Groundwater-mud control and safety thickness of curtain grouting for the Junchang Tunnel: A case study

doi:10.1016/j.tust.2020.103429

	Groundwater-mud control and safety thickness of curtain grouting for the Junchang Tunnel: A case study
	Liu, Jin-Quan 1,2,5; Chen, Wei-Zhong 3; Yuen, Ka-Veng 1,5; Zhou, Xiao-Sheng 4
刊名	TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
	2020-09-01
卷号	103 页码:16
关键词	Groundwater control Weathered granite Ground condition Safety thickness Field investigation
ISSN号	0886-7798
DOI	10.1016/j.tust.2020.103429
英文摘要	The Junchang tunnel is a part of a major project in the Censhui highway in Guangxi province, China. The weathered granite part of the tunnel is approximately 180 m long with two lines and four lanes. Numerous water and mud inrush disasters frequently occurred in the weathered granite area, leading to serious economic loss and challenge to the constructors. Therefore, continuous grouting was carried out for the entire weathered part of the tunnel. This paper describes its curtain grouting for disasters prevention. Detailed discussion is presented on the safety thickness after grouting and the challenges encountered under different hydraulic-geological conditions. Specifically, a water and mud inrush model for the nonlinear flow and mass transfer behavior of weathered granite was used to evaluate the safety thickness in this project. Then, field studies with twenty-five grouting cycles and excavations were conducted to investigate the effective safety thickness. Negative correlation was observed between the safety thickness and the rock classification index [BQ]. Numerical simulation and field tests demonstrated that the thickness l should be larger than 3 m, and, in most cases, 5 m was sufficient when [BQ] < 72.5. When [BQ] >= 72.5, l should be between 1.5 m and 3 m. Based on the field data, an empirical formula was developed to determine the thickness under different values of [BQ]. The research findings serve as an important reference for future projects in similar stratum.
资助项目	China National Natural Science Foundation of Youth Fund Project[51809253] ; Science and Technology Development Fund, Macau SAR[SKL-IOTSC-2018-2020] ; Research Committee of University of Macau[MYRG2018-00048-AAO] ; China National Basic Research Program ; 973 Program[2013CB036006] ; Natural Science Foundation of the Fujian Province[2019J01142]
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:000556245300003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24625]
专题	中科院武汉岩土力学所
通讯作者	Yuen, Ka-Veng
作者单位	1.Univ Macau, Dept Civil & Environm Engn, Macau, Peoples R China 2.Chinese Acad Sci, Quanzhou Inst Equipment Mfg, Haixi Inst, Quanzhou 362000, Fujian, Peoples R China 3.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China 4.Guangxi Xinda Highway Co Ltd, Nanning 530021, Guangxi, Peoples R China 5.Univ Macau, State Key Lab Internet Things Smart City, Macau, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jin-Quan,Chen, Wei-Zhong,Yuen, Ka-Veng,et al. Groundwater-mud control and safety thickness of curtain grouting for the Junchang Tunnel: A case study[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2020,103:16.
APA	Liu, Jin-Quan,Chen, Wei-Zhong,Yuen, Ka-Veng,&Zhou, Xiao-Sheng.(2020).Groundwater-mud control and safety thickness of curtain grouting for the Junchang Tunnel: A case study.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,103,16.
MLA	Liu, Jin-Quan,et al."Groundwater-mud control and safety thickness of curtain grouting for the Junchang Tunnel: A case study".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 103(2020):16.