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National First Long Tunnel on Mountainous Two-to-Four-Lane Highway Expansion Opens to Traffic in Longyan

2019-01-24 827 0人评论

　　1月23日，全国首条山区二扩四高速公路长隧道——厦蓉高速公路后祠隧道通车。该工程于今年1月初全面完工，1月23日与厦蓉高速改扩建工程适中至红坊段一同通车。

　　后祠隧道位于新罗区适中镇，是龙岩厦蓉高速改扩建控制性工程。工程在原漳龙高速公路后祠隧道右线原位上由二车道扩建为四车道，宽度由9米扩至20米，扩建后净空17.75×5m（宽×高）。隧道长1002米，属于中长大跨度隧道，也是省内里程最长、地质条件最复杂、施工难度最大的首条二扩四长隧道。

　　该工程是厦蓉高速改扩建龙岩段一重点和难点工程。自开工以来，从勘测设计、方案评审、施工组织到隧道贯通，克服了原隧道二衬背后不密实、空洞、围岩异常松动、拱顶松散体滑落、开挖断面大等不利影响，仅用300多天完工。

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National First Long Tunnel on Mountainous Two-to-Four-Lane Highway Expansion Opens to Traffic in Longyan

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National First Long Tunnel on Mountainous Two-to-Four-Lane Highway Expansion Opens to Traffic in Longyan

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