Effects of bolt profile and grout mixture on shearing behaviors of bolt-grout interface

doi:10.1016/j.jrmge.2019.10.004

	Effects of bolt profile and grout mixture on shearing behaviors of bolt-grout interface
	Zhang, Chuanqing 3,4; Cui, Guojian 3,4; Chen, Xiangrong 2; Zhou, Hui 3,4; Deng, Liang 1
刊名	JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
	2020-04-01
卷号	12 期号:2 页码:242-255
关键词	Bolt-grout interface Direct shear test Shear behavior Failure mode Bolt profiles
ISSN号	1674-7755
DOI	10.1016/j.jrmge.2019.10.004
英文摘要	Shearing behavior and failure mechanism of bolt-grout interface are of great significance for load transfer capacity and design of rock bolting system. In this paper, direct shear tests on bolt-grout interfaces under constant normal load (CNL) conditions were conducted to investigate the effects of bolt profile (i.e. rib spacing and rib height) and grout mixture on the bolt-grout interface in terms of mechanical behaviors and failure modes. Test results showed that the peak shear strength and the deformation capacity of the bolt-grout interface are highly dependent on the bolt profile and grout mixture, suggesting that bolt performances can be optimized, which were unfortunately ignored in the previous studies. A new interface failure mode, i.e. 'sheared-crush' mode, was proposed, which was characterized by progressive crush failure of the grout asperities between steel ribs during shearing. It was shown that the interface failure mode mainly depends on the normal stress level and rib spacing, compared with the rib height and grout mixture for the range of tested parameters in this study. (C) 2020 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
资助项目	Key Projects of the Yalong River Joint Fund of the National Natural Science Foundation of China[U1865203] ; National Natural Science Foundation of China[51279201] ; Special project of the National Natural Science Foundation of China[41941018] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS研究方向	Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000522675200003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23837]
专题	中科院武汉岩土力学所
通讯作者	Cui, Guojian
作者单位	1.China Three Gorges Univ, Coll Civil Engn & Architecture, Yichang 443002, Peoples R China 2.PowerChina Huadong Engn Corp Ltd, Hangzhou 310014, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Chuanqing,Cui, Guojian,Chen, Xiangrong,et al. Effects of bolt profile and grout mixture on shearing behaviors of bolt-grout interface[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2020,12(2):242-255.
APA	Zhang, Chuanqing,Cui, Guojian,Chen, Xiangrong,Zhou, Hui,&Deng, Liang.(2020).Effects of bolt profile and grout mixture on shearing behaviors of bolt-grout interface.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,12(2),242-255.
MLA	Zhang, Chuanqing,et al."Effects of bolt profile and grout mixture on shearing behaviors of bolt-grout interface".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 12.2(2020):242-255.