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全断面硬岩地层盾构隧道管片上浮控制技术研究
收稿日期: 2014-11-17
修回日期: 2014-12-24
网络出版日期: 2015-02-11
基金资助
国家国际科技合作专项(2011DFB71550); 中铁隧道集团科技创新计划(隧研合2012-17)
Control Technologies for Upfloating of Segment Rings of Shieldbored Tunnel in Fullface Hardrock Ground
Received date: 2014-11-17
Revised date: 2014-12-24
Online published: 2015-02-11
杨延栋 , 陈馈 , 李凤远 , 周建军 . 全断面硬岩地层盾构隧道管片上浮控制技术研究[J]. 隧道建设, 2015 , 35(2) : 180 -184 . DOI: 10.3973/j.issn.1672-741X.2015.02.013
In this paper, the causes and mechanisms of the upfloating of the segment rings of a shieldbored tunnel on No. 7 Line of Guangzhou Metro, which is located in fullface hardrock ground, are analyzed in terms of mechanical conditions and space conditions, so as to ensure the quality of the segment lining. Countermeasures, including pea gravel backfilling behind the segment rings, prevention of gout loss by means of grout stopping rings and waterstopping rings, improving the backfilling effect of the simultaneous grouting by adopting semiopen boring mode, and installing cylinders at the bottom of the front shield to avoid shield pitching, are proposed.
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