泵送混凝土是用混凝土泵通过输送管道将拌合的混凝土压送到浇筑部位。因混凝土在输送管出口处具有初始速度,故泵送混凝土在浇筑过程中对水平模板的冲击荷载比传统浇筑法大。本文试对此进行计算分析。一、计算公式的推导设单位时间内泵送混凝土量为Q(m~3/h),泵车输送管的横截面积为A,混凝土在输送管内的平均流速(即混凝土在出料口的初速度)为V_0,则 V_0=Q/A (1) 设混凝土输送管出料口距模板面的垂直高度为h,则混凝土到模板面时的平均速度 Concrete pumping is the use of a concrete pump to transfer the mixed concrete to the pouring site through the conveying pipe. Because the concrete has an initial velocity at the outlet of the delivery pipe, the impact load on the horizontal formwork during the pouring of the pumped concrete is greater than that of the conventional pouring method. This article tries to do calculation and analysis. First, the derivation of the formula is to set the amount of concrete pumped per unit time to be Q (m~3/h), the cross-sectional area of ​​the pump truck duct is A, and the average flow rate of concrete in the duct (ie concrete at the discharge port) The initial velocity is V_0, then V_0=Q/A (1) Let the vertical height of the concrete delivery pipe outlet from the template surface be h, then the average velocity of the concrete to the template surface