在超高层足尺试验塔上,设置两种不同高度的排水系统,分别采用定流量法与瞬间流量法,考察DN150铸铁伸顶通气系统内的压力分布情况,探究压力与流量之间的相关性,最终确定排水系统高度与通水能力之间的关系。结果表明,在定流量法中,超高层排水系统的排水能力小于小高层排水系统;在瞬间流量法中,超高层排水系统与小高层排水系统的排水能力基本相同。 Two sets of drainage systems with different heights were set up on the full-scale high-rise test tower. The pressure distributions in DN150 cast iron extension ventilation system were investigated by constant flow method and transient flow method respectively, and the correlation between pressure and flow rate was investigated , Finally determine the relationship between drainage system height and water capacity. The results show that in the constant flow method, the drainage capacity of the super high-rise drainage system is smaller than that of the small high-rise drainage system. In the instantaneous flow method, the drainage capacity of the super high-rise drainage system and that of the high-rise drainage system are basically the same.