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长城下方将建京张高铁八达岭站 为世界“最深”车站

2016-09-29 06:16:34   北京青年报

据悉,车站的每个出入口都将安装扶梯,垂直高度达62米,这也是目前国内旅客提升高度最大的高速铁路地下车站。车站还设计了救援廊道,“围绕车站,有一圈救援通道,通过各个分通道与车站相连,任何一个位置都可以进入车站,形成一个无死角的救援设计”。

摄影/本报记者 郝羿

释疑

  高铁隧道下穿长城如何做到不破坏文物?

八达岭隧道长达12.01公里,穿越八达岭长城核心区,国宝级文物众多,沿线还分布有居庸关长城、水关长城等国家级旅游景点。隧道一处并行水关长城,两次下穿八达岭长城,其中一处下穿石佛寺村,最小埋深10米,另一处下穿老京张铁路青龙桥车站,最小埋深只有4米。下穿长城并非易事。八达岭隧道要穿越两条地质断层带,存在岩爆、湿陷性黄土、软岩大变形等高风险地质,均为施工极高风险等级,稍有不慎,就会引起坍塌。同时,沿线环境保护、文物保护要求非常严格,要求做到施工地表零沉降。如何做到“高铁隧道与环境共生”?

中铁五局京张铁路项目总工程师罗都颢介绍,在八达岭长城脚下,他们采用的是“精准微爆破”技术,传统爆破技术震速有5厘米/秒,震感比较强,爆破的时候车窗玻璃都会有所振动,新技术的震速只有0.2厘米/秒,只相当于一辆汽车经过,对文物不会产生破坏。而在埋深只有4米的青龙桥车站,隧道采用“非爆破开挖”,大约有40米的隧道挖掘要完全靠人工和机械推进,以此来保护文物。

文/本报记者 董鑫

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