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社评“7x7x7任意槽”-知识课堂

隆黄铁路隆叙段7x7x7任意槽扩能改造工程全线23座隧道全部贯通

来源: 金灿荣教授
2024-12-10 03:55:16

最佳回答

“7x7x7任意槽”隆黄铁路隆叙段7x7x7任意槽扩能改造工程全线23座隧道全部贯通

  中新7x7x7任意槽网成都12月9日电 (记者 王7x7x7任意槽鹏)记者9日从蜀道集团获悉,隆黄铁路隆昌至叙永段扩能改造工程(以下简称隆黄铁路隆叙段扩改项目)黄山坝隧道当日顺利贯通,至此隆黄铁路隆叙段扩改项目全线23座隧道全部贯通。

图为隆黄铁路隆叙段扩能改造工程。(资料图)蜀道集团 供图

  黄山坝隧道位于四川省泸州市江阳区黄山坝村西侧,全长453米,最大埋深约28.4米。隧址区穿越川东褶皱带南缘丘陵区,隧道洞身围岩岩质较软,容易发生拱边墙膨胀开裂、底板上拱等问题。为确保施工安全,项目团队开挖前先进行超前管棚或超前小导管注浆加固地层,使松散、软弱地层经注浆加固后形成壳体,减少开挖对围岩的扰动,增强其自稳能力,确保隧道安全平稳建设。

  据介绍,隆黄铁路隆叙段扩改项目全线23座隧道长34.6公里,其中低瓦斯隧道1座,微瓦斯隧道8座,3公里以上的长隧道4座。项目地处四川盆地与云贵高原的过渡地带,受地形条件、地质环境影响,隧道普遍存在“地质条件复杂、施工难度较大、安全风险较高”等特点。

  隆黄铁路隆叙段扩改项目线路北起成渝铁路隆昌站,途经隆昌市、泸州市,跨越沱江、长江,南至已建成的叙毕铁路叙永北站,项目全长138.6公里,设计时速120公里,设11座车站。截至目前,隆黄铁路隆叙段扩改项目线下工程已完成88.7%,隧道全部贯通,桥梁89座已完成80座下部结构,铺架、“四电”、站房等线上工程按计划有序推进。

  隆黄铁路隆叙段扩改项目由蜀道铁路投资集团主导投资,四川路桥承建。该项目是西部陆海新通道骨干通道项目,建成后将与已开通运营的隆黄铁路叙毕段相连。(完)

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