摘要
公路隧道软岩大变形路段围岩自稳能力差,容易产生变形破坏,甚至出现塌方、冒顶等事故。应结合现场地质情况合理确定支护参数,保证隧道结构安全稳定。文中从变形速度快、变形不均匀和持续时间长等方面研究了隧道软岩大变形段的变形特点和开挖技术,从钢拱架强度、缩脚锚杆、拱脚支垫及螺栓连接等方面分析了隧道支护重点,可在实践中有效控制变形,提高隧道整体结构的稳定性。
The surrounding rock in the soft rock section with large deformation of highway tunnel has poor self stability,easy to deform and damage,and even collapse,roof fall and other accidents.The support parameters shall be reasonably determined in combination with the site geological conditions to ensure the safety and stability of the tunnel structure.In this paper,the deformation characteristics and excavation technology of large deformation section in soft rock of tunnel are studied from the aspects of fast deformation speed,uneven deformation and long duration.The key points of tunnel support are analyzed from the aspects of steel arch strength,retracted anchor bolt,arch foot support pad and bolt connection,which can effectively control the deformation and improve the stability of the overall structure of tunnel in practice.
作者
王丽霞
Wang Lixia(Shanxi Ghenrun Transportation Technology Co.Ltd.,Jinzhong,Shanxi 030600)
出处
《江西建材》
2022年第1期182-183,共2页
Jiangxi Building Materials
关键词
公路隧道
软岩大变形段
开挖
支护
Highway tunnel
Soft rock large deformation section
Excavation
Support
作者简介
王丽霞(1995-),女,山西原平人,大专,工程师,主要研究方向:道路与桥梁。
