前言随着城市的飞速发展,下水道系统也要相应提高等级。一种非常有效的方法是用塑料管,即高密度聚乙烯(HDPE)管对原有的下水管道重作里衬。这种高密度聚乙烯管的里衬是拉入或顶进去的,而旧的管道与新的里衬之间的环状间隙,是用低密度的多孔泡沫混凝土填塞的,以防止将来里衬的损坏。用本方法修复旧的下水管道,可使挖方最为最小,而其成本也是最低。 Preface With the rapid development of the city, the sewer system should also be upgraded accordingly. A very effective method is to use a plastic pipe, or HDPE pipe, to rebuild the original sewer pipe. The lining of this HDPE pipe is drawn in or in and the annular gap between the old pipe and the new lining is filled with low-density cellular foam concrete to prevent future lining Damage. With this method to repair the old sewer pipes, excavation can be minimized, and its cost is also the lowest.