预应力钢筋混凝土空心板是我国城乡建设中广泛推广使用的一种混凝土建筑构件。空心板在出厂使用前必须堵头。其主要作用是提高板端承载能力,同时也利于提高隔声、隔热和防渗效果。为了达到上述目的,堵头必须堵塞严实。但多数预制构件厂都没有在构件出厂前按照上述要求在厂内进行堵 Prestressed reinforced concrete hollow slab is a kind of concrete building component that is widely used in urban and rural construction in China. Hollow plates must be plugged before being shipped from the factory. Its main role is to improve the carrying capacity of the board, but also help improve the sound insulation, heat insulation and seepage control. In order to achieve the above purpose, the plug must be plugged tightly. However, most of the prefabricated component factories did not block the plant in accordance with the above requirements prior to the delivery of the components.