摘要
很多隧道工程所处地质环境复杂,隧道洞口段处于软弱围岩、浅埋、偏压等情况下,岩性条件比较差,通过应用管棚支护施工技术,能够有效提升隧道施工安全性。本文首先对软弱围岩概念和变形特征进行介绍,然后结合工程实例,对软弱围岩隧道长管棚超前支护施工技术要点进行探究。
In many tunnel projects where the geological environment is complex and the tunnel mouth section is in weak rock,shallow buried and biased,the lithology conditions are relatively poor. Through the application of pipe shed support construction technology,the tunnel construction safety can be effectively improved. In this paper,the concept and deformation characteristics of soft surrounding rock are introduced firstly.Then,combining with engineering examples,the key points of construction technology for advanced support of long and thin pipe tunnel in soft surrounding rock are explored.
出处
《四川建材》
2018年第6期108-109,共2页
Sichuan Building Materials
关键词
软弱围岩
超前支护
管棚
钻孔
注浆
weak surrounding rock
advanced support
pipe shed
drilling
grouting
