超大断面软岩隧道施工新技术

New construction technology of super section tunnel around soft rock

依托贵昆铁路乌蒙山二号隧道四线车站段的修建,对超大断面软岩隧道修建技术进行了专项研究,攻克了一系列关键技术,为双线铁路在设站困难的西部山区修建四线隧道取得了第一手宝贵的资料,助推我国的交通事业向前发展。文章介绍施工过程中采用的复合双侧壁撑索转换工法、三台阶以索代撑工法、撑索转换技术、以索代撑技术、索拱联合支护技术、信息化施工等新技术,以期对同类隧道的施工提供借鉴和参考。

Research on the construction technology of super section tunnel around soft rock were conducted based on the background of the construction for four lines station of WuMengShan no. 2 tunnel in the 6uikun railway. This study can provide reference for station construction in western mountainous area. The technology of compound double side wall line with conversion from support to cable method, conversion technology from support to cable, Cable are combined supporting technology were introduced respectively. The monitoring measurement results were illustrated to prove the feasibility of the technotogy.