嘉闵高架JMB2-1标盖梁为倒“T”型结构,最大悬臂8.9 m。盖梁采用附着式支架施工方案。盖梁分2层浇筑,第二层浇筑的混凝土荷载由第一层盖梁承担,支架仅需考虑第一层混凝土浇筑时的荷载,节省了支架材料。采用高强度Cr Mn Ti销棒,直径减小为80 mm,减小了立柱预留孔截面尺寸。支架主梁在地面拼装成整体后,用吊机一次性安装就位。盖梁施工完成后,采用吊机将支架整体卸落至地面分解,降低了安全风险,提高了工效。 Jiamin elevated JMB2-1 standard cover beam for the inverted “T ” type structure, the maximum cantilever 8.9 m. Cover beam with attached bracket construction program. The cover beam is cast in two layers and the concrete load in the second layer is borne by the first cover beam. The support only needs to consider the load of the concrete pouring in the first layer and saves the support material. Using high strength Cr Mn Ti pins, the diameter is reduced to 80 mm, which reduces the cross-sectional dimension of the post reserved hole. Support the main beam in the ground assembled into a whole, with a crane installed in place. After the construction of the capping beam is completed, the whole cradle is disassembled to the ground by a crane to reduce the safety risk and improve the work efficiency.