我社办公楼建于50年代,屋面为多脊瓦顶集中排水,四周女儿墙为1.5m高。固定排水沟铁皮的木砖,由于年久开裂,与铁皮分离,到了雨季,雨水从墙的四周流入室内,几经修缮仍然解决不了,主要原因是木砖不起作用。去年我们用塑料膨胀螺栓代替木砖,经过一年的试用,现很坚固。具体作法:选用长4.5cm、直径为0.8cm的塑料膨胀螺栓,用电钻将铁皮及砖墙打个直径为0.8cm、深3cm的孔,然 The office building of our company was built in the 50’s, and the roof is drained by a multi-ridge roof, and the parapet wall is 1.5m high. The wooden bricks that fix the drain metal sheets are separated from the iron sheets due to long-term cracking. During the rainy season, the rainwater flows into the room from the four sides of the wall. After several repairs, it still cannot be resolved. The main reason is that the wooden bricks do not work. Last year we used plastic expansion bolts instead of wooden bricks. After a year of trials, it is now very strong. Specific practice: Use a plastic expansion bolt with a length of 4.5 cm and a diameter of 0.8 cm. Use a drill to drill a hole with a diameter of 0.8 cm and a depth of 3 cm.