{"title":"Failure behaviors of rainfall-induced shallow landslides: insights from a novel large angle-adjustable plane shear apparatus","authors":"Jiren Xie, Jiaxun Chen, Kapila Ranjith Withanage, Taro Uchimura, Shifan Qiao, Bo Ruan, Tangzhe Gao, Dong Huang, Junfeng Tang, Kun Fang","doi":"10.1007/s10346-024-02271-3","DOIUrl":null,"url":null,"abstract":"<p>Rainfall-induced shallow landslides can occur rapidly after intense or prolonged heavy rainfall, especially in mountainous areas. In this study, failure behaviors of rainfall-induced shallow landslides are investigated using a novel large angle-adjustable plane shear (LAPS) apparatus. Details on the conception, features, and setup of the LAPS apparatus are first illustrated. Two series of tests are conducted with varying slope angles and water intensities to demonstrate the test processes. The results of the LAPS tests are analyzed according to the changes in displacement behaviors and water contents, as well as predictions of slope failure. The results show that the behaviors of rainfall-induced landslides were clearly observed during the LAPS tests, exhibiting three distinct stages: initial deformation, constant speed deformation, and accelerated deformation, which are consistent with the phenomenon from field cases. Moreover, the switch points of water content from stable to rapid growth stages gradually advanced with an increase in water intensity. The velocity behaviors observed in these tests displayed two distinct patterns, with earlier turning points observed as the slope angle or rainfall intensity increased. The LAPS apparatus provides a new tool for studying the failure behaviors of rainfall-induced shallow landslides.</p>","PeriodicalId":17938,"journal":{"name":"Landslides","volume":null,"pages":null},"PeriodicalIF":5.8000,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Landslides","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1007/s10346-024-02271-3","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Rainfall-induced shallow landslides can occur rapidly after intense or prolonged heavy rainfall, especially in mountainous areas. In this study, failure behaviors of rainfall-induced shallow landslides are investigated using a novel large angle-adjustable plane shear (LAPS) apparatus. Details on the conception, features, and setup of the LAPS apparatus are first illustrated. Two series of tests are conducted with varying slope angles and water intensities to demonstrate the test processes. The results of the LAPS tests are analyzed according to the changes in displacement behaviors and water contents, as well as predictions of slope failure. The results show that the behaviors of rainfall-induced landslides were clearly observed during the LAPS tests, exhibiting three distinct stages: initial deformation, constant speed deformation, and accelerated deformation, which are consistent with the phenomenon from field cases. Moreover, the switch points of water content from stable to rapid growth stages gradually advanced with an increase in water intensity. The velocity behaviors observed in these tests displayed two distinct patterns, with earlier turning points observed as the slope angle or rainfall intensity increased. The LAPS apparatus provides a new tool for studying the failure behaviors of rainfall-induced shallow landslides.
降雨诱发的浅层滑坡会在强降雨或长时间强降雨后迅速发生，尤其是在山区。本研究使用新型大角度可调平面剪切（LAPS）装置研究了降雨诱发的浅层滑坡的破坏行为。首先详细说明了 LAPS 设备的概念、特点和设置。为了演示试验过程，我们进行了两组不同坡角和水流强度的试验。根据位移行为和含水量的变化分析了 LAPS 试验的结果，并预测了斜坡的破坏情况。结果表明，在 LAPS 试验过程中，可以清晰地观察到降雨诱发的滑坡行为，表现出三个不同的阶段：初始变形、恒速变形和加速变形，这与实地案例中的现象一致。此外，随着水强度的增加，含水量从稳定阶段到快速增长阶段的切换点也逐渐提前。在这些试验中观察到的速度行为显示出两种截然不同的模式，随着坡角或降雨强度的增加，观察到的转折点也会提前。LAPS 仪器为研究降雨诱发的浅层滑坡的破坏行为提供了一种新的工具。
期刊介绍：
Landslides are gravitational mass movements of rock, debris or earth. They may occur in conjunction with other major natural disasters such as floods, earthquakes and volcanic eruptions. Expanding urbanization and changing land-use practices have increased the incidence of landslide disasters. Landslides as catastrophic events include human injury, loss of life and economic devastation and are studied as part of the fields of earth, water and engineering sciences. The aim of the journal Landslides is to be the common platform for the publication of integrated research on landslide processes, hazards, risk analysis, mitigation, and the protection of our cultural heritage and the environment. The journal publishes research papers, news of recent landslide events and information on the activities of the International Consortium on Landslides.
- Landslide dynamics, mechanisms and processes
- Landslide risk evaluation: hazard assessment, hazard mapping, and vulnerability assessment
- Geological, Geotechnical, Hydrological and Geophysical modeling
- Effects of meteorological, hydrological and global climatic change factors
- Monitoring including remote sensing and other non-invasive systems
- New technology, expert and intelligent systems
- Application of GIS techniques
- Rock slides, rock falls, debris flows, earth flows, and lateral spreads
- Large-scale landslides, lahars and pyroclastic flows in volcanic zones
- Marine and reservoir related landslides
- Landslide related tsunamis and seiches
- Landslide disasters in urban areas and along critical infrastructure
- Landslides and natural resources
- Land development and land-use practices
- Landslide remedial measures / prevention works
- Temporal and spatial prediction of landslides
- Early warning and evacuation
- Global landslide database
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