Evolution Process of Ancient Landslide Reactivation under the Action of Rainfall: Insights from Model Tests
Under rapid global climate change, the risk of ancient landslide reactivation induced by rainfall infiltration is increasing significantly. The contribution of cracks to the reactivation of ancient landslides, as an evolutionary product, is a topic that deserves attention; however, current research...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-02-01
|
| Series: | Water |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4441/16/4/583 |
| _version_ | 1797296819561037824 |
|---|---|
| author | Xiang Li Ruian Wu Bing Han Deguang Song Zhongkang Wu Wenbo Zhao Qijun Zou |
| author_facet | Xiang Li Ruian Wu Bing Han Deguang Song Zhongkang Wu Wenbo Zhao Qijun Zou |
| author_sort | Xiang Li |
| collection | DOAJ |
| description | Under rapid global climate change, the risk of ancient landslide reactivation induced by rainfall infiltration is increasing significantly. The contribution of cracks to the reactivation of ancient landslides, as an evolutionary product, is a topic that deserves attention; however, current research on this issue remains insufficient. In this study, taking the Woda landslide in the upper Jinsha River as a case study, we investigated the reactivation mechanisms of ancient landslides with and without cracks under rainfall based on model tests. The study showed that cracks influence the reactivation range and depth of ancient landslide. In cases where no cracks develop on ancient landslides, rainfall can only cause shallow sliding with failure concentrated at its front edge. Conversely, when cracks develop on ancient landslides, rainwater can quickly infiltrate into the sliding zone along the cracks and induce overall reactivation of the ancient landslide. Furthermore, the reactivation mechanism of ancient landslides without cracks is that the failure of ancient landslide foot results in progressive failure at the front of the ancient landslide. When cracks have developed at ancient landslides, the reactivation mechanism of which involves mid-rear ancient landslide creeping, tensile cracks develop on the mid-rear ancient landslide, with localized sliding at the front edge, tensile cracks extending, local sliding range extending, accelerated creeping, and progressive failure of the mid-rear ancient landslide. These findings shed light on how cracks influence rainfall-induced mechanisms of ancient landslide reactivation and hold great significance for advancing our understanding regarding these mechanisms. |
| first_indexed | 2024-03-07T22:10:21Z |
| format | Article |
| id | doaj.art-9991c765470949fcb8d4cbdb73637d7c |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-07T22:10:21Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-9991c765470949fcb8d4cbdb73637d7c2024-02-23T15:38:01ZengMDPI AGWater2073-44412024-02-0116458310.3390/w16040583Evolution Process of Ancient Landslide Reactivation under the Action of Rainfall: Insights from Model TestsXiang Li0Ruian Wu1Bing Han2Deguang Song3Zhongkang Wu4Wenbo Zhao5Qijun Zou6Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, ChinaInstitute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, ChinaChina Institute for Geo-Environment Monitoring, Beijing 100081, ChinaInstitute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, ChinaInstitute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, ChinaInstitute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, ChinaInstitute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, ChinaUnder rapid global climate change, the risk of ancient landslide reactivation induced by rainfall infiltration is increasing significantly. The contribution of cracks to the reactivation of ancient landslides, as an evolutionary product, is a topic that deserves attention; however, current research on this issue remains insufficient. In this study, taking the Woda landslide in the upper Jinsha River as a case study, we investigated the reactivation mechanisms of ancient landslides with and without cracks under rainfall based on model tests. The study showed that cracks influence the reactivation range and depth of ancient landslide. In cases where no cracks develop on ancient landslides, rainfall can only cause shallow sliding with failure concentrated at its front edge. Conversely, when cracks develop on ancient landslides, rainwater can quickly infiltrate into the sliding zone along the cracks and induce overall reactivation of the ancient landslide. Furthermore, the reactivation mechanism of ancient landslides without cracks is that the failure of ancient landslide foot results in progressive failure at the front of the ancient landslide. When cracks have developed at ancient landslides, the reactivation mechanism of which involves mid-rear ancient landslide creeping, tensile cracks develop on the mid-rear ancient landslide, with localized sliding at the front edge, tensile cracks extending, local sliding range extending, accelerated creeping, and progressive failure of the mid-rear ancient landslide. These findings shed light on how cracks influence rainfall-induced mechanisms of ancient landslide reactivation and hold great significance for advancing our understanding regarding these mechanisms.https://www.mdpi.com/2073-4441/16/4/583ancient landslidereactivation mechanismrainfallcrackmodel test |
| spellingShingle | Xiang Li Ruian Wu Bing Han Deguang Song Zhongkang Wu Wenbo Zhao Qijun Zou Evolution Process of Ancient Landslide Reactivation under the Action of Rainfall: Insights from Model Tests Water ancient landslide reactivation mechanism rainfall crack model test |
| title | Evolution Process of Ancient Landslide Reactivation under the Action of Rainfall: Insights from Model Tests |
| title_full | Evolution Process of Ancient Landslide Reactivation under the Action of Rainfall: Insights from Model Tests |
| title_fullStr | Evolution Process of Ancient Landslide Reactivation under the Action of Rainfall: Insights from Model Tests |
| title_full_unstemmed | Evolution Process of Ancient Landslide Reactivation under the Action of Rainfall: Insights from Model Tests |
| title_short | Evolution Process of Ancient Landslide Reactivation under the Action of Rainfall: Insights from Model Tests |
| title_sort | evolution process of ancient landslide reactivation under the action of rainfall insights from model tests |
| topic | ancient landslide reactivation mechanism rainfall crack model test |
| url | https://www.mdpi.com/2073-4441/16/4/583 |
| work_keys_str_mv | AT xiangli evolutionprocessofancientlandslidereactivationundertheactionofrainfallinsightsfrommodeltests AT ruianwu evolutionprocessofancientlandslidereactivationundertheactionofrainfallinsightsfrommodeltests AT binghan evolutionprocessofancientlandslidereactivationundertheactionofrainfallinsightsfrommodeltests AT deguangsong evolutionprocessofancientlandslidereactivationundertheactionofrainfallinsightsfrommodeltests AT zhongkangwu evolutionprocessofancientlandslidereactivationundertheactionofrainfallinsightsfrommodeltests AT wenbozhao evolutionprocessofancientlandslidereactivationundertheactionofrainfallinsightsfrommodeltests AT qijunzou evolutionprocessofancientlandslidereactivationundertheactionofrainfallinsightsfrommodeltests |