为了防止水泥砂浆堵塞通道,封闭前还需沿裂缝铺设通长油毡或镶薄铁皮等,再将备好的注浆管插入铁皮内,然后用快干水泥或水泥-水玻璃浆封闭裂缝,最后用水泥砂浆找平.注意新老封闭材料的结合,如结合不好,则会因为浆液遇水反应、发气、膨胀,内部压力增高,使大量浆液外逸,以至不能渗入预定部位,同时浪费了浆液,因而需耐心细致地做好封闭工作,以期达到处理效果. In order to prevent the blocking of cement mortar channel, closed before the need to lay along the crack long linoleum or thin iron, etc., and then prepared into the grout pipe, and then use quick-drying cement or cement - water glass paste to close the cracks, and finally With cement mortar leveling.Note that the combination of old and new closed materials, such as the combination is not good, it will because the slurry water reaction, gas, expansion, increased internal pressure, so that a large number of slurry escape, and can not penetrate the predetermined site, while wasting Slurry, which need to be patient and meticulous to do closed work, in order to achieve the effect of treatment.