Laboratory Model Tests on Flow Erosion Failure Mechanism of a Slope Consisting of Anqing Group Clay Gravel Layer

doi:10.1155/2021/5559052

	Laboratory Model Tests on Flow Erosion Failure Mechanism of a Slope Consisting of Anqing Group Clay Gravel Layer
	Huang, Kang 1,2; Duan, Haipeng 3; Yi, Yuelin 3; Yu, Fei 2; Chen, Shanxiong 2; Dai, Zhangjun 2
刊名	GEOFLUIDS
	2021-03-15
卷号	2021 页码:14
ISSN号	1468-8115
DOI	10.1155/2021/5559052
英文摘要	The Anqing group clay gravel layer is a special geological body composed of gravel and clay. In excavation projects, involving this soil, such a gravel layer, is prone to slope collapse and instability under the influence of rainfall. To clearly understand the failure mechanism and influencing factors of clay gravel slopes, an indoor artificial rainfall erosion model testing was carried out to analyse the effect of various slope ratios, gravel contents, and rainfall intensities. The slope erosion damage form, runoff rate, infiltration rate, scoured material, and slope stability of the clay gravel slope were studied. The test results show that sloping surfaces of the gentle slope were mainly damaged by erosion, and the degree of damage gradually increased from the top to the bottom of the sloping surface; however, the stability of the surface was good. In the case of the sloping surface layer of the steep slope, large-scale landslides occurred, and the stability of the surface was poor. When the gravel content was small, the surface failure was manifested as a gully failure. When the gravel content was large, it was manifested as a "layer-by-layer sliding" failure. The degree of influence of different conditions on the stable runoff rate was as follows: rainfall intensity>slope ratio>gravel content. The degree of influence of the parameters on the stable infiltration rate was as follows: slope ratio>rainfall intensity>gravel content. On gentle slopes, the total mass of the scoured material was inversely proportional to the gravel content and directly proportional to the rainfall intensity; on a steep slope, the total mass of the scoured material increased with an increase in the rainfall intensity and gravel content. Moreover, the slope ratio was the key influencing factor to decide whether there was gravel in the scoured material.
资助项目	National Natural Science Foundation of China[41702337]
WOS研究方向	Geochemistry & Geophysics ; Geology
语种	英语
出版者	WILEY-HINDAWI
WOS记录号	WOS:000636296700003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25998]
专题	中科院武汉岩土力学所
通讯作者	Dai, Zhangjun
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Anhui Transportat Holding Grp Co Ltd, Hefei 230000, Peoples R China
推荐引用方式 GB/T 7714	Huang, Kang,Duan, Haipeng,Yi, Yuelin,et al. Laboratory Model Tests on Flow Erosion Failure Mechanism of a Slope Consisting of Anqing Group Clay Gravel Layer[J]. GEOFLUIDS,2021,2021:14.
APA	Huang, Kang,Duan, Haipeng,Yi, Yuelin,Yu, Fei,Chen, Shanxiong,&Dai, Zhangjun.(2021).Laboratory Model Tests on Flow Erosion Failure Mechanism of a Slope Consisting of Anqing Group Clay Gravel Layer.GEOFLUIDS,2021,14.
MLA	Huang, Kang,et al."Laboratory Model Tests on Flow Erosion Failure Mechanism of a Slope Consisting of Anqing Group Clay Gravel Layer".GEOFLUIDS 2021(2021):14.