9月25日，中国中铁旗下中铁北京局承建的西安至重庆高速铁路（西渝高铁）冉家坡隧道顺利贯通。 冉家坡隧道地处四川省达州市宣汉县三河乡，全长4454米，单洞双线。该隧道穿越两处V型沟浅埋段，最小埋深1.6米，围岩以泥岩、砂岩互层为主且节理裂隙较发育，施工中易发生掉块、坍塌，并且夏季洞内作业温度高达40度，整体施工的安全风险及技术难度较大。 建设过程中，项目团队严格遵循“弱爆破、短进尺、强支护、早...
Source Link9月25日，中国中铁旗下中铁北京局承建的西安至重庆高速铁路（西渝高铁）冉家坡隧道顺利贯通。 冉家坡隧道地处四川省达州市宣汉县三河乡，全长4454米，单洞双线。该隧道穿越两处V型沟浅埋段，最小埋深1.6米，围岩以泥岩、砂岩互层为主且节理裂隙较发育，施工中易发生掉块、坍塌，并且夏季洞内作业温度高达40度，整体施工的安全风险及技术难度较大。 建设过程中，项目团队严格遵循“弱爆破、短进尺、强支护、早...
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