江门体育馆屋面虹吸雨水系统设计  

Design of Siphonic Drainage System for Jiangmen Gymnasium Roof

作　　者：杨静琨 YANG Jing-kun(Architectural Design and Research Institute of Guangdong Province, Guangzhou 510010, Chin)

机构地区：[1]广东省建筑设计研究院,广东广州510010

出　　处：《中国给水排水》2018年第10期37-42,共6页China Water & Wastewater

摘　　要：结合江门体育馆异型屋面的特点,探讨了雨水排水系统的比选、暴雨重现期及流量校正系数等设计参数的选取。大型异型屋面宜采用虹吸雨水排水系统,暴雨重现期宜取100年,重点区域屋面流量校正系数宜取1.2。对某已建体育馆的分析结果表明,焊接点处点状腐蚀是钢制天沟漏水的主要原因,因此该工程提出了雨水斗与天沟采用相同材质、设置下沉式集水井及挡水板、搭接处理天沟伸缩缝的组合优化方案。采用曼宁公式对屋面直立锁边系统排水安全性进行了校核,系统排水量满足重现期条件下的降雨量。在淤泥质土条件下设置管沟,提高了管线安全性及检修维护的便利性,为类似工程设计提供参考。According to the comparison of the rainwater drainage hetero-type roof of Jiangmen Gymnasium, this paper discussed the system, selection of design parameters such as the recurrence interval and flow correction coefficient. The siphonic drainage system was adopted in the large hetero-type roof. In addition, the recurrence interval was determined as 100 years, and the flow correction coefficient of key areas was decided as 1.2. Based on the analysis of a built gymnasium, pitting corrosion at the solder joints was considered as the main factor causing the leakage of steel gutter. The combined prioritization scheme such as the roof drain and the gutter adopting the same material, setting the sinking water- collecting well and the baffle, and connecting treatment of the expansion joint were proposed. Security check of the standing seam system with Manning Formula was conducted. The results indicated that the water discharge could meet the rainfall at recurrence interval condition. The measure that tunnel was set under the mucky soil could improve the security of pipes and convenience of maintenance. The results of this paper could present a reference for similar project.

关 键 词：体育馆 大型异型屋面 虹吸雨水排水系统 不锈钢天沟 直立锁边系统 管沟 

分 类 号：TU992[建筑科学—市政工程]