我国大量生产的预制混凝土圆孔板安装后多嵌入墙内,要承受一定的压力,有些还要在端部现浇混凝土以加强整体性。因此,在预制板养护出池以后多要用砖或混凝土块堵头,以保证板端的局部抗压性能和现浇混凝土的密实性。但在实际施工时堵头往往采用规格不一的碎砖,即使用预制混凝土块堵塞也由于尺 China’s mass production of precast concrete circular hole plate is more embedded in the wall after installation, and it needs to withstand certain pressure, and some also need to cast concrete at the end to enhance the integrity. Therefore, after the prefabricated slab is maintained out of the pool, brick or concrete block plugs are used to ensure the local compressive strength of the plate ends and the compactness of the cast-in-place concrete. However, in practice, plugs often use broken bricks of different specifications, that is, blockage due to the use of precast concrete blocks.