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在有主次梁的框架结构施工中,通常会遇到这样的问题:按图绑扎钢筋,在主次梁的节点处主次梁钢筋及板的钢筋纵横重叠,按混凝土现浇板面的设计标高浇筑混凝土,在主次梁节点区域混凝土保护层不能满足规范要求,甚至没有保护层;如果主次梁节点区域混凝土保护层满足规范要求,同时现浇板除板中心区域的板厚符合设计要求,则现浇板的周边和主次梁节点区域明显偏厚,一般偏厚20～30mm,形成一个锅状凹形。
In the construction of primary and secondary beams in the framework of the structure, usually encountered such a problem: According to the figure banding steel, the primary and secondary beams at the node beam reinforcement and plate length and breadth overlap, according to the design of concrete cast-in-place board Concrete pouring concrete, the primary and secondary beams in the node area of the concrete cover can not meet the norms, or even without protective layer; if the primary and secondary beam node area of concrete cover to meet the specifications, while the thickness of cast-in-board board center area meets the design requirements , Then the cast-in-board area and primary and secondary beam node area significantly thicker, generally partial thickness 20 ~ 30mm, forming a pot-shaped concave.