砖混结构楼房,在楼梯间或楼房两端常设置垂直的垃圾道。在砌砖过程中,尽管刮除了砖缝中挤出的砂浆,但垃圾道内壁还不能保证平整光滑。一般设计要求在垃圾道内壁抹灰,做到平整、光滑。然而,垃圾道内空间窄小,当砌砖结束后 In brick-concrete buildings, vertical rubbish roads are often installed at both ends of a stairwell or building. In the bricklaying process, although the mortar squeezed out of the brick seams is scraped, the inner wall of the rubbish lining cannot be guaranteed to be smooth and smooth. The general design requires plastering the internal wall of the rubbish hopper to be smooth and smooth. However, the rubbish space is narrow, when the brickwork is finished