特长公路隧道全断面钻爆大型机械化施工技术

Large-scale Mechanized Construction Technology of Extra-long Highway Tunnel with Full-section Drilling and Blasting

特长大断面公路隧道施工是整个高速公路线路施工工期的关键,为了保证施工质量、加快施工进度,依托首都环线高速公路G95承平段杨家窝铺特长大断面公路隧道工程,提出了“地质条件适应、环境污染低、性能匹配、功能可靠、技术先进、成本可控、通用性强”的大型机械化设备配套原则,分析了钻眼爆破、初期支护、仰拱施工及二次衬砌施工过程中所用机械设备的性能与效能,采用钻爆大型机械化施工技术后,杨家窝铺隧道的施工进度较计划进度提前1个月。

The construction of an extra-long and large cross-section highway tunnel is the key for entire construction period in expressway.To ensure construction quality and improve construction progress,the principles for supporting large-scale mechanized equipment,such as matching with geological conditions,low environmental pollution,performance matching,reliable function,advanced technology,controllable cost,and strong universality,were proposed based on Yangjiawopu Tunnel project of G95 Chengde-Pinggu section of capital ring expressway.The performance and efficiency of mechanical equipment used in drilling and blasting,initial support,inverted arch construction,and secondary lining construction were analyzed.The construction progress of Yangjiawopu Tunnel is one month ahead of schedule after adopting the large-scale mechanized construction technology with drilling and blasting.