论文部分内容阅读
在生产自应力压力管时,钢筋骨架是在滚焊机上一次点焊而成的,环筋直径各处均匀一致。但承口过渡区的砼截面积与管身的砼截面积相差较大,从而使整个管体的配筋率不能保持一致,承口薄弱,抗裂较差。为此,有关资料强调指出,(?)500mm以上的自应力压力管,其承口必须增设附筋圈来克服配筋率的不足。承口附筋圈一般采用机械或手工制作,然后通过撑脚绑扎在钢筋骨架内。这种增设方式虽然弥补了配筋率的不足,但却阻碍了
In the production of self-stressing pressure pipes, the steel skeleton is formed by spot welding on a roll welder, and the diameter of the ring bars is uniform throughout. However, the cross-sectional area of the transition area of the socket mouth is different from the cross-sectional area of the pipe body, so that the reinforcement ratio of the entire pipe body cannot be kept the same, the socket is weak, and the crack resistance is poor. For this reason, the relevant data emphasizes that self-stressing pressure pipes with (?) 500mm or more must be provided with additional reinforcement rings to overcome the shortage of reinforcement ratio. The mouth reinforcement ring is usually made by hand or mechanically, and then it is tied in the reinforcing steel skeleton by legs. Although this method of addition has made up for the lack of reinforcement ratio, it has hindered