Laboratory investigation into effect of bolt profiles on shear behaviors of bolt-grout interface under constant normal stiffness (CNS) conditions

doi:10.1016/j.jrmge.2020.03.010

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	Laboratory investigation into effect of bolt profiles on shear behaviors of bolt-grout interface under constant normal stiffness (CNS) conditions
	Cui, Guojian 1,2; Zhang, Chuanqing 1,2; Pan, Yibin 3; Deng, Liang 4; Zhou, Hui 1,2
	2020-12-01
发表期刊	JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
ISSN	1674-7755
卷号	12 期号:6 页码:1234-1248
摘要	Rock bolts have been widely used for stabilizing rock mass in geotechnical engineering. It is acknowledged that the bolt profiles have a sound influence on the support effect of the rock bolting system. Previous studies have proposed some optimal rib parameters (e.g. rib spacing); unfortunately, the interface shear behaviors are generally ignored. Therefore, determination of radial stress and radial displacement on the bolt-grout interface using traditional pull-out tests is not possible. The load-bearing capacity and deformation capacity vary as bolt profiles differ, suggesting that the support effect of the bolting system can be enhanced by optimizing bolt profiles. The aim of this study is to investigate the effects of bolt profiles (with/without ribs, rib spacing, and rib height) on the shear behaviors between the rock bolt and grout material using direct shear tests. Thereby, systematic interfacial shear tests with different bolt profiles were performed under both constant normal load (CNL) and constant normal stiffness (CNS) boundary conditions. The results suggested that rib spacing has a more marked influence on the interface shear behavior than rib height does, in particular at the post-yield stage. The results could facilitate our understanding of bolt-grout interface shear behavior under CNS conditions, and optimize selection of rock bolts under in situ rock conditions. (C) 2020 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V.
关键词	Bolt profile Constant normal stiffness (CNS) Shear test Interface failure characteristics Shear behaviors
DOI	10.1016/j.jrmge.2020.03.010
收录类别	SCI
语种	英语
资助项目	key projects of the Yalong River Joint Fund of the National Natural Science Foundation of China[U1865203] ; National Key Research and Development Program of China[2019YFC0605103] ; National Key Research and Development Program of China[2019YFC0605100] ; National Natural Science Foundation of China[51279201] ; Youth Innovation Promotion Association CAS
WOS研究方向	Engineering
WOS类目	Engineering, Geological
WOS记录号	WOS:000604647400008
出版者	SCIENCE PRESS
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.198/handle/2S6PX9GI/25459
专题	中科院武汉岩土力学所
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.PowerChina Huadong Engn Corp Ltd, Hangzhou 310014, Peoples R China 4.China Three Gorges Univ, Coll Civil Engn & Architecture, Yichang 443002, Peoples R China
第一作者单位	中科院武汉岩土力学所
推荐引用方式 GB/T 7714	Cui, Guojian,Zhang, Chuanqing,Pan, Yibin,et al. Laboratory investigation into effect of bolt profiles on shear behaviors of bolt-grout interface under constant normal stiffness (CNS) conditions[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2020,12(6):1234-1248.
APA	Cui, Guojian,Zhang, Chuanqing,Pan, Yibin,Deng, Liang,&Zhou, Hui.(2020).Laboratory investigation into effect of bolt profiles on shear behaviors of bolt-grout interface under constant normal stiffness (CNS) conditions.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,12(6),1234-1248.
MLA	Cui, Guojian,et al."Laboratory investigation into effect of bolt profiles on shear behaviors of bolt-grout interface under constant normal stiffness (CNS) conditions".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 12.6(2020):1234-1248.

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