四川西昌至宁南高速首条特长隧道双幅贯通|欧美人妻精品一区二区三区

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  中新网成都9月17日电 (记者 刘忠俊)9月17日,四川西昌至宁南高速公路(以下简称“西宁高速”)公德房隧道双幅贯通,这是该高速全线首条贯通的特长隧道,为项目力争2027年建成通车奠定基础。

山谷中的四川西宁高速公德房隧道。蜀道集团供图

  据了解,公德房隧道连接凉山州普格县黎安乡沙里村与宁南县新建乡上游村,左线长3168米、右线长3205米,最大埋深约345米,属特长微瓦斯隧道。施工中,隧道需穿越则木河、小江两条活动断裂带,全隧为Ⅳ、Ⅴ级围岩(围岩等级Ⅰ至Ⅵ级,数字越大稳定性越差),且实际日涌水量达2.4万立方米(可装满55个标准室内泳池),远超设计预估,出口端还面临泥石流及断裂带活动风险,施工与安全压力大。

  针对复杂地质,项目团队以“机械化换人、智能化减人”推进施工,引入智能凿岩台车、智能拱架一体化台车等设备,应用光面爆破工艺,并通过数字化手段实现门禁、人员定位、有毒有害气体检测、实时视频监控、应急电话广播“五网合一”,提升施工效率与质量。

  此外,为解决施工废水外排难、成本高问题,团队采用“清污分流”工艺,不仅减少15%作业人员、缩短20%钻爆工时,还降低污水处理负荷与运维成本,防止污染物入河入土壤,实现绿色施工与高效建设兼顾。

  作为四川高速公路网纵线S71乐山至昆明高速的重要部分,西宁高速起于西昌市大兴乡(接规划待建的G7611西昌至香格里拉高速西昌支线),止于凉山州宁南县宁远镇,全长105.017公里,采用双向四车道标准建设:起点至普格县城段设计时速80公里,普格县城至终点段100公里。主线设桥梁91座、隧道17座(含特长隧道6座),桥隧比达72.94%。

  据悉,该项目建成后,西昌至宁南车程将从2个半小时缩至约1小时,普格县将结束不通高速历史,同时该高速还将与沿江、西香等高速形成综合交通枢纽,完善区域交通网络。(完)

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