A new joint morphology parameter considering the effects of micro-slope distribution of joint surface

doi:10.1016/j.enggeo.2020.105734

	A new joint morphology parameter considering the effects of micro-slope distribution of joint surface
	Bao, Han 3; Xu, Xunhui 3; Lan, Hengxing 1,2; Zhang, Guobiao 4; Yin, Peijie 3; Yan, Changgen 3; Xu, Jiangbo 3
刊名	ENGINEERING GEOLOGY
	2020-09-20
卷号	275 页码:11
关键词	Joint morphology parameter Shear behavior 3D printing Micro-slope distribution Climbing and shear-off behavior
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2020.105734
通讯作者	Xu, Xunhui(2018221044@chd.edu.cn) ; Lan, Hengxing(Lanhx@igsnrr.ac.cn)
英文摘要	An accurate description of the morphology of a joint surface is necessary to interpret its shear behavior. Accurately distinguishing the shear behavior differences may be difficult if the defined morphology parameter ignores the micro-slope distribution of the joint surface. The initial climbing angle was therefore defined and used to characterize the micro-slope distribution of the ascent section of joint profile, and a new method was proposed for calculating the morphology parameter, M. The parameter M embodies anisotropy, and the values of M for all profile lines, which are selected on the same joint at equal intervals in one direction, are log-normally distributed. To study the mechanical effects of M, joint replicas with three different strengths were 3D-printed using the scanned point cloud information of the natural joint. An anisotropic direct shear test was conducted to obtain the joint shear parameters in eight directions. The results indicated that the new morphology parameter accurately reflects the anisotropic shear behavior of the joint, and displayed tangential, positive linear, and power relations with shear strength, apparent cohesion, and friction angle, respectively. Furthermore, an index for evaluating the shear failure characteristics, established by using the new morphology parameter, can effectively distinguish the differences between the climbing and shear-off behavior on the joint. The parameter M, which considers the micro-slope distribution, can thus correctly represent the physical and mechanical properties of a joint, and its application is conducive to the precise quantification of joint shear behavior.
资助项目	National Natural Science Foundation of China[41790443] ; National Natural Science Foundation of China[41807246] ; National Natural Science Foundation of China[41927806] ; National Key R&D Program of China[2019YFC1520601] ; Fundamental Research Funds for the Central Universities, CHD[300102219217] ; Fundamental Research Funds for the Central Universities, CHD[300102219213]
WOS关键词	JRC-JCS MODEL ; SHEAR-STRENGTH ; ROCK JOINT ; ROUGHNESS COEFFICIENT ; BEHAVIOR ; MASS ; QUANTIFICATION ; FRACTURE ; GRANITE ; FAILURE
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000560722900015
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China ; Fundamental Research Funds for the Central Universities, CHD
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/158048]
专题	中国科学院地理科学与资源研究所
通讯作者	Xu, Xunhui; Lan, Hengxing
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, 11A Datun Rd, Beijing 100101, Peoples R China 2.Changan Univ, Sch Geol Engn & Geomat, Xian 710064, Peoples R China 3.Changan Univ, Sch Highway, Middle Sect Naner Huan Rd, Xian 710064, Shaanxi, Peoples R China 4.ShaanXi Land Construct Grp, Xian 710075, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Bao, Han,Xu, Xunhui,Lan, Hengxing,et al. A new joint morphology parameter considering the effects of micro-slope distribution of joint surface[J]. ENGINEERING GEOLOGY,2020,275:11.
APA	Bao, Han.,Xu, Xunhui.,Lan, Hengxing.,Zhang, Guobiao.,Yin, Peijie.,...&Xu, Jiangbo.(2020).A new joint morphology parameter considering the effects of micro-slope distribution of joint surface.ENGINEERING GEOLOGY,275,11.
MLA	Bao, Han,et al."A new joint morphology parameter considering the effects of micro-slope distribution of joint surface".ENGINEERING GEOLOGY 275(2020):11.