Progressive deformation and failure mechanism of loess fill slopes induce by rainfall: insights from flume model tests | |
Lu, Xingsheng2,3,5; Jiang, Yao2,4,5; Wang, Nianqin3; Shen, Huihui1 | |
刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT |
2023-10-01 | |
卷号 | 82期号:10页码:18 |
关键词 | Loess fill slope Flume model experiment Failure mode Failure mechanism |
ISSN号 | 1435-9529 |
DOI | 10.1007/s10064-023-03413-y |
英文摘要 | In recent years, many hill flattening and gully filling projects are carried out in the northwest of China to create land for construction. These projects have formed a number of loess fill slopes, which are prone to failure induced by rainfall. However, the failure mechanism of loess fill slope is not clear under rainfall conditions. In this study, a flume model experiment is carried out to reveal the characteristics and mechanism of failure loess fill slopes. The volumetric water content, soil pressure, and pore water pressure are analyzed to investigate the effect of rainfall infiltration on fill slope. The results shown that rain-induced failure mode of loess fill slopes exhibited progressive multi-stage sliding characteristics, including slope toe failure, crack development and penetration, local sliding, and overall misaligned sliding stages. The influence of the weak interface between the fill slope and the bedrock/natural slope on slope damage was revealed based on the hydromechanical characteristics. It is shown that the maximum migration rate of wetting front along the weak interface is about 5 times that in loess fill, and the weak interface becomes the dominant channel controlling the hydrological characteristics of the slope, accelerating the saturation of the fill loess slope and generating seepage forces towards the outside of the slope, causing the loess fill slope prone to shear slide along with weak interface. Therefore, we believe that the weak interface between the fill slope and the bedrock/natural slope surface plays an important role in slope failure. |
资助项目 | Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23090202] ; National Natural Science Foundation of China[U20A20112] ; National Natural Science Foundation of China[41790432] ; CAS Pioneer Hundred Talents Program ; China-Pakistan Joint Research Center on Earth Sciences |
WOS关键词 | INDUCED SHALLOW LANDSLIDES ; CRUST FORMATION ; NATURAL SLOPE ; SOIL-EROSION ; INFILTRATION ; EARTHQUAKE ; BEHAVIOR ; AREA ; FLOW |
WOS研究方向 | Engineering ; Geology |
语种 | 英语 |
出版者 | SPRINGER HEIDELBERG |
WOS记录号 | WOS:001071652400001 |
资助机构 | Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; CAS Pioneer Hundred Talents Program ; China-Pakistan Joint Research Center on Earth Sciences |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/57611] |
专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
通讯作者 | Jiang, Yao |
作者单位 | 1.Shaanxi Inst Geol Explorat, Sinochem Gen Adm Geol & Mines, Xian 710065, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710068, Peoples R China 4.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad 45320, Pakistan 5.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610299, Peoples R China |
推荐引用方式 GB/T 7714 | Lu, Xingsheng,Jiang, Yao,Wang, Nianqin,et al. Progressive deformation and failure mechanism of loess fill slopes induce by rainfall: insights from flume model tests[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2023,82(10):18. |
APA | Lu, Xingsheng,Jiang, Yao,Wang, Nianqin,&Shen, Huihui.(2023).Progressive deformation and failure mechanism of loess fill slopes induce by rainfall: insights from flume model tests.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,82(10),18. |
MLA | Lu, Xingsheng,et al."Progressive deformation and failure mechanism of loess fill slopes induce by rainfall: insights from flume model tests".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 82.10(2023):18. |
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