铁道标准设计2017，Vol.61Issue(12)：101-104,119,5.DOI:10.13238/j.issn.1004-2954.2017.12.021
砂卵石地层超长管棚技术应用与研究
Application and Research of Over-length Pipe Shed in Grit Gravel Stratum
时亚昕1
作者信息
- 1. 成都轨道交通集团有限公司,成都610031
- 折叠
摘要
Abstract
The application of shed-pipe support for receiving and starting of shield in Chengdu metro shows that shed-pipe support technology is effective in controlling the stratum settlement and ensuring the receiving and starting of shield safe.In order to apply the over-length shed-pipe support technology to the high risk projects such as tunneling under existing metro,this paper studies the diameter,drill depth,construction technology,operating precision of pipe shed and the stratum settlement caused by pipe shed construction based on the pipe shed experiment in the foundation fit of an under-construction metro station in Chengdu.The results show that long-distance pipe jacking can be achieved in Chengdu grit gravel stratum with large-diameter cobble (maximum aggregate size can reach 60 centimeters) and high cobble content (from 60 percent to 80percent) by using in-the-hole drill with impact hammer.When the construction length of pipe roof is shorter than 35 meters,the maximum offset can be 60 centimeters and the stratum settlement is controlled by using pipe-following drilling technology.关键词
管棚支护/砂卵石/潜孔锤/跟管钻进/导向墙Key words
Shed-pipe support/Grit gravel/Down-the-hole hammer/Pipe-following drilling/Guide wall分类
交通工程引用本文复制引用
时亚昕..砂卵石地层超长管棚技术应用与研究[J].铁道标准设计,2017,61(12):101-104,119,5.
