地铁车站顶板(逆筑法)施工阶段抗裂研究

分析了施工阶段地铁车站顶板裂缝的原因，根据实测数据计算了监测段的温度应力，施工阶段水化热不会引起地铁车站顶板开裂，设计类似结构时，可以不设施工手浇带。采用低低热水泥或降低水泥用量是减少水化热的关键。

A Study on Crack Resistance of Subway Station Top Floor during Construction

The cause of subway station top floor cracking during construction is analyzed, and the temperature stresses of the monitoring section are computed using the practical test data. It is pointed out that during construction the hydration heat will not cause the subway station top floor to crack, and that in designing structures of the same kind, it is unnecessary to design the after pouring construction joint. On the other hand, using cement of low hydration heat or decreasing the amount of cement is important.