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兰渝铁路今日全线贯通 横跨甘陕川渝

2017-06-20 09:32:35   央广网

央广网北京6月20日消息(记者孟永辉王妍)据中国之声《新闻和报纸摘要》报道,昨天上午,随着全线卡脖子工程胡麻岭隧道贯通,连接我国西南和西北最便捷的铁路大通道——兰渝铁路全线贯通

胡麻岭隧道是连接我国西北和西南最便捷快速的大能力运输通道——兰渝高速路上的“头号重难点工程”。2011年8月,离贯通仅剩173米时,施工遇到了“第三系富水粉细砂”地层。

中铁第一勘察设计院院长刘为民:胡麻岭隧道地层的水稳特性非常复杂,在施工的过程中,不断出现突水、流沙等现象。

在这样的地层做隧道开凿就好比在“在豆腐脑里打洞”。过去5年半,胡麻岭隧道发生了四次大突涌,清理砂浆15万立方米,2015年,建设者研发出组合式的真空降水技术,使开凿速度大大加快。

胡麻岭隧道的正式贯通,意味着兰渝铁路将于今年年内全线开通运营,服务甘陕川渝三省一市的22个县区。建成通车后,重庆直达兰州全程运行距离比现在可缩短近700公里,节省运行时间约11个小时。

责任编辑:杨晓晨 CN067
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6年攻坚173米 “世界难题”兰渝铁路胡麻岭隧道贯通

2017-06-19 17:01:17

兰渝铁路“头号重难点”工程胡麻岭隧道贯通

2017-06-19 17:02:59
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