我公司二工区施工的某住宅工程是外墙预制板和内墙大模板现浇结构高层建筑,其电气照明采用暗敷设充气塑料管及塑料插销盒等。由于当前供应的塑料插销盒质量不好,螺孔经常发生劈裂,插销固定不牢,影响质量,往往需要返工更换,造成浪费。我们曾在其它工程上以明插销代替,但影响建筑美观。为此,该工区水电队于1979年初开始作混凝土墙内预留洞代替电气插销塑料盒的试验。 A residential project constructed in the second engineering area of ​​our company is a high-rise building with prefabricated exterior walls and cast-in-place high-rise buildings with inner walls. The electrical lighting uses dark-laid inflatable plastic pipes and plastic latch boxes. As the quality of plastic plug boxes currently supplied is not good, the screw holes are often chapped, and the pins are not firmly fixed, affecting the quality, and often require rework and replacement, resulting in waste. We have used clear plugs instead of other projects, but it has affected the appearance of buildings. To this end, the hydropower station in the area started in early 1979 as a reserved hole in a concrete wall instead of an electrical plug plastic box.