Study on supporting time of tunnel lining in thin-layered rock mass

doi:10.1088/1755-1315/861/4/042022

	Study on supporting time of tunnel lining in thin-layered rock mass
	Chen,Dongfang 1,3,4; Li,Chaoxiang 4; Su,Guoshao 3; Xu,Dingping 2; Yan,Zhigang 1; Li,Shaojun 2; Liu,Mingzhao 4
刊名	IOP Conference Series: Earth and Environmental Science
	2021-10-01
卷号	861 期号:4
关键词	Layered rock mass Soft rock Large deformation Supporting time Lining structure
ISSN号	1755-1307
DOI	10.1088/1755-1315/861/4/042022
英文摘要	Abstract The thin-layered rock mass of Baokang tunnel has the characteristics of large deformation and failure of soft rock under the excavation unloading. More seriously, a serious question is that the lining cracking is prominent. The cause of the cracking can be traced to different failure modes of the surrounding rock mass. Specifically, the rock layer on left arch spandrel is prone to bending failure due to the action of tangential stress, while the right-side wall is prone to sliding failure due to the action of higher shear stress. Furthermore, the lining cracking may beyond the ultimate compressive capacity when the loosely collapsed rock mass acted on the lining. According to the transversely isotropic characteristics of layered rock mass, the failure approach index (FAI) was selected to evaluate the damage and failure of thin shale. Meanwhile, the result of the example shows that this index can effectively characterize the failure characteristics of the thin-layered rock mass. Hence, the FAI was used as an evaluation index of the loose failure of layered rock mass. In order to determine the lining support time, the stability of the lining under the action by the loose rock mass was analyzed by the numerical simulation. As a result, the distance between the lining and the face should not be bigger than 120m. According to the Feedback through onsite construction, the lining cracks didn’t appear under this supporting time, which ensured the stability of the lining structure. The research methods and ideas can provide reference for the similar tunnel lining construction in thin-layered rock mass.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:EES_861_4_042022
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28438]
专题	中科院武汉岩土力学所
作者单位	1.The 2nd Engineering Co., Ltd. of China Railway 12th Bureau Group, Taiyuan, Shanxi 030024, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 3.Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University 4.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China
推荐引用方式 GB/T 7714	Chen,Dongfang,Li,Chaoxiang,Su,Guoshao,et al. Study on supporting time of tunnel lining in thin-layered rock mass[J]. IOP Conference Series: Earth and Environmental Science,2021,861(4).
APA	Chen,Dongfang.,Li,Chaoxiang.,Su,Guoshao.,Xu,Dingping.,Yan,Zhigang.,...&Liu,Mingzhao.(2021).Study on supporting time of tunnel lining in thin-layered rock mass.IOP Conference Series: Earth and Environmental Science,861(4).
MLA	Chen,Dongfang,et al."Study on supporting time of tunnel lining in thin-layered rock mass".IOP Conference Series: Earth and Environmental Science 861.4(2021).