Why the Xintan landslide was not triggered by the heaviest historical rainfall: Mechanism and review
文献类型：期刊论文
| 作者 | Chen, Hongran1,3; Qin, Siqing1,2,3; Xue, Lei1,3; Xu, Chao1,2,3 |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2021-12-05 |
| 卷号 | 294页码:10 |
| 关键词 | Landslides Rainfall Locked segment Displacement acceleration Residual-strength point |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2021.106379 |
| 英文摘要 | Heavy rainfall has long been recognized as a key factor in the triggering of landslides, as large amounts of precipitation generally have strong weakening effects on anti-sliding forces along slip surfaces. However, it remains to be understood why the catastrophic Xintan landslide in China was triggered by only moderate rainfall rather than the area's heaviest historical downpour. In this study, we demonstrate that a locked segment (a natural sustaining arch) at Jiangjiapo on the Xintan slope strongly restrained the movement of the sliding mass and was the key internal factor governing the slope stability. When such a locked segment is damaged enough to reach its volume-expansion point, slip displacement starts to accelerate. When its peak-stress point is attained, this displacement decelerates due to the homogenization effect of resistance. Once the homogenization process concludes, the displacement acceleration resumes, and slope instability occurs soon after reaching its residual-strength point. A post-factum analysis of the Xintan landslide indicated that the damage behavior of a locked segment from the volume-expansion point follows specific mechanical rules. The evolution of a locked-segment-dominated slope toward instability is caused by the progressive damage of the locked segment, which is promoted by various external factors including rainfall. Such factors can neither alter the inherent mechanical rules nor trigger a landslide before the locked segment fails. This mechanism explains the seemingly paradoxical relationship between precipitation and the occurrence of landslides, and these findings can greatly improve our understanding of landslide mechanisms. |
| WOS关键词 | PROGRESSIVE FAILURE ; RESPONSE RATIO ; XILING GORGE ; ROCK SLOPES ; SOIL ; ROCKSLIDE ; MOVEMENT ; MODEL ; AREA |
| 资助项目 | National Natural Science Foundation of China[42090052] ; National Natural Science Foundation of China[41977249] ; National Natural Science Foundation of China[U1704243] ; China Postdoctoral Science Foundation[2018M640181] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000703066300009 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102707]  |
| 专题 | 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
| 通讯作者 | Qin, Siqing |
| 作者单位 | 1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Hongran,Qin, Siqing,Xue, Lei,et al. Why the Xintan landslide was not triggered by the heaviest historical rainfall: Mechanism and review[J]. ENGINEERING GEOLOGY,2021,294:10. |
| APA | Chen, Hongran,Qin, Siqing,Xue, Lei,&Xu, Chao.(2021).Why the Xintan landslide was not triggered by the heaviest historical rainfall: Mechanism and review.ENGINEERING GEOLOGY,294,10. |
| MLA | Chen, Hongran,et al."Why the Xintan landslide was not triggered by the heaviest historical rainfall: Mechanism and review".ENGINEERING GEOLOGY 294(2021):10. |
入库方式： OAI收割
来源：地质与地球物理研究所
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