城市高架桥排水相关计算及设计优化

Calculation and Design Optimization of Urban Viaduct Drainage

摘要:

随着城市化进程不断加速，高架桥作为缓解交通压力的重要基础设施，其排水系统性能直接关系到行车安全、桥梁结构耐久性。极端降雨下城市高架桥积水事件频发，凸显排水系统优化的紧迫性。通过对比桥梁及排水相关规范，对桥面排水口规格及数量、悬吊管管径坡度、立管管径等影响高架桥排水能力的几个重要因素进行分析。以合肥为例，核算不同车道数下所需的排水设施的最小设计规模，提出纵坡段、凹曲线段、超高段高架桥排水的优化策略。该研究成果可为城市高架桥排水设计及提标改造提供参考。

Abstract:

With the accelerated urbanization process, viaducts serve as vital infrastructure for easing traffic congestion. The performance of their drainage systems is closely linked to driving safety and the durability of bridge structures. Frequent waterlogging on urban viaducts during extreme rainfall highlights the urgency of drainage system optimization. By referring to relevant codes for bridges and drainage engineering, the key factors of size and layout quantity of deck drains, pipe diameter and slope of suspended pipes and diameter of vertical pipes affecting the drainage capacity of viaducts are analyzed. Taking Hefei as an example, the minimum design scale of drainage facilities for viaducts with different lane numbers is calculated. The optimization strategies for viaduct drainage on longitudinal grade sections, concave curved sections and superelevation sections are proposed. The research findings can provide a reference for the design, upgrading and reconstruction of drainage systems on urban viaducts.