristics of the Laoyingpan Village landslide under different rainfall and support measures conditions. The study results indicate that the Laoyingpan Village landslide has a 24° average slope, covering approximately 3.8 × 105 m2 with a volume of about 1.3 × 107 m3 and an “arm-chair” shape oriented at 106°. Excavation and rainfall are key factors impacting stability, causing significant deformation, especially on the left side with translational failure. SBAS-InSAR analysis indicates a maximum subsidence rate of 25 mm/month in lower slope sections. Under extreme rainfall, the stability coefficient dropped from 1.160 to 0.871, transitioning from stable to unstable before stabilizing after 60 h due to submergence. The implementation of anti-slide piles and anchor cables improved stability, reaching a coefficient of 1.745 with optimal parameters, recommending a combined support approach for effective landslide management. The study results can provide useful reference and guidance for the stability analysis and engineering prevention of the landslides. |
| format | Article |
| id | doaj-art-99d7b3ac29504ec59fdefde409ae2aa1 |
| institution | DOAJ |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Earth Science |
| spelling | doaj-art-99d7b3ac29504ec59fdefde409ae2aa12025-08-20T02:48:46ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-03-011310.3389/feart.2025.15499111549911Analysis of deformation and stability characteristics of a landslide in Southwest China under different rainfall and support conditionsYan Zhang0Yan Zhang1Yitao Hu2Xiangsheng Zheng3Yang Yu4Haosen Guo5Meiben Gao6State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan, ChinaState Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang, ChinaState Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang, ChinaSchool of Emergency Science, Xihua University, Chengdu, Sichuan, ChinaDriven by rainfall and excavation, frequent landslides in southwestern China pose a serious threat to lives and property. This study uses advanced small baselines subset-interferometric synthetic aperture radar (SBAS-InSAR) time series analysis method and Sentinel-1 satellite data, combined with numerical simulation analysis, to study the deformation and stability characteristics of the Laoyingpan Village landslide under different rainfall and support measures conditions. The study results indicate that the Laoyingpan Village landslide has a 24° average slope, covering approximately 3.8 × 105 m2 with a volume of about 1.3 × 107 m3 and an “arm-chair” shape oriented at 106°. Excavation and rainfall are key factors impacting stability, causing significant deformation, especially on the left side with translational failure. SBAS-InSAR analysis indicates a maximum subsidence rate of 25 mm/month in lower slope sections. Under extreme rainfall, the stability coefficient dropped from 1.160 to 0.871, transitioning from stable to unstable before stabilizing after 60 h due to submergence. The implementation of anti-slide piles and anchor cables improved stability, reaching a coefficient of 1.745 with optimal parameters, recommending a combined support approach for effective landslide management. The study results can provide useful reference and guidance for the stability analysis and engineering prevention of the landslides.https://www.frontiersin.org/articles/10.3389/feart.2025.1549911/fulllandslidedeformation analysisSBAS-InSARstabilityrainfallsupport measures |
| spellingShingle | Yan Zhang Yan Zhang Yitao Hu Xiangsheng Zheng Yang Yu Haosen Guo Meiben Gao Analysis of deformation and stability characteristics of a landslide in Southwest China under different rainfall and support conditions Frontiers in Earth Science landslide deformation analysis SBAS-InSAR stability rainfall support measures |
| title | Analysis of deformation and stability characteristics of a landslide in Southwest China under different rainfall and support conditions |
| title_full | Analysis of deformation and stability characteristics of a landslide in Southwest China under different rainfall and support conditions |
| title_fullStr | Analysis of deformation and stability characteristics of a landslide in Southwest China under different rainfall and support conditions |
| title_full_unstemmed | Analysis of deformation and stability characteristics of a landslide in Southwest China under different rainfall and support conditions |
| title_short | Analysis of deformation and stability characteristics of a landslide in Southwest China under different rainfall and support conditions |
| title_sort | analysis of deformation and stability characteristics of a landslide in southwest china under different rainfall and support conditions |
| topic | landslide deformation analysis SBAS-InSAR stability rainfall support measures |
| url | https://www.frontiersin.org/articles/10.3389/feart.2025.1549911/full |
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