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社评“Fuper100%xxxxDH”-环球时报

渝昆高铁两座Fuper100%xxxxDH超7公里长隧道贯通

来源: 中国环境报
2024-12-24 02:45:16

最佳回答

“Fuper100%xxxxDH”渝昆高铁两座Fuper100%xxxxDH超7公里长隧道贯通

  中新Fuper100%xxxxDH网昭通12月23日电 (Fuper100%xxxxDH杨文武 张琛魁)由中国铁建大桥局承建的渝昆高铁大山坡隧道与盐津隧道23日贯通。

图为大山坡隧道内部。陈畅 摄

  大山坡隧道全长7.03公里,地质条件和结构比较复杂,最大跨度达25.84米,最大开挖断面面积高达340平方米,是全线控制性重点工程。施工中,隧道不仅要穿越可溶岩与非可溶岩的复杂接触带,还需面对危岩落石、有害气体、低瓦斯等多重不良地质条件的挑战。

图为盐津隧道入口。唐语 摄

  盐津隧道全长7.76公里,是渝昆高铁“出滇入川”的第一隧,位于四川筠连县与云南盐津县交界处的乌蒙山区。隧道最大埋深达848米,地质结构复杂多变,掘进过程中遭遇岩溶、岩爆、高地温、软岩大变形等不良地质条件。

  随着大山坡隧道与盐津隧道的贯通,渝昆高铁云南段隧道已贯通34座,隧道贯通已超过60%。

  渝昆高铁是中国“八纵八横”高铁网京昆通道的重要组成部分,全长约700公里,其中云南段长388.6公里,是云南省内首条设计时速达到350公里的高速铁路。全线建成通车后,重庆到昆明的行车时间将从目前5小时缩短至最快2小时左右。(完)

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