Semianalytical Analysis of Overexcavation and Critical Support Pressure for Support Design in TBM Tunneling through Squeezing Rock Condition

doi:10.1061/(ASCE)GM.1943-5622.0002038

	Semianalytical Analysis of Overexcavation and Critical Support Pressure for Support Design in TBM Tunneling through Squeezing Rock Condition
	Cui, Lan 1,2; Sheng, Qian 1,2; Dong, You-Kou 3; Xie, Ming-Xing 4; Huang, Jue-Hao 1,2,5,6
刊名	INTERNATIONAL JOURNAL OF GEOMECHANICS
	2021-07-01
卷号	21 期号:7 页码:18
关键词	Tunneling Squeezing condition Overexcavation Critical support pressure
ISSN号	1532-3641
DOI	10.1061/(ASCE)GM.1943-5622.0002038
英文摘要	Support damage is a typical hazard scenario associated with tunnel boring machine (TBM) drives in the squeezing rock condition. The stress release of the rock mass and the improvement of the support capacity are two effective methods to prevent support damage. The stress in the rock mass can be released by allowing a certain amount of overexcavation. The support capacity can be evaluated by solving the required support pressures corresponding to different critical strain levels. This paper aims to achieve a better understanding of preventing support damage for TBMs in the squeezing condition by quantitatively analyzing the overexcavation and the required support pressure. A semianalytical solution of the ground reaction curve is obtained. A simplified method of solving the support pressure with specific rock displacement is proposed. Based on the two solutions, the procedures for solving for the overexcavation and the critical support pressure are presented. Corresponding to the critical strain levels of 1%, 2.5%, 5%, and 10%, the response surfaces for critical support pressures in relation to the Geological Survey Index (GSI) and in situ stress are obtained via the nonlinear regression method. The influences of GSI, in situ stress, and the mechanical parameters of the concrete lining and shield on the size of the overexcavation are comprehensively investigated. A method to guide support design in the squeezing rock mass is proposed. Three tunnel cases are presented to demonstrate the application of the method, and three case histories that encounter support failures are discussed to illustrate the appropriate design measures through the proposed method.
资助项目	National Natural Science Foundation of China[52009129] ; National Natural Science Foundation of China[51909248] ; National Natural Science Foundation of China[51909259] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering[201704] ; Open Research Fund of State Key Laboratory of Coastal and Offshore Engineering[LP2012]
WOS研究方向	Engineering
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000657451200005
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27417]
专题	中科院武汉岩土力学所
通讯作者	Sheng, Qian
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.China Univ Geosci, Coll Marine Sci & Technol, Wuhan 430074, Peoples R China 4.Taiyuan Univ Technol, Coll Civil Engn, Taiyuan 030024, Peoples R China 5.Chinese Acad Sci, Inst Rock & Soil Mech, Hubei Key Lab Geoenvironm Engn, Wuhan 430071, Peoples R China 6.Ningbo Univ Technol, Soft Soil Res Ctr, State Key Lab Geome Chan & Geotech Engn, Ningbo 315211, Peoples R China
推荐引用方式 GB/T 7714	Cui, Lan,Sheng, Qian,Dong, You-Kou,et al. Semianalytical Analysis of Overexcavation and Critical Support Pressure for Support Design in TBM Tunneling through Squeezing Rock Condition[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2021,21(7):18.
APA	Cui, Lan,Sheng, Qian,Dong, You-Kou,Xie, Ming-Xing,&Huang, Jue-Hao.(2021).Semianalytical Analysis of Overexcavation and Critical Support Pressure for Support Design in TBM Tunneling through Squeezing Rock Condition.INTERNATIONAL JOURNAL OF GEOMECHANICS,21(7),18.
MLA	Cui, Lan,et al."Semianalytical Analysis of Overexcavation and Critical Support Pressure for Support Design in TBM Tunneling through Squeezing Rock Condition".INTERNATIONAL JOURNAL OF GEOMECHANICS 21.7(2021):18.