采暖管道或煤气管道在使用若干年后,往往因自然锈蚀而造成漏水、漏气,因为多数管道在穿楼板时没有预埋套管,拆换管道非常麻烦,且又浪费工料。为便于将来拆换管道,管道穿楼板可用加套管法。具体作法如下。先根据施工图统计出各种穿楼板管道的规格与数量,然后计算出楼板的实际厚度(包括 After several years of use, heating pipes or gas pipes often cause leakage and air leakage due to natural rust, because most pipes do not have pre-embedded casing when they are worn through the floor. It is very troublesome to dismantle pipes, and wastes manpower. In order to facilitate the replacement of pipelines in the future, pipelines can be piped through floors. The specific practices are as follows. First, according to the construction drawings, the specifications and quantities of various floor slabs are calculated, and then the actual thickness of the slab is calculated (including