不同偏置方式对专用通气排水系统排水特性的影响

Study on water capacity of building drainage system under long distance pipe offset

排水管道偏置常常应用于商住两用的高层建筑中,但是这类设计会造成排水流态变化,导致管道内出现巨大压力波动,破坏卫生器具水封,污染室内环境。针对偏置距离为1.0 m、1.5 m两个场景开展了试验。试验在60 m高全尺寸实验塔中展开,采用定流量法,通过压力极限值和水封损失值来比较不同偏置距离下系统的最大通水能力。结果表明,这两个偏置距离对建筑排水系统的通水能力均有极大负面影响,通水能力降低50%以上,偏置距离1.5 m较1.0 m的负面影响更大。

Drainage pipe offset is often used in high-rise buildings for both commercial and residential purposes,but this kind of design will cause changes in drainage flow pattern,resulting in fierce pressure fluctuations in the pipe system,damaging the water seal of sanitary appliances and polluting the indoor environment.Existing studies have discussed the characteristics of short-distance offset,and this paper carries out tests for scenarios with offset distances 1.0 m and 1.5 m.The test was carried out in a 60 m high full-size experimental tower.The constant flow method was used to compare the maximum water discharge capacity of the building drainage system at different offset distances by comparing pressure limit values and water seal loss values.The results show that this two long-distance offset groups have great negative effects on the water flow capacity of the building drainage system(decreasing more than 50%),and the longer the offset distance,the greater the negative effect.