Laboratory Observation of Spalling Process Induced by Tangential Stress Concentration in Hard Rock Tunnel

doi:10.1061/(ASCE)GM.1943-5622.0001620

	Laboratory Observation of Spalling Process Induced by Tangential Stress Concentration in Hard Rock Tunnel
	Pan, Peng-Zhi 2,3; Miao, Shuting 1,3; Wu, Zhenhua 1,3; Feng, Xia-Ting 2; Shao, Changyue 1,3
刊名	INTERNATIONAL JOURNAL OF GEOMECHANICS
	2020-03-01
卷号	20 期号:3 页码:15
关键词	Rock spalling Fracture Digital image correlation Acoustic emission Deeply buried tunnel
ISSN号	1532-3641
DOI	10.1061/(ASCE)GM.1943-5622.0001620
英文摘要	A series of laboratory experiments were carried out to study the tangential stress concentration-induced spalling failure process of rock in an arch-shaped tunnel model under plane-strain loading condition by considering different geological conditions, i.e., a tunnel with and without a fracture nearby. Different fracture properties, i.e., open fracture and fracture with different infilling materials around the tunnel, were designed to study their influence on the spalling behavior. Digital image correlation (DIC) and acoustic emission (AE) were combined to track the spalling initiation and formation, which is characterized by the deformation field and energy release rate evolution. Spalling at two sidewalls of the tunnel without a fracture under concentrated tangential stress, and formation of various thin slabs and detachment from the free boundary due to the initiation and propagation of dilatant cracks were well reflected. Asymmetrical spalling failure was observed due to the existence of the fracture around the tunnel. It was found that the open fracture makes the spalling more concentrated and leads to larger failure extent and more intensity than the tunnel with a filled fracture.
资助项目	State Key Research Development Program of China[2017YFC0804203] ; National Natural Science Foundation of China[51621006] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences[QYZDB-SSW-DQC029]
WOS研究方向	Engineering
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000507919900012
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23380]
专题	中科院武汉岩土力学所
通讯作者	Pan, Peng-Zhi
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Northeastern Univ, Minist Educ Safe Min Deep Met Mines, Key Lab, Shenyang 110819, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Pan, Peng-Zhi,Miao, Shuting,Wu, Zhenhua,et al. Laboratory Observation of Spalling Process Induced by Tangential Stress Concentration in Hard Rock Tunnel[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2020,20(3):15.
APA	Pan, Peng-Zhi,Miao, Shuting,Wu, Zhenhua,Feng, Xia-Ting,&Shao, Changyue.(2020).Laboratory Observation of Spalling Process Induced by Tangential Stress Concentration in Hard Rock Tunnel.INTERNATIONAL JOURNAL OF GEOMECHANICS,20(3),15.
MLA	Pan, Peng-Zhi,et al."Laboratory Observation of Spalling Process Induced by Tangential Stress Concentration in Hard Rock Tunnel".INTERNATIONAL JOURNAL OF GEOMECHANICS 20.3(2020):15.