高架桥排水设施优化探讨

Discussion on Drainage Facilities Optimization of Urban Viaduct

高架桥在缓解城市交通压力方面发挥了重要作用。然而,作为高架桥附属设施的排水工程容易被忽视,存在设计标准低、排水能力弱、系统安全性差等问题,给城市生命线系统的安全运行带来了潜在风险。根据GB 50014—2021《室外排水设计标准》与CJJ 11—2011《城市桥梁设计规范》(2019年版)进行了高架桥排水设计计算,认为现行排水设施设计标准有待提高。为了最大程度保障高架桥排水安全,提出了增加雨水口数量、改变雨水口形式、严控悬吊管安装、丰富收水形式、调整雨水流态、预留超负荷排水溢流口和采用新型专用管材等措施优化高架桥排水设施,提高其排水效能;此外,强调了与高架桥排水相关的桥梁总体设计要点,为今后高架桥建设提供了新思路。

Viaducts have a critical role in relieving traffic pressure of cities. However, the drainage system which is auxiliary facilities of urban viaduct is easy to be neglected. Because of low design standard, insufficient drainage capacity and poor system safety, it causes potential risks of the urban lifeline system safety. Based on Design Standard for Outdoor Drainage GB 50014—2021 and Code for Design of Urban Bridges CJJ 11—2011(2019 edition), the design calculations of drainage were conducted and the current design standards of drainage facilities is thought to be improved. In order to the greatest ensure the drainage safety of urban viaduct, the optimization measures of increasing the number of inlets, changing the type of rainwater inlet strictly controlling the installation of suspension pipe,enriching the water collection forms, adjusting the rainwater flow pattern, reserve overload drainage overflow and adopting new special pipes were proposed to improve the drainage efficiency;The overall design points of the viaduct related to runoff drainage are emphasized. This paper provides new ideas for the construction of viaduct in the future.