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设计时速350公里！这条高铁最大断面隧道贯通

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设计时速350公里！这条高铁最大断面隧道贯通

时间:2025-10-22 11:10:20 阅读（143）

成渝中线高铁最大开挖断面隧道——棕树坡隧道顺利贯通。

◎ 科技日报记者何亮

记者从国铁成都局获悉，是成渝中线高铁全线开挖断面之最，其最大开挖面积达184.26平方米，设计时速350公里。线路自重庆枢纽重庆北站起，全长1088米，正线全长292公里，

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