Physical Model Experiments on Water Infiltration and Failure Modes in Multi-Layered Slopes under Heavy Rainfall

doi:10.18805/LR-502

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所

	Physical Model Experiments on Water Infiltration and Failure Modes in Multi-Layered Slopes under Heavy Rainfall
	Tang Junfeng 1; Taro Uchimura 1; Huang Dong 2; Xie Jiren 3; Tao Shangning 1
刊名	APPLIED SCIENCES-BASEL
	2020
卷号	10 期号:10 页码:524-529
关键词	unsaturated soil capillary barrier multi-layer slope slope failure
DOI	10.18805/LR-502
通讯作者	Tao, Shangning(to.s.670@ms.saitama-u.ac.jp)
产权排序	2
文献子类	Article
英文摘要	Featured Application Authors are encouraged to provide a concise description of the specific application or a potential application of the work. This section is not mandatory. Abstract To assess the influence of an intermediate coarse layer on the slope stability during heavy rainfall, knowledge about water movement and how slope failure occurs is important. To clarify the characteristics of water infiltration in a multi-layered slope and assess its influence on the slope failure modes, eight groups of physical slope models were investigated. It was found that the unsaturated hydraulic conductivity in the coarse layer (5.54 x 10(-6) cm/s) was much lower than that of the fine layer (1.08 x 10(-4) cm/s), which resulted in the capillary barrier working at a lower water content. Intermediate coarse layers embedded between finer ones may initially confine the infiltration within the overlying finer layers, delaying the infiltration and eventually inducing a lateral flow diversion in the inclined slope. Two different failure modes occurred in the model experiments: surface sliding occurred at the toe in the single-layer slope group and piping occurred at the toe in the multi-layered slope as the rainfall water accumulated, was diverted along the interface, and then broke through in the downslope direction of the intermediate coarse layer. The lateral flow diversion caused by the capillary barrier and the tilt angle may be the major factors influencing the difference of the failure modes. The result also revealed that the coarser layers may have negative effects on the slope stability.
资助项目	Japanese Government ; Sichuan Science and Technology Program[2018JY0613] ; Japan Society for the Promotion of Science (JSPS) ; Japan Society for the Promotion of Science for Young Scientists
WOS关键词	LOOSE GRANULAR DEPOSITS ; CAPILLARY BARRIERS ; SOIL ; FLOWSLIDES ; LANDSLIDES ; MECHANISMS ; INITIATION ; SURFACE ; COVERS ; RUNOUT
WOS研究方向	Chemistry ; Engineering ; Materials Science ; Physics
语种	英语
出版者	MDPI
WOS记录号	WOS:000561264000010
资助机构	Japanese Government ; Sichuan Science and Technology Program ; Japan Society for the Promotion of Science (JSPS) ; Japan Society for the Promotion of Science for Young Scientists
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/35094]
专题	中国科学院水利部成都山地灾害与环境研究所
通讯作者	Tao Shangning
作者单位	1.Department of Civil & Environmental Engineering, Saitama University, Saitama 338-8570, Japan; 2.Institute of Mountain Hazards and Environment, Chinese Academy of Science, Chengdu 610041, China; 3.Department of Civil Engineering, Central South University, Changsha 410012, China
推荐引用方式 GB/T 7714	Tang Junfeng,Taro Uchimura,Huang Dong,et al. Physical Model Experiments on Water Infiltration and Failure Modes in Multi-Layered Slopes under Heavy Rainfall[J]. APPLIED SCIENCES-BASEL,2020,10(10):524-529.
APA	Tang Junfeng,Taro Uchimura,Huang Dong,Xie Jiren,&Tao Shangning.(2020).Physical Model Experiments on Water Infiltration and Failure Modes in Multi-Layered Slopes under Heavy Rainfall.APPLIED SCIENCES-BASEL,10(10),524-529.
MLA	Tang Junfeng,et al."Physical Model Experiments on Water Infiltration and Failure Modes in Multi-Layered Slopes under Heavy Rainfall".APPLIED SCIENCES-BASEL 10.10(2020):524-529.