Experimental study on mechanical properties of fractured rock mass under different anchoring modes

doi:10.1080/19648189.2018.1429321

	Experimental study on mechanical properties of fractured rock mass under different anchoring modes
	Lei, Guangfeng 1,3; Liu, Quansheng 1,2; Peng, Xingxin 1,3; Wei, Lai 1,3
刊名	EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
	2020-06-06
卷号	24 期号:7 页码:931-948
关键词	Experimental study fractured rock mass anchoring modes crack angles geotechnical engineering
ISSN号	1964-8189
DOI	10.1080/19648189.2018.1429321
英文摘要	To study the toughening effect and the anchoring mechanism of rock bolts, fractured rock specimens with different crack angles and different crack lengths are made of cement mortar. The prefabricated specimens are applied with different anchoring modes for reinforcement, containing no-anchoring, full-length bonded anchoring and pre-stressed anchoring. The uniaxial compression tests of fractured rock specimens under different anchoring modes are carried out, and then the mechanical properties and the failure modes of fractured rock specimens before and after anchoring are analysed. The 'Cavity Damage Effect' is defined and the test results show that the peak strength of the fractured specimens are roughly proportional to the crack inclination angle due to the 'Cavity Damage Effect', the crack is equivalent to a 'cavity damage' inside the prefabricated specimen if the opening of the crack is larger. The crack length can significantly affect the strength and deformation characteristics of no-anchoring specimens, while has little influence on the anchoring specimens. The full-length bonded anchoring and the pre-stressed anchoring can both significantly increase the mechanical parameters (the peak strength, residual strength and elastic modulus) of the specimens, enhance the resistance to deformation of fractured rock mass, and inhibit the expansion and coalescence of cracks.
资助项目	National Key Basic Research Program of China[2014CB046904] ; Surface Project of the Natural Science Foundation of China[51774267]
WOS研究方向	Engineering
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000537297200006
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24295]
专题	中科院武汉岩土力学所
通讯作者	Lei, Guangfeng
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China 2.Wuhan Univ, Sch Civil Engn, Key Lab Safety Geotech & Struct Engn Hubei Prov, Wuhan, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Lei, Guangfeng,Liu, Quansheng,Peng, Xingxin,et al. Experimental study on mechanical properties of fractured rock mass under different anchoring modes[J]. EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING,2020,24(7):931-948.
APA	Lei, Guangfeng,Liu, Quansheng,Peng, Xingxin,&Wei, Lai.(2020).Experimental study on mechanical properties of fractured rock mass under different anchoring modes.EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING,24(7),931-948.
MLA	Lei, Guangfeng,et al."Experimental study on mechanical properties of fractured rock mass under different anchoring modes".EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING 24.7(2020):931-948.