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央视网消息(新闻联播):过去5年,我国建设者攻坚克难、科学施工,在山岭奇峻、地质复杂地区攻克一个个难题,凿出通道,一个个隧道工程在建设者的砥砺奋进下顽强挺进,创造一个又一个国内首创。
在重庆主城与四川盆地间的中梁山里,成渝客运专线列车正在通过新中梁山隧道进入重庆,就在列车呼啸而过的山里,一座高铁隧道组成的铁路立交正在建设。
在国家高速铁路网里,重庆连接着多条国家铁路大动脉。为了让重庆多个方向的高铁互联互通,在山肚子里建立交隧道的大胆设想被提了出来。然而,建单一隧道的技术满足不了建一个隧道群的需求,建设者面对的是一个又一个难题。比如,上下错落的隧道洞中有洞,甚至一洞连几洞,隧道口也从90平米到274平米不等,仅是为了让固定模板台车灵活多变,工程师们研发出了像“变形金刚”似的可变型台车。
在整个中梁山隧道群建设中隧道口大小变化多达18次,“变形金刚”也变身了18次。不同的设计方案、每一项新技术,在建设过程中都成为建设者的一个个创举。
同样靠创新技术完成创举的,还有云南境内成贵铁路玉京山隧道。6月22日,玉京山隧道泄水洞施工通道与巨型暗河溶洞顺利贯通,不仅穿越了煤层,还保护了一个巨大的溶洞。
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