【作者】 官钰希； 任少龙； 吴克建； 方正；

【Author】 Yuxi Guan;Shaolong Ren;Kejian Wu;Zheng Fang;School of Civil Engineering,Wuhan University;Shanxi Xuanshi Industrial Group CO.,LTD.,National Building Drainage System Technology Center Laboratory;

【机构】 武汉大学土木建筑工程学院； 山西泫氏实业集团有限公司全国建筑排水管道系统技术中心实验室；

【摘要】 高层、超高层建筑中建筑排水系统为了解决梁柱错位安装通常会采用乙字弯偏置,但这种设置会对立管排水造成极大影响,本文对这种安装方式与标准防返流H管双立管排水系统进行了对比实验,观测了排水过程中各个楼层的压力波动、水封损失、排水系统通气量等特征参数。实验结果表明,安装乙字弯避梁的排水系统最大通水能力为6.5L/s,远小于未安装乙字弯的防返流H管双立管排水系统(11.0L/s),在乙字弯上方安装防返流H管工况下系统最大排水流量为8.0L/s,因此该措施能够减小乙字弯偏置对排水系统带来的正压影响,增大立管排水能力。更多还原

【Abstract】 In high-rise and ultra-high-rise residential buildings,the building drainage systems usually adopt the S-shaped offset pipe in order to keep clear of the beams and columns.However,the flow direction changes at the offset point which will greatly affect the building drainage capacity.The pressure fluctuation and water seal losses of a standard anti-reflux H-tube double-stack drainage system with and without an offset pipe in 4 th floor were compared.The experimental results show that the discharge capacity limitation of the drainage system with the offset joint is 6.5 L/s,which is much smaller than the anti-reflux H-tube double-stack drainage system without the offset joint(11.0 L/s).In the experiment with the offset joint,the pressure fluctuated fiercely at the position where flow direction changed and caused severe water seal losses of the floor drain and P-shaped trap.An improvement that adding another S-shaped offset joint above the original one was adopted to relieve the pressure fluctuation.In this situation,the drainage capacity limitation is 8.0 L/s.Therefore,this measure can suppress the pressure fluctuation exerted by the offset joint and increase the drainage capacity of the drainage system to some extent.更多还原