Characteristics and causes analysis of Nandianzi landslide in Lingtai County, Gansu Province
On October 3, 2021, a large landslide occurred at the loess-mudstone interface in Nandianzi, Lingtai, its successful early warning measures preventing casualties. In order to investigate the occurrence mechanism behind the Nandianzi landslide, a basic investigation was conducted, covering the topogr...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of The Chinese Journal of Geological Hazard and Control
2023-12-01
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| Series: | Zhongguo dizhi zaihai yu fangzhi xuebao |
| Subjects: | |
| Online Access: | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202305042 |
| _version_ | 1797303303804026880 |
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| author | Jiakai TANG Weijiang WU Tao LIU Xing SU Chaodong WAN Guoxin ZHANG Yapeng AN Zugang LI |
| author_facet | Jiakai TANG Weijiang WU Tao LIU Xing SU Chaodong WAN Guoxin ZHANG Yapeng AN Zugang LI |
| author_sort | Jiakai TANG |
| collection | DOAJ |
| description | On October 3, 2021, a large landslide occurred at the loess-mudstone interface in Nandianzi, Lingtai, its successful early warning measures preventing casualties. In order to investigate the occurrence mechanism behind the Nandianzi landslide, a basic investigation was conducted, covering the topography, lithology, hydrogeological conditions, and human engineering activities related to the landslide. Based on the characteristics and differences of the crack development of the landslide, the landslide mass was divided into five blocks. The characteristics of each block were thoroughly analyzed through qualitative and quantitative analysis. The specific sliding situation of different parts of the landslide was analyzed, and further evidence was provided for the objective rationality of landslide classification and zoning, as well as the analysis of landslide mechanisms. Ultimately, it is concluded that the main causes of landslide disasters are as follows: (1) Large-scale excavation and earthwork activities at the lower and middle parts of the slope and the toe, leading to slope steepening and reduced resistance to sliding; (2) Formation of slope depressions, causing inadequate drainage and softening of the rock layer contact surface, thereby diminishing slope stability; and (3) Prolonged heavy rainfall that leads to instability and causes significant loss. While the Nandianzi landslide in Lintai county represents a successfully averted disaster, it serves as a noteworthy case study and a cautionary example for scientifically and standardizedly approaching urban construction and rural revitalization in China. This study holds significance value for monitoring, early warning,risk assessmen, and engineering treatment in comparable regions. |
| first_indexed | 2024-03-07T23:50:58Z |
| format | Article |
| id | doaj.art-4b0f37934e4b4f8d87d0e690eb075b4c |
| institution | Directory Open Access Journal |
| issn | 1003-8035 |
| language | zho |
| last_indexed | 2024-03-07T23:50:58Z |
| publishDate | 2023-12-01 |
| publisher | Editorial Office of The Chinese Journal of Geological Hazard and Control |
| record_format | Article |
| series | Zhongguo dizhi zaihai yu fangzhi xuebao |
| spelling | doaj.art-4b0f37934e4b4f8d87d0e690eb075b4c2024-02-19T07:14:15ZzhoEditorial Office of The Chinese Journal of Geological Hazard and ControlZhongguo dizhi zaihai yu fangzhi xuebao1003-80352023-12-01346202910.16031/j.cnki.issn.1003-8035.202305042202305042Characteristics and causes analysis of Nandianzi landslide in Lingtai County, Gansu ProvinceJiakai TANG0Weijiang WU1Tao LIU2Xing SU3Chaodong WAN4Guoxin ZHANG5Yapeng AN6Zugang LI7Geological Hazards Prevention Institute, Gansu Academy of Sciences, Lanzhou, Gansu 730000, ChinaGeological Hazards Prevention Institute, Gansu Academy of Sciences, Lanzhou, Gansu 730000, ChinaGeological Hazards Prevention Institute, Gansu Academy of Sciences, Lanzhou, Gansu 730000, ChinaGeological Hazards Prevention Institute, Gansu Academy of Sciences, Lanzhou, Gansu 730000, China146th Team of Gansu Coalfield Geology Bureau, Pingliang, Gansu 744000, ChinaGeological Hazards Prevention Institute, Gansu Academy of Sciences, Lanzhou, Gansu 730000, ChinaCollege of Water Resources and Hydropower, Gansu Agricultural University, Lanzhou, Gansu 730030, ChinaGeological Hazards Prevention Institute, Gansu Academy of Sciences, Lanzhou, Gansu 730000, ChinaOn October 3, 2021, a large landslide occurred at the loess-mudstone interface in Nandianzi, Lingtai, its successful early warning measures preventing casualties. In order to investigate the occurrence mechanism behind the Nandianzi landslide, a basic investigation was conducted, covering the topography, lithology, hydrogeological conditions, and human engineering activities related to the landslide. Based on the characteristics and differences of the crack development of the landslide, the landslide mass was divided into five blocks. The characteristics of each block were thoroughly analyzed through qualitative and quantitative analysis. The specific sliding situation of different parts of the landslide was analyzed, and further evidence was provided for the objective rationality of landslide classification and zoning, as well as the analysis of landslide mechanisms. Ultimately, it is concluded that the main causes of landslide disasters are as follows: (1) Large-scale excavation and earthwork activities at the lower and middle parts of the slope and the toe, leading to slope steepening and reduced resistance to sliding; (2) Formation of slope depressions, causing inadequate drainage and softening of the rock layer contact surface, thereby diminishing slope stability; and (3) Prolonged heavy rainfall that leads to instability and causes significant loss. While the Nandianzi landslide in Lintai county represents a successfully averted disaster, it serves as a noteworthy case study and a cautionary example for scientifically and standardizedly approaching urban construction and rural revitalization in China. This study holds significance value for monitoring, early warning,risk assessmen, and engineering treatment in comparable regions.https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202305042loess landslidesliding characteristicscausesuccessful risk aversiongroup measurement and mass prevention |
| spellingShingle | Jiakai TANG Weijiang WU Tao LIU Xing SU Chaodong WAN Guoxin ZHANG Yapeng AN Zugang LI Characteristics and causes analysis of Nandianzi landslide in Lingtai County, Gansu Province Zhongguo dizhi zaihai yu fangzhi xuebao loess landslide sliding characteristics cause successful risk aversion group measurement and mass prevention |
| title | Characteristics and causes analysis of Nandianzi landslide in Lingtai County, Gansu Province |
| title_full | Characteristics and causes analysis of Nandianzi landslide in Lingtai County, Gansu Province |
| title_fullStr | Characteristics and causes analysis of Nandianzi landslide in Lingtai County, Gansu Province |
| title_full_unstemmed | Characteristics and causes analysis of Nandianzi landslide in Lingtai County, Gansu Province |
| title_short | Characteristics and causes analysis of Nandianzi landslide in Lingtai County, Gansu Province |
| title_sort | characteristics and causes analysis of nandianzi landslide in lingtai county gansu province |
| topic | loess landslide sliding characteristics cause successful risk aversion group measurement and mass prevention |
| url | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202305042 |
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