Use of the equivalent continuum approach to model the behavior of a rock mass containing an interlayer shear weakness zone in an underground cavern excavation

doi:10.1016/j.tust.2014.12.006

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Use of the equivalent continuum approach to model the behavior of a rock mass containing an interlayer shear weakness zone in an underground cavern excavation
	Jiang, Quan 1; Xu, Ding-Ping 1; Feng, Xia-Ting1 ; Cui, Yu-Jun 2
刊名	TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
	2015
卷号	47 页码:35-51
关键词	Mathematical model Virtual rock mass Transverse isotropy Rock-soil composite material Deformation prediction
ISSN号	0886-7798
DOI	10.1016/j.tust.2014.12.006
英文摘要	An interlayer shear weakness zone (ISWZ) is a weak zonal geotechnical system of variable thickness that occurs between different rock strata (e.g., tuff and basalt). At the site of the future Baihetan hydropower station, Sichuan Province, China, because of the relatively poor ISWZ mechanical properties, the overall stability of the underground powerhouse is potentially at risk. In this study, to evaluate the effects of ISWZs on the stability of the future underground powerhouse by means of three-dimensional continuum modeling (3-D continuum modeling), the concept of a virtual rock mass composed of ISWZ and host rock is proposed. An equivalent continuum approach, including a rock soil composite material (RSCM) model, is elaborated, with corresponding expressions for the input parameters. Comparisons were made between the predictions from the RSCM model, the results obtained by an analytic method, and existing data from physical model tests. The comparison showed that all three types of information showed good consistency in terms of failure mode and strength. This indicates the suitability of the RSCM model for describing the behavior of a rock mass containing discontinuities. Furthermore, comparison between the predictions of the proposed equivalent continuum approach, the joint element approach, and the solid element approach for a deformation of a test tunnel section containing an ISWZ show that the results produced by the first two approaches are similar, but much smaller than that using the third approach. Further comparison of the actual state of the ISWZ-containing rock mass in the test tunnel section confirmed the applicability of the proposed equivalent continuum approach to prediction of deformation of the rock masses containing ISWZs at the future Baihetan underground powerhouse site. (C) 2014 Elsevier Ltd. All rights reserved.
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000350518700005
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3695]
专题	岩土力学所知识全产出_期刊论文岩土力学所知识全产出国家重点实验室知识产出_期刊论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.Ecole Ponts ParisTech, Lab Navier CERMES
推荐引用方式 GB/T 7714	Jiang, Quan,Xu, Ding-Ping,Feng, Xia-Ting,et al. Use of the equivalent continuum approach to model the behavior of a rock mass containing an interlayer shear weakness zone in an underground cavern excavation[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2015,47:35-51.
APA	Jiang, Quan,Xu, Ding-Ping,Feng, Xia-Ting,&Cui, Yu-Jun.(2015).Use of the equivalent continuum approach to model the behavior of a rock mass containing an interlayer shear weakness zone in an underground cavern excavation.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,47,35-51.
MLA	Jiang, Quan,et al."Use of the equivalent continuum approach to model the behavior of a rock mass containing an interlayer shear weakness zone in an underground cavern excavation".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 47(2015):35-51.