在建世界最长单坡高速隧道顺利进洞施工|欧美又粗又大XXXXBBBB疯狂
11月29日,攀枝花至盐源高速公路(以下简称“攀盐高速”)控制性工程——同德隧道进口端顺利进洞施工,这一在建世界最长单坡高速公路隧道项目取得重大进展。
同德隧道位于攀枝花市盐边县惠民镇,为分离式特长隧道,左线长14450米,右线长14520米,隧道最大纵坡达1.7%,累计爬升高度约244米,是在建世界最长单坡高速公路隧道。隧道洞身需穿越断层破碎带及高埋深地段,施工面临岩爆、高地热、突涌水等不良地质挑战。
针对洞口浅埋、围岩松软等不良地质情况,团队引入“GNSS监测系统”(又名全球导航卫星系统)实施地表沉降实时监测。通过将专用探头精准埋设于监测点,并由基站接收信号,系统可实现24小时不间断数据自动记录与留存。一旦数据异常,系统会及时预警,为施工安全与工程质量提供精准、可靠的技术支撑,最终实现了同德隧道的顺利进洞。
攀盐高速公路项目全长约131.3公里,双向四车道,设计时速80公里,桥隧比高达80%,全线共设桥梁67座、隧道20座、互通式立交10处,其中超过10公里的超级隧道2座,千米级桥梁1座,预计建设工期6年。项目于今年9月28日正式进入实质性建设阶段,目前已陆续实现格萨拉隧道、二台坡隧道、半边街金沙江特大桥、岔丘河大桥等7处重难点工程的前期关键节点施工。
攀盐高速公路是《四川省高速公路网布局规划(2022—2035年)》13条纵线之一,是班玛经色达至攀枝花高速公路的重要组成路段,也是G4216丽江至攀枝花、G7611西昌至香格里拉两条国家高速的重要联络线。
该项目建成后,攀枝花市区到盐源县的车程将由原来的5小时缩短至约2小时,直接辐射人口超400万。未来,攀盐高速将成为连接攀西经济区与川西北生态示范区的关键纽带,实现与西香高速、蓉丽高速、攀大高速、G5京昆高速四条区域交通动脉的有机衔接。
华西都市报-封面新闻记者 曹菲
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