四川宜攀高速宁攀段全线贯通 预计年底通车|激情欧美日韩一区二区

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  中新网成都10月22日电 (记者 王鹏)记者22日从蜀道集团获悉,四川宜宾至攀枝花高速公路(简称宜攀高速)宁攀段当日全线贯通,预计2025年年底通车。

图为建设中的宜攀高速宁攀段。蜀道集团 供图

  当日,宜攀高速全线最长隧道——宁会隧道贯通。这条全长约10.3公里的超特长隧道是宜攀高速控制性工程,位于凉山州宁南县与会东县交界处。隧道最大埋深883米,穿越瓦斯、大变形、岩溶涌突水、涌突泥等不良地质段,全程均为Ⅳ、Ⅴ级围岩,堪称一座“地质迷宫”。

  现场施工负责人介绍,自2020年6月正式进洞施工以来,宁会隧道项目历经5年攻坚,累计遭遇大型溶洞、暗河、突泥涌水等地质灾害达60余次,隧道日均涌水量峰值超10万立方米,可填满约40个标准奥林匹克游泳池,其施工难度、安全风险与技术要求均属国内罕见。

  宜攀高速全长446.36公里,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。其中,宁攀段起于凉山州宁南县城南,经宁南县、会东县、会理市、盐边县,止于攀枝花市仁和区,项目全长166.167公里,全线桥隧比69%,概算总投资297.62亿元。

  宜攀高速宁攀段全线通车后,宁南县至攀枝花市的通行时间将从当前的5小时缩短至2小时,极大提升区域间交通效率。(完)

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