云南水力发电2024，Vol.40Issue(10)：101-106,6.DOI:10.3969/j.issn.1006-3951.2024.10.022
流砂地层大管径顶管施工技术
Construction Technology for Large-diameter Pipe Jacking in Quicksand Formations
石正鹏 1成林1
作者信息
- 1. 中国水利水电第十四工程局有限公司,云南 昆明 650041
- 折叠
摘要
Abstract
In Xiaohai River Water Connection Project in Dongguan City,the top pipe method is used to cross a certain water supply channel,with a diameter of DN1 500 reinforced concrete Grade Ⅲ pipe.The pipe jacking passes through a medium coarse sand layer with a permeability coefficient(cm/s)of 1.113E-03,which is analyzed to be moderately permeable.The groundwater level is 4.8 m and relatively high.The net distance between the foundation piles of a certain water supply channel is 9.8 m,the pile length is 13.6 m,and it is located in the middle of the top pipe section.Due to the strong permeability of the medium coarse sand layer,it is easy for sand to flow and cause surrounding collapse during the jacking process.And the net spacing between the pile foundations of a certain water supply channel is 9.8 m.The main construction difficulty of this project lies in the pipe jacking section.关键词
顶管/流砂地质/透水性/超前注浆Key words
top pipe/flowing sand geology/permeability/advanced grouting分类
建筑与水利引用本文复制引用
石正鹏,成林..流砂地层大管径顶管施工技术[J].云南水力发电,2024,40(10):101-106,6.
