连拱隧道施工工艺

双连拱隧道在结构上与单拱隧道有较大区别，近年来逐渐被应用于高等级公路中。如何在其施工过程中把握要点，吸取经验教训，逐渐熟悉并掌握其施工工艺有着非常重要的意义。通过介绍元磨及思小高速公路隧道施工过程中的工艺控制，就双连拱隧道的结构特点、中导洞及三导洞开挖方法、衬砌施工、特殊问题的处理等内容，提出了看法及建议。

Construction Technology of Double-arched Tunnels

Double-arched tunnels, which have been adopted in highway works in recent years, have great difference from single-arched tunnels in respect of tunnel structures. Therefore, it is of great significance to understand the key points of double-arched tunnels and to learn from relevant experience and lessons so as to grasp the construction technology of double-arched tunnels. Taking the double-arched tunnels on Yuan-Mo highway and Si-Xiao highway as example, the article expatiates on the structural features, central drift excavation method, three-drift excavation method, lining construction and some special issues of double-arched tunnels.