厦门海沧海底隧道穿越风化槽施工技术  

Construction Technology of Xiamen Haicang Subsea Tunnel Crossing Weathered Trough

作　　者：董建松 DONG Jiansong(Fujian Transport Construction Quality and Safety Center,Fuzhou 350001)

机构地区：[1]福建省交通建设质量安全中心,福州350001

出　　处：《现代隧道技术》2021年第6期197-203,共7页Modern Tunnelling Technology

摘　　要：海底风化槽属于不良地质体,围岩破碎,自稳能力差。厦门第二西通道(海沧隧道)海域段左线穿越国内最长风化槽段,风化槽全长160 m。海底隧道穿越风化槽段施工难度高、风险大,一旦发生突涌水事故,将造成灾难性的后果。文章以海沧隧道为工程背景,详细研究穿越风化槽关键施工技术,阐述了综合超前地质预报体系、超前支护、超前注浆堵水、注浆效果检验方案和CD法开挖工序。施工过程中加强隧道位移变形的监控量测和分析,确保了风化槽段施工安全。The weathered trough in seabed is a bad geological body with broken rock and poor self-stability.The left tube of the sea-crossing section of Xiamen second west passage(Haicang tunnel)passes through the longest weathered trough in China,with a total length of 160 m.The construction of subsea tunnel passing through weathered trough is difficult and risky.Once water inrush occurs,it will lead to disastrous consequences.In view of this,key construction technologies for tunnel passing the weathered trough are studied in detail based on engineering background of Haicang Tunnel.Specific schemes and methods,such as comprehensive advance geological prediction system,advance support,advance grouting for water blockage,grouting effect test and construction procedures of CD excavation method,are summarized as well;meanwhile,the tunnel displacement and deformation are densely monitored,measured and analyzed in the process of construction,ensuring the safe construction in weathered trough section.

关 键 词：海底隧道 风化槽 施工技术 隧道位移 监控量测 

分 类 号：U452.49[建筑科学—桥梁与隧道工程]