10月13日上午9时18分，由中铁上海工程局承建的沈白高铁吉林段TJ-5标长岗隧道正式进洞，施工进入实质性实施阶段。
长岗隧道位于吉林省白山市，是沈白高铁重点控制性节点工程。隧道为单线隧道，全长1320m，隧道最大埋深约91m。全隧道V级围岩330m，IV级围岩550，III级围岩440m，地质结构复杂，施工难度高，安全风险大，工期任务紧，项目部精心组织，严格按照施工组织要求，全力确保隧道进口满足进洞要求。
长岗隧道主要工程内容包括洞口边仰坡、超前大管棚、超前小导管、超前双层小导管、隧道开挖、防排水、支护、仰拱、仰拱填充、二次衬砌、洞门工程等。按新奥法设计与施工，暗挖隧道采用复合式衬砌结构，隧道进出口均采用双耳墙式洞门结构。
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