新建西宁至成都铁路若尔盖隧道贯通|国产精品久久久久久喷浆

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  中新网成都8月8日电 (记者 刘忠俊)8月8日,新建西宁至成都铁路若尔盖隧道顺利贯通,标志着全线隧道施工进入攻坚阶段。

隧道贯通后挖掘机正在清理渣土。成兰铁路公司供图

  西宁至成都铁路是我国“八纵八横”高铁网兰(西)广通道的重要组成部分,起自青海西宁,经青海、甘肃、四川三省,终至四川成都。其中四川段长约170公里,多数路段海拔3500米左右,从川青铁路黄胜关站引出,途经红原、若尔盖等站进入甘肃。

  若尔盖隧道位于四川阿坝州若尔盖县,为单洞双线隧道,全长2176.92米,设计时速200公里。隧道由中铁七局集团承建,地处青藏高原东北边缘,地质条件复杂,属高地应力软岩变形隧道,围岩破碎,洞身下穿3处构造破碎带,地下水丰富,涌泥突水风险高。同时,加上隧道平均海拔3493米,全年平均气温不足5℃,12月至次年1月最低气温达-23℃。高原缺氧导致机械设备能效低、物资运输困难;且隧道穿越若尔盖高原和喀哈尔乔湿地自然保护区,环保要求高,加之地处“无人区”,施工难度极大。

隧道贯通后参建者们合影留念。成兰铁路公司供图

  隧道开工以来,施工方采用地质雷达等超前预报围岩情况,通过自动监测调整支护措施,遵循“管超前、严注浆”等施工原则,实现“动态设计、动态施工”,并运用现代化机械设备减少人工劳动强度。成兰铁路有限责任公司西宁至成都铁路指挥部指挥长印建文表示,目前西宁至成都铁路四川段隧道工程已完成66.2%,贯通5座;桥梁工程完成77.5%;路基工程完成58.8%,各项工作正有序推进。

  据悉,西宁至成都铁路四川段由蜀道投资集团参与投资建设,全线建成通车后将极大便利沿线群众出行,促进沿线经济社会发展。(完)

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