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施工现场的上水管道有干管和支管。主干管大部分埋至冰冻线以下,冬季施工时不必考虑保温。但有些支管,由于种种原因,没有保温,在冬施中出现冻结。我们在某地施工宿舍楼时,因为需要埋设水管的地方都已经做好混凝土面层。如果采取打开混凝土面层,挖淘埋管的方法进行保温,既费时又费工,施工完毕还得补浇混凝土面层。为了节约工时、材料,我们采取了排空水管法防冻。具体作法如下:
The construction site has dry and branch pipes in the upper water pipeline. Most of the main pipes are buried below the freezing line, and there is no need to consider insulation during winter construction. However, some branches, due to various reasons, did not keep warm and frozen in the winter. When we built the dormitory in a certain place, we had already finished the concrete surface because we needed to place water pipes. If you take the method of opening the concrete surface and digging the buried pipe to insulate it, it is time-consuming and labor-intensive. After the completion of the construction, you have to fill the concrete surface. In order to save man-hours and materials, we have adopted an antifreeze method of emptying water pipes. The specific practices are as follows: