Finite Analysis of Support Time for Tunnels in Strain-softening Rock Mass in Consideration of Fictitious Support Pressure

doi:10.1088/1742-6596/2068/1/012019

	Finite Analysis of Support Time for Tunnels in Strain-softening Rock Mass in Consideration of Fictitious Support Pressure
	Cui,Lan 2,3; Sheng,Qian 2,3; Niu,Zhenzhen 1
刊名	Journal of Physics: Conference Series
	2021-10-01
卷号	2068 期号:1
关键词	Fictitious pressure strain-softening rock mass support time delayed distance allowable deformation
ISSN号	1742-6588
DOI	10.1088/1742-6596/2068/1/012019
英文摘要	Abstract This study considers that the support time is quantitatively determined by the production limit of the displacement reduction factor and the support force under the extrusion conditions of the strain-softening rock mass. Therefore, the two indicators of the downlines under the support time are the displacement reduction factor of the support force and the yield limit. Based on the solution of the fictitious pressure proposed in an existing paper, the finite difference method is adopted to investigate the variations of the support force and displacement reduction factor versus the delayed distance considering different support types, initial stresses, and post-peak behaviours. The results show that on the one hand, the delay distance is suggested within 1 R0 in most tunnel cases; on the other hand, the factors have greater impact on rock-support interactions are rock mass and in-situ stress. Relatively contrast, softening and expansion behavior was not significant enough. Furthermore, it is also very important in composite support systems to assess the proportion of loads shared with the weakest part.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:JPCS_2068_1_012019
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28336]
专题	中科院武汉岩土力学所
作者单位	1.College of Marine Science and Technology, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China 2.University of Chinese Academy of Sciences, Beijing 100049, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
推荐引用方式 GB/T 7714	Cui,Lan,Sheng,Qian,Niu,Zhenzhen. Finite Analysis of Support Time for Tunnels in Strain-softening Rock Mass in Consideration of Fictitious Support Pressure[J]. Journal of Physics: Conference Series,2021,2068(1).
APA	Cui,Lan,Sheng,Qian,&Niu,Zhenzhen.(2021).Finite Analysis of Support Time for Tunnels in Strain-softening Rock Mass in Consideration of Fictitious Support Pressure.Journal of Physics: Conference Series,2068(1).
MLA	Cui,Lan,et al."Finite Analysis of Support Time for Tunnels in Strain-softening Rock Mass in Consideration of Fictitious Support Pressure".Journal of Physics: Conference Series 2068.1(2021).