谈高速公路隧道改扩建设计施工要点

Brief probe into design and construction in tunnel reconstruction and expansion of expressway

目前国内高速公路路网已基本完成,后续项目逐渐减少。而早期修建的高速公路因经济发展等原因,车流量不断增加。原先修建的双向四车道隧道已不满足需求,隧道的提速扩容迫在眉睫,归纳总结国内已建成改扩建项目的特点,简要概括了山区高速公路隧道改扩建设计过程中相关要点,以供相似工程借鉴。

Until now,the domestic expressway network has been basically completed,and the follow-up projects are gradually reduced.Because of the economic development and some other reasons,the traffic volume of the expressway built in the early stage is increasing.So the original two-way four-lane tunnel has not met the demand,the speed-up and expansion of the tunnel is imminent.This paper summarizes the characteristics of the domestic completed reconstruction and expansion projects,and briefly summarizes the relevant points in the design process of the reconstruction and expansion of mountain expressway tunnel,so as to provide reference for similar projects.