A large-scale physical model test on frozen status in freeze-sealing pipe roof method for tunnel construction

被引：51
作者：
Hu, Xiangdong [1 ,2 ]
Fang, Tao [1 ,2 ]
Chen, Jin [3 ]
Ren, Hui [4 ]
Guo, Wang [5 ]
机构：
[1] Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China
[2] Tongji Univ, Key Lab Geotech & Underground Engn, Minist Educ, Shanghai 200092, Peoples R China
[3] Mem Univ Newfoundland, Fac Engn & Appl Sci, Dept Civil Engn, St John, NF A1B 3X5, Canada
[4] Management Ctr, Zhuhai Link Rd,Hong Kong Zhuhai Macao Bridge, Zhuhai 519030, Peoples R China
[5] Tianjin Municipal Engn Design & Res Inst, Tianjin 300051, Peoples R China
来源：
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY | 2018年 / 72卷
基金：
中国国家自然科学基金;
关键词：
Gongbei tunnel; Freeze-sealing pipe roof method; Freezing scheme; Freezing effect; A large-scale physical model test;
D O I：
10.1016/j.tust.2017.10.004
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The Gongbei Tunnel, the most important and difficult part in Zhuhai Link of Hong Kong-Zhuhai-Macao Bridge, faces numerous troubles because of natural and human-related factors. A new pre-supporting technique, Freeze Sealing Pipe Roof method, which combines Pipe-Roofing Method with Artificial Ground Freezing method, has been put forward and employed for the first time in China during the construction of the Gongbei Tunnel. An innovative freezing scheme is proposed by three kinds of freezing tubes (master, enhancing and limiting tubes) to cope with various conditions. A large-scale physical model test has been conducted so as to validate the freezing effect of Freeze-Sealing Pipe Roof method. The present paper focuses on the experimental set-up and results in detail, which confirms safety and rationality of the freezing scheme.
引用
收藏
页码：55 / 63
页数：9
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