Failure Performance of 3DP Physical Twin-Tunnel Model and Corresponding Safety Factor Evaluation

doi:10.1007/s00603-020-02244-7

	Failure Performance of 3DP Physical Twin-Tunnel Model and Corresponding Safety Factor Evaluation
	Jiang, Quan 2; Liu, Xiaopei 1,2; Yan, Fei 2; Yang, Yao 1,2; Xu, Dingping 2; Feng, Guangliang 2
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2020-09-22
页码	20
关键词	Twin tunnels Safety degree Physical model test 3D print Instability criterion
ISSN号	0723-2632
DOI	10.1007/s00603-020-02244-7
英文摘要	Quantitative stability evaluation of multi-tunnel structure is an important issue related to the safety assessment and stable construction of geotechnical underground tunnels. In this work, the overall failure process of twin tunnels were exhibited by a physical simulation based on the 3D printing (3DP) sandstone analogues model, and a safety factor method was also presented for evaluating the general safety of multi-tunnel structure. For checking the 3DP material performance of physical model, uniaxial and triaxial compressions for the 3DP cylinder specimens were first tested and showed that their mechanical properties and failure characteristics were similar to natural rock in general. Then, the overloading tests for twin-tunnel model were carried out and have exposed the critical position of overall failure of twin-tunnel structure through visual observation and automatic measurement. Testing results and corresponding numerical back analysis indicated that the connectivity of plastic strain between tunnels can be deemed as the conservative instability criterion (i.e. yielding of material) and the inflection point of tunnels' displacement can be deemed as overall failure criterion (i.e. structure failure) for twin-tunnel structure. The safety analysis for underground hydraulic caverns indicated that this method can provide a reference for quantitative and reasonable evaluation of the general safety of multi-tunnels or caverns and the local instability zone of surrounding rock.
资助项目	National Natural Science Foundation of China[U1965205] ; National Natural Science Foundation of China[51779251] ; Hubei Province Outstanding Youth Fund[2017CFA060]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000572007400001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24849]
专题	中科院武汉岩土力学所
通讯作者	Yan, Fei
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Quan,Liu, Xiaopei,Yan, Fei,et al. Failure Performance of 3DP Physical Twin-Tunnel Model and Corresponding Safety Factor Evaluation[J]. ROCK MECHANICS AND ROCK ENGINEERING,2020:20.
APA	Jiang, Quan,Liu, Xiaopei,Yan, Fei,Yang, Yao,Xu, Dingping,&Feng, Guangliang.(2020).Failure Performance of 3DP Physical Twin-Tunnel Model and Corresponding Safety Factor Evaluation.ROCK MECHANICS AND ROCK ENGINEERING,20.
MLA	Jiang, Quan,et al."Failure Performance of 3DP Physical Twin-Tunnel Model and Corresponding Safety Factor Evaluation".ROCK MECHANICS AND ROCK ENGINEERING (2020):20.