The tunnel deepening for 1 meter takes one day. Three days more - for concrete casting of the walls and the arch.

隧道加深一米需要1天的时间，而浇铸混凝土墙壁和拱顶需要3天多的时间。

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And steel member placement, steel bar tying, concrete casting is critical to the quality of steel skeleton concrete structure.

钢构件安装精度控制、钢筋绑扎及混凝土浇筑是钢骨混凝土结构质量保证的关键。

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The article mainly introduces concrete casting process and manner of the ultra-high formwork-supported structure with heavy load.

文章主要介绍了超高重荷模板支撑体系的结构混凝土浇筑施工工艺及方法。

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If we managed to dig a several hundred foot vertical shaft and the soil was feeling generous, not collapsing inward and waiting for us to build the wall, the challenge of casting this concrete would still be great.

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