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“欧美❌❌❌❌❌❌JAPPT”-环球时报

四川西昌至云南欧美❌❌❌❌❌❌JAPPT昭通高速贡觉高山隧道掘进破万米

来源: 深圳特区报
2024-12-16 05:39:15

最佳回答

“欧美❌❌❌❌❌❌JAPPT”四川西昌至云南欧美❌❌❌❌❌❌JAPPT昭通高速贡觉高山隧道掘进破万米

  中新欧美❌❌❌❌❌❌JAPPT网凉山12月15日电 (记者 欧美❌❌❌❌❌❌JAPPT王鹏)15日,四川西昌至云南昭通高速公路(简称西昭高速)贡觉高山隧道掘进突破万米大关。

图为贡觉高山隧道进口。中铁一局 供图

  西昭高速连接四川省西昌市和云南省昭通市,其中利用沿江高速共线段16.7公里、新建168.1公里,全线采用四车道高速公路标准建设,设计时速80公里。

  位于四川省凉山州昭觉县的贡觉高山隧道,全长约12公里,是西昭高速全线控制性工程。该隧道地质条件复杂,穿越数条断裂构造带,且隧址处于高海拔地区,是全线海拔最高点,施工难度大、周期长。施工过程中,技术团队先后攻克了高地应力、软岩大变形、洞口滑坡、洞口段浅埋偏压、突泥涌水、炭质页岩等技术难题。

  “贡觉高山隧道每日最大排水量达3万立方米,相当于每天注满15个标准泳池,开工至今隧道总涌水量达5100万立方米。”中铁一局项目负责人高健介绍,在实际涌水量大于设计涌水量近百倍的条件下,施工过程中采取“三级固定泵站+临时泵站+掌子面移动泵站”的方式进行反坡抽排水作业,有效的降低了反坡排水对施工进度的影响,加快了施工进度。

  西昭高速于2021年10月开工建设,建设期5年,预计2026年下半年建成通车。该项目建成后,将与云南、贵州、广西等在建和规划的高速公路形成大通道,进一步完善西南公路运输网,加强成都、川南与攀西经济区的联系,对促进四川民族地区社会经济发展具有重要意义。(完)

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