四川宜攀高速谢家湾特长瓦斯隧道双幅贯通|久久久久免费毛A片免费一瓶梅
中新网成都9月28日电 (记者 刘忠俊)9月27日,四川宜宾至攀枝花高速公路屏山新市至金阳段(以下简称“宜攀高速新金段”)控制性工程——谢家湾特长瓦斯隧道实现双幅贯通。这标志着宜攀高速新金段宜宾境内隧道群全线贯通,为2026年该路段建成奠定坚实基础。

谢家湾隧道位于四川省宜宾市屏山县清平乡,为双线分离式—小净距低瓦斯隧道,全长4295米、最大埋深712米、最大纵坡1.65%,是宜攀高速宜宾境内最长隧道。因需穿越煤系地层、岩溶发育带等不良地质段,且洞口多位于深沟峡谷、材料运输困难,施工难度极大。
面对挑战,项目团队在瓦斯防控上,应用“不动火”工艺实现掌子面“零火源”;地质预判中,以“物探+钻探”超前探测掌握实时地质情况;施工中遵循“短进尺、弱爆破、强支护、快封闭”原则,引入智能设备并通过监控系统实时监测瓦斯浓度、围岩应力等数据,实现“信息化管控、可视化施工”。
宜攀高速新金段桥隧比达92%、隧道比71%,其中宜宾境内隧道比79%,含12座隧道(3座特长隧道、6座瓦斯隧道)。目前,该路段正推进西宁河特大桥、卡哈洛金沙江特大桥等重点工程,计划2025年底完成绥江支线5公里通车及庙子湾隧道至谢家湾隧道12.7公里路段建设。
宜攀高速全长446.36公里(主线426.93公里、支线19.43公里),按双向四车道标准建设,设计时速80公里,接已建成的G4216线攀丽段,分屏山新市至金阳、金阳至宁南、宁南至攀枝花三段建设。全线通车后,凉山州雷波县、金阳县、布拖县三县将结束不通高速历史。(完)
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