A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu county
How to identify deformed landslides in advance and conduct early risk assessments on them has become a research hotspot in the field of geological disaster prevention and control. In response to the above problems, the Jiangdingya landslide in the Bailong River Basin in Zhouqu is taken as a back ana...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Hydrogeology & Engineering Geology
2021-11-01
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| Series: | Shuiwen dizhi gongcheng dizhi |
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| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202104028 |
| _version_ | 1811169593609158656 |
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| author | Xudong HAN Jie FU Yanyan LI Gaofeng WANG Chen CAO |
| author_facet | Xudong HAN Jie FU Yanyan LI Gaofeng WANG Chen CAO |
| author_sort | Xudong HAN |
| collection | DOAJ |
| description | How to identify deformed landslides in advance and conduct early risk assessments on them has become a research hotspot in the field of geological disaster prevention and control. In response to the above problems, the Jiangdingya landslide in the Bailong River Basin in Zhouqu is taken as a back analysis case, and a comprehensive study of the early identification and risk assessment of the landslide is carried out. In this paper, a full-process analysis method is proposed, which combine the small baseline subset interferometric synthetic aperture radar (SBAS-InSAR) technology interpretation, geo-mechanical analysis and dynamic process simulation. The research results show that the SABS-InSAR technology interpretation can effectively identify the range of the Jiangdingya landslide and its early deformation. It may be preliminarily determined that the failure mode of the Jiangdingya landslide is trailed and the plane characteristics of the landslide body is generally about 680 m in length and 210 m in width. Based on the early identification information and through geo-mechanical analysis, it is finally identified that the instability problem of the Jiangdingya landslide is a typical deformation problem of the front edge of the old accumulation layer landslide. The failure mode is the traction slip failure, the average thickness of the landslide body is in about 35 m, the overall slope of the sliding bed is relatively slow, and the moving speed is not large after instability. On the basis of the above analyses, a Coulomb friction model that conformed to the sliding friction characteristics of the Jiangdingya landslide body is selected. Based on the depth integral continuum equation, the dynamic process of the Jiangdingya landslide body is calculated and the speed of the landslide body is monitored. In terms of velocity monitoring curves and accumulation pattern, the sliding velocity of the landslide body is not large, the maximum value is about 2.2 m/s, the overall performance is pushing the Bailong River channel, and the possibility of blocking the river is relatively small. In addition, when the displacement of the front edge of the Jiangdingya landslide body is completed, the speed of the landslide body from the front edge to the rear edge quickly drope to zero, and the movement process is characterized by the traction movement. The analysis results of the Jiangdingya landslide in this paper are consistent with the actual event of the Jiangdingya landslide. The comprehensive analysis method and research model can provide a good reference for the early identification and risk assessment of similar landslides in the Bailong River Basin in Zhouqu county. |
| first_indexed | 2024-04-10T16:46:04Z |
| format | Article |
| id | doaj.art-f63270c72cfa4db09092f7b5d9fc45fb |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:46:04Z |
| publishDate | 2021-11-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-f63270c72cfa4db09092f7b5d9fc45fb2023-02-08T01:28:48ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652021-11-0148618018610.16030/j.cnki.issn.1000-3665.202104028202104028A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu countyXudong HAN0Jie FU1Yanyan LI2Gaofeng WANG3Chen CAO4Innovation Center for Geological Environment Monitoring Technology of the Ministry of Natural Resources, Center for Hydrogeology and Environment, CGS, Baoding, Hebei 071051, ChinaInnovation Center for Geological Environment Monitoring Technology of the Ministry of Natural Resources, Center for Hydrogeology and Environment, CGS, Baoding, Hebei 071051, ChinaFaculty of Urban Construction, Beijing University of Technology, Beijing 100124, ChinaChongqing Field Scientific Observation and Research Platform for Geological Hazards in the Three Gorges Reservoir Area of the Ministry of Natural Resources, Center for Hydrogeology and Environment, CGS, Chongqing 404700, ChinaCollege of Construction Engineering, Jilin University, Changchun, Jilin 130026, ChinaHow to identify deformed landslides in advance and conduct early risk assessments on them has become a research hotspot in the field of geological disaster prevention and control. In response to the above problems, the Jiangdingya landslide in the Bailong River Basin in Zhouqu is taken as a back analysis case, and a comprehensive study of the early identification and risk assessment of the landslide is carried out. In this paper, a full-process analysis method is proposed, which combine the small baseline subset interferometric synthetic aperture radar (SBAS-InSAR) technology interpretation, geo-mechanical analysis and dynamic process simulation. The research results show that the SABS-InSAR technology interpretation can effectively identify the range of the Jiangdingya landslide and its early deformation. It may be preliminarily determined that the failure mode of the Jiangdingya landslide is trailed and the plane characteristics of the landslide body is generally about 680 m in length and 210 m in width. Based on the early identification information and through geo-mechanical analysis, it is finally identified that the instability problem of the Jiangdingya landslide is a typical deformation problem of the front edge of the old accumulation layer landslide. The failure mode is the traction slip failure, the average thickness of the landslide body is in about 35 m, the overall slope of the sliding bed is relatively slow, and the moving speed is not large after instability. On the basis of the above analyses, a Coulomb friction model that conformed to the sliding friction characteristics of the Jiangdingya landslide body is selected. Based on the depth integral continuum equation, the dynamic process of the Jiangdingya landslide body is calculated and the speed of the landslide body is monitored. In terms of velocity monitoring curves and accumulation pattern, the sliding velocity of the landslide body is not large, the maximum value is about 2.2 m/s, the overall performance is pushing the Bailong River channel, and the possibility of blocking the river is relatively small. In addition, when the displacement of the front edge of the Jiangdingya landslide body is completed, the speed of the landslide body from the front edge to the rear edge quickly drope to zero, and the movement process is characterized by the traction movement. The analysis results of the Jiangdingya landslide in this paper are consistent with the actual event of the Jiangdingya landslide. The comprehensive analysis method and research model can provide a good reference for the early identification and risk assessment of similar landslides in the Bailong River Basin in Zhouqu county.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202104028accumulation landlslideearly identificationgeo-mechanical analysisdynamic process simulation |
| spellingShingle | Xudong HAN Jie FU Yanyan LI Gaofeng WANG Chen CAO A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu county Shuiwen dizhi gongcheng dizhi accumulation landlslide early identification geo-mechanical analysis dynamic process simulation |
| title | A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu county |
| title_full | A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu county |
| title_fullStr | A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu county |
| title_full_unstemmed | A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu county |
| title_short | A study of the early identification and risk assessment of the Jiangdingya landslide in Zhouqu county |
| title_sort | study of the early identification and risk assessment of the jiangdingya landslide in zhouqu county |
| topic | accumulation landlslide early identification geo-mechanical analysis dynamic process simulation |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202104028 |
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