广东水利水电Issue(4)：74-79,96,7.
软岩大断面隧洞开挖支护施工技术
Construction Technology for Excavation and Support of Large Section Tunnel in Soft Rock
王松茂1
作者信息
- 1. 广东水电二局集团有限公司,广州 511340
- 折叠
摘要
Abstract
The Hejiang Branch Tunnel of the Guangdong Water Resources Allocation Project in the Beibu Gulf is a soft rock large cross-section tunnel with low rock stability and high risk of excavation collapse.The design requires synchronous excavation and secondary lining,making construction difficult.This paper discusses the combined construction method of two step excavation+inverted arch excavation,circular excavation with reserved core soil method+inverted arch excavation for excavation of Class IV and Class V surrounding rocks,as well as the construction method and technical measures for rapid advance small conduit support,steel arch and anchor spray joint support.During the construction process,the deformation of the surrounding rock is stable and controllable,and the tunnel construction is safely and smoothly completed,which can provide reference for similar engineering construction.关键词
软弱围岩/大断面隧洞/台阶法开挖/环形开挖预留核心土法/仰拱开挖/联合支护Key words
weak surrounding rock/large cross-section tunnel/bench excavation method/ring excavation with reserved core soil method/inverted arch excavation/joint support分类
建筑与水利引用本文复制引用
王松茂..软岩大断面隧洞开挖支护施工技术[J].广东水利水电,2025,(4):74-79,96,7.
