Performance of New Type of Foamed Concrete in Supporting Tunnel in Squeezing Rock

doi:10.1061/(ASCE)GM.1943-5622.0001543

	Performance of New Type of Foamed Concrete in Supporting Tunnel in Squeezing Rock
	Wu, Guojun 3; Chen, Weizhong 2,3; Tan, Xianjun 3; Zhao, Wusheng 3; Jia, Shanpo 1; Tian, Hongming 3; Yang, Jianping 3
刊名	INTERNATIONAL JOURNAL OF GEOMECHANICS
	2020-02-01
卷号	20 期号:2 页码:12
关键词	Foamed concrete Cushion material Support Reserved deformation Tunnel
ISSN号	1532-3641
DOI	10.1061/(ASCE)GM.1943-5622.0001543
英文摘要	For tunneling in squeezing rock, large deformation induced by tunnel excavation and creep of squeezing rock has been a great challenge during construction. This large deformation would keep growing for a long time, significantly threatening the stability of the tunnel. In this study, a new foamed concrete is introduced. Relative to conventional foamed concrete, the new foamed concrete has the characteristics of good ductility (it maintains its integrity and is not easy to crack), high compressive strength (the uniaxial compressive strength is 3.12 MPa, whereas for the conventional concrete it is about 0.9 MPa), and tight adhesion with cement concrete (proven by shear strength at interface between the foamed concrete and the cement concrete) as shown by laboratory tests. To evaluate its performance as a cushion material in the yielding support for a tunnel, the foamed concrete was applied in a yielding support for a deep-buried tunnel in squeezing rock by numerical simulation. Compared with the results of the stiff support, the contact and shear stress at the interface between the cushion layer and the second lining are very small, resulting from the capacity of the foamed concrete to endure great loads and absorb energies from the creep of surrounding rock, thereby improving the stress state of the second lining and reducing the deformation of the second lining.
资助项目	National Basic Research Program of China (973 Program)[2015CB057906] ; Hubei Provincial Natural Science Foundation of China[2018CFA012] ; Youth Innovation Promotion Association, CAS
WOS研究方向	Engineering
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000502794700003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23286]
专题	中科院武汉岩土力学所
通讯作者	Wu, Guojun
作者单位	1.Yangtze Univ, Res Ctr Geomech & Geotech Engn, Jingzhou 434023, Hubei, Peoples R China 2.Shandong Univ, Res Ctr Geotech & Struct Engn, Jinan 250061, Shandong, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Wu, Guojun,Chen, Weizhong,Tan, Xianjun,et al. Performance of New Type of Foamed Concrete in Supporting Tunnel in Squeezing Rock[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2020,20(2):12.
APA	Wu, Guojun.,Chen, Weizhong.,Tan, Xianjun.,Zhao, Wusheng.,Jia, Shanpo.,...&Yang, Jianping.(2020).Performance of New Type of Foamed Concrete in Supporting Tunnel in Squeezing Rock.INTERNATIONAL JOURNAL OF GEOMECHANICS,20(2),12.
MLA	Wu, Guojun,et al."Performance of New Type of Foamed Concrete in Supporting Tunnel in Squeezing Rock".INTERNATIONAL JOURNAL OF GEOMECHANICS 20.2(2020):12.