大体积钢筋混凝土底板的厚度一般超过1米,甚至达到几米。为了保证钢筋混凝土底板的上层钢筋在浇捣混凝土时不变形和不下沉,设计时增设一定的构造钢筋,或施工时有目的地用钢筋加固,这种构造钢筋和加固钢筋称为垂直撑筋。垂直撑筋的形式主要有(?)形和(?)形两种,(?)形垂直撑筋用的最多,间距一般为50～100厘 The bulk concrete floor thickness is generally more than 1 meter, even up to a few meters. In order to ensure that the steel bars in the upper floors of the reinforced concrete slabs do not deform or sink when they are poured concrete, certain structural reinforcements are added to the design, or they are purposely reinforced with steel reinforcement during construction. This type of construction steel reinforcement and reinforcement bar is called vertical bracing. The form of the vertical struts is mainly in the form of (?) and (?), and the vertical struts used in (?) form the most, the spacing is generally 50 to 100%.