One tunnel is being constructed by TBM. Its lining adopts precast concrete hexagonal segment.

某隧洞工程采用TBM施工，六边形预制钢筋混凝土管片衬砌。

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One tunnel is being constructed by TBM. Its lining adopts precast concrete hexagonal segment.

某隧洞工程采用TBM施工，六边形预制钢筋混凝土管片衬砌。

youdao