中天广场办公楼施工至３０层时,靠近混凝土泵出口的管夹常被拉爆,造成泵机受冲击后移位,甚至截止阀也被拖动变形不能正常开合,致使泵送一度受阻。产生这一现象的原因是泵管受混凝土对管道壁的摩擦力而窜动,产生轴向位移,混凝土压出时泵管被推向前,泵送间歇时垂直管道中的混凝土 When the office building of Zhongtian Plaza is constructed to the 30th floor, the pipe clamps near the concrete pump outlet are often exploded, causing the pump to be displaced after being impacted, and even the globe valve is dragged to deform and cannot normally open and close, causing the pumping to be blocked once. . The reason for this phenomenon is that the pump pipe is swayed by concrete’s friction against the pipe wall, resulting in axial displacement. When the concrete is pushed out, the pump pipe is pushed forward, and the concrete in the vertical pipe is pumped intermittently.