某派出所综合办公楼工程在交付使用时,建设单位通知施工单位在办公楼走廊一端变更增加洗手盆(图1),将洗手盆下水管穿墙接在卫生间排水立管上。工程交付使用一年后,走廊地面出现渗漏现象,顶棚涂料局部起皮、脱落,地面由于滴水珠,地板砖被污染(泛黄斑),严重影响了正常使用及美观。一、漏水原因(1)走廊地面未做防水,在洗手 At the time of delivery and use of a general office building project of a police station, the construction unit notified the construction unit to change the wash basin (Figure 1) at the end of the corridor of the office building and connect the washbasin downpipe to the wall and to the bathroom drainage riser. After one year of project delivery, the corridor surface seepage occurred. The ceiling paint partially peeled and fell off. The floor was contaminated with dripping beads and floor tiles (macula), seriously affecting the normal use and beautiful appearance. First, the reasons for leakage (1) Corridor did not do waterproofing, washing hands