盖挖顺作法的施工顺序:自地表向下开挖一定深度后先浇筑顶板,在顶板的保护下,自上而下开挖、支撑,达到设 计高程后()浇筑结构。A.由下向上 B.由上...

作者: rantiku 人气: - 评论: 0
问题 盖挖顺作法的施工顺序:自地表向下开挖一定深度后先浇筑顶板,在顶板的保护下,自上而下开挖、支撑,达到设 计高程后()浇筑结构。
选项 A.由下向上 B.由上向下 C.由中间向两端 D.由两端向中间
答案 A
解析

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