既有金鸡关隧道拆除改建高深路堑技术  

Technology on Demolishing and Rebuilding High and Deep Cutting of Existing Jinjiguan Tunnel

作　　者：郑雨辰 ZHENG Yuchen(Sichuan No.4 Construction Co.,Ltd.,Chengdu 610001,China)

机构地区：[1]四川省第四建筑有限公司,成都610001

出　　处：《路基工程》2023年第1期212-215,共4页Subgrade Engineering

摘　　要：依托川藏公路既有金鸡关隧道整体挖除、在新建道路两侧形成100 m深度高边坡工程。对爆破拆除和机械拆除两种方案进行比选,在确保安全、不影响工期的前提下,采用机械拆除方案。通过制定科学合理的拆除方案,对隧道周边土石方开挖、拱顶土石方开挖、拱顶及拱墙混凝土拆除、仰拱回填和拆除、土石方回填等进行严格管控,最终顺利完成拆除,对类似工程具有一定参考价值。Relying on the integral demolishing of the existing Jinjiguan Tunnel of Sichuan—Tibet Highway, a wholeand a high slope 100 m deep will be formed on both sides of the new road. The two schemes of blasting demolition and mechanical demolition are compared. On the premise of ensuring safety and not affecting the construction period, the mechanical demolition scheme is carried out. The scientific and reasonable demolition plan is formulated to strictly control the earth rock excavation around the tunnel, the earth rock excavation at the arch crown, the concrete demolition of the arch crown and arch wall, the inverted arch backfilling and demolition,and the earth rock backfilling, and the demolishing works is finally completed smoothly, which has certain reference value for similar projects.

关 键 词：老旧隧道 机械拆除 分区开挖 高陡边坡 土石方回填 

分 类 号：U416.13[交通运输工程—道路与铁道工程]