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平屋面排水一般常用的做法是,在女儿墙或挑檐上安装铸铁雨水口,在雨水口下部的墙面上,固定铁皮雨水斗,斗下沿墙面安装水落管,见图1。雨水斗有二个作用:一是屋面大量雨水经过雨水口流入雨水斗,因雨水斗容积较大,雨水便迅速排向雨水斗,再经过雨水管排走。二是可以弥补雨水口安装位置的误差,保证雨水管的中心位置。如果雨水
The common practice of flat roof drainage is to install cast-iron gutters on the parapets or provocations. On the lower wall of the gutters, fixed metal rainwater buckets, and install downpipes along the walls under the buckets. See Figure 1. The rainwater bucket has two functions: First, a large amount of rainwater from the roof flows into the rainwater bucket through the rainwater inlet. Because of the large volume of the rainwater bucket, the rainwater is quickly discharged into the rainwater bucket and then drained through the rainwater pipe. The second is to make up for the error in the installation location of the rainwater outlet and ensure the central position of the rainwater pipe. If rain