摘要
屋面雨水排水性能对建筑物的整体质量起着至关重要的作用,随着现代建筑不断向着“大面积、大体量、大跨度”的方向发展,对屋面雨水排水系统的技术要求越来越高。针对北方某高铁站屋面结构特点及雨水安全排放问题,该高铁站房采用了虹吸雨水排水系统+独立重力溢流系统结合的模式,实际应用效果良好。以该高铁站为例,结合虹吸系统设计参数对设计重现期、天沟和溢流设计特点,通过将Darcy-Weisbach与Colebrook-White方程联用,并将摩阻系数λ和Swamee-Jain显式计算式进行迭代,从而确定了在水力计算中管段沿程水头损失所适用的计算方法,以期为大型屋面排水系统设计提供理论参考和科学支撑。
Roof rainwater drainage performance plays a vital role in the overall quality of buildings.With the continuous development of modern buildings towards the direction of"large area,large volume and large span",higher requirements are put forward for roof rainwater drainage system.According to the roof structure characteristics of the railway station in north China and the safe drainage of rainwater,the mode of"siphon rainwater drainage system/independent gravity overflow system"was adopted,and the practical application showed the excellent performance.Based on the design parameters of siphon system and the characteristics of return period,gutter and overflow,the Swamee-Jain explicit formula was used for iteration by combining Darcy-Weisbach with Colebrook-White formula and friction coefficientλ.Therefore,the applicable calculation method of head loss along the way was determined in hydraulic calculation which provided theoretical reference and scientific support for the design of large-scale roof drainage system.
作者
韩锋
李晓阁
王锦
王文瑾
窦蒙蒙
HAN Feng;LI Xiaoge;WANG Jin;WANG Wenjin;DOU Mengmeng(China Railway Construction Group Corporation Ltd.,Beijing 100040,China;Department of Municipal&Environmental Engineering,School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《给水排水》
CSCD
北大核心
2023年第11期105-110,共6页
Water & Wastewater Engineering
基金
中铁建设集团有限公司课题(LX21-43C)。
关键词
虹吸雨水排水
暴雨重现期
天沟和溢流
摩阻系数
水力计算
Siphon rainwater drainage
Heavy rain return period
Gutter and overflow
Friction coefficient
Hydraulic calculation