摘要
富水未成岩粉细砂隧道开挖后围岩极不稳定,呈流塑状,极易出现溜塌现象、造成初期支护变形侵限,甚至大的坍塌,严重影响到工程的质量、安全、工期及成本。为确保施工进度、安全及质量,必须采取预加固措施。文章结合兰渝铁路LYS-7标段桃树坪隧道出口段的施工实践,介绍了隧道出口富水未成岩粉细砂地层的高压旋喷注浆预加固技术。
It is necessary to take some measures to ensure construction progress,safety and quality for a tunnel passing through fine sanfstone stratum.This paper introduces the advance reinforcement technique by jet grouting for the tunnel exit embedded in immature fine sandstone stratum with rich water based on the practice of Taoshuping tunnel Lot LYS-7 on Lanzhou-Chongqing railway.
出处
《现代隧道技术》
EI
北大核心
2011年第2期116-119,共4页
Modern Tunnelling Technology
关键词
隧道施工
富水未成岩粉细砂
地层预加固
高压旋喷注浆
水平旋喷桩
Tunnel construction
immature fine sandstone stratum with rich water
Ground advance reinforcement
High-pressure rotary jet grouting
Horizontal rotary jet grouting
