飞灰厂（地下排水管安装注意事项） Fly ash plant (precautions for installation of underground drainage pipes)

其施工要点为：

The key points of its construction are:

先用HDOE膜制成作一个喇叭状的管套，小半径与穿模管口经一致，大半径在0.8米左右（具体尺寸安装时再确定）并分成6--8小片，然后把管套按由大到小的先后顺序套进穿垻管，根据现场实际情况调整好管套的位置并用热风枪进行临时稳固，此时应该注意不能让管套有悬空的部位，最后分别把套管的大、小套口焊接在防渗层HDPE膜面和管上，且在HDPE管处另加不锈钢箍。

First, use HDOE film to make a trumpet shaped pipe sleeve, with a small radius that is consistent with the mold opening, and a large radius of about 0.8 meters (specific size will be determined during installation) and divided into 6-8 small pieces. Then, insert the pipe sleeve into the dam pipe in order of size from large to small, adjust the position of the pipe sleeve according to the actual situation on site, and use a hot air gun to temporarily stabilize it. At this time, it should be noted that there are no suspended parts of the pipe sleeve, and finally, separate the large and small parts of the sleeve The small sleeve is welded on the HDPE film surface and pipe of the anti-seepage layer, and a stainless steel hoop is added at the HDPE pipe.