带综合管廊双连拱隧道超厚仰拱非对称分幅施工技术探讨

Discussion on Construction Technology of Unsymmetrical Farming of Super Thick Inverted Arch of Double Arch Tunnel with Comprehensive Pipe Gallery

景德镇市凤凰山隧道施工时,综合考虑围岩状况、工期、工艺等因素,采用仰拱及超厚仰拱填充非对称分幅施工,左、右幅交替推进,利用左、右幅中间的幅差作为施工便道,满足仰拱及仰拱填充混凝土养护期间隧道施工的车辆通行要求,在保证质量的前提下,加快隧道施工进度。文章中结合笔者工作经验,对上述施工技术进行探讨。

During construction of Fenghuangshan tunnel in Jingdezhen city,considering surrounding rock condition,construction period,technology and other factors,inverted arch and super thick inverted arch are used to fill unsymmetrical framing construction,and left and right spans are alternately pushed forward.The gap between left and right spans is used as construction access to meet traffic requirements of tunnel construction during maintenance period of inverted arch and inverted arch filled concrete,and on premise of ensuring quality,speed up tunnel construction progress.In this paper,above construction technology is discussed combined with author's work experience.