过去,为了保证现浇框架柱主筋位置正确,多采用带细铅丝的砂浆垫块绑扎在钢筋上的方法。但这种方法在浇灌混凝土时,容易把砂浆块碰掉或挤到一边,造成钢筋位移、保护层过大或过小等现象。最近,我们在某工程现浇框架混凝土结构施工中,采 In the past, in order to ensure the correct position of the main ribs of the cast-in-place frame columns, the method of tying steel bars with fine-grained mortar pads was used. However, when this method is used for pouring concrete, it is easy to bump or squeeze the mortar block to the side, resulting in the phenomenon of the displacement of the steel bar, the overcoat layer being too large or too small. Recently, we adopted the construction of cast-in-place concrete structures for a certain project.