基于韧性理念的海堤越浪排水规划设计研究

Research on Planning and Design of Seawall Overtopping Drainage Based on the Resilient Concept

现行海堤越浪水量主要依赖与堤身合建的排水沟实现灰色转移和排放,堤面污染物无法得到有效去除,更难以有效应对超标降雨和极端风暴潮,灾后恢复进程缓慢。韧性海堤概念的提出,带来了越浪排水设计理念的更新,要求在基础排水设施建设上有预见性地打造韧性城市,重视排水系统的自然导向和弹性抗冲击能力。以马骝洲水道北堤岸整治修复工程为例,在挡水、防浪功能分置的框架下,对韧性海堤越浪排水规划和设计进行研究,通过优化堤后带竖向设计构建多功能、多层次的韧性防护体系,可综合实现韧性防灾功能。

At present,the water volume of seawall mainly depends on the drainage ditch built together with the levee to realize gray regulation and discharge.The pollutants on the embankment surface can not be effectively removed,and it is more difficult to effectively cope with excessive rainfall and extreme storm surge,resulting in a slow post‑disaster recovery process.The concept of resilient seawall brings the renewal of seawall drainage design concept,which requires the construction of infrastructure drainage facilities to build resilient cities in a forward‑looking way and pay attention to the natural orientation and elastic impact resistance of the drainage system.Taking the restoration project of the north bank of Maliuzhou waterway as an example,this paper has studied the planning and design of the resilient seawall over the wave under the framework of separating the functions of retaining water and preventing waves.By optimizing the vertical design of the back zone of the embankment,a multi‑functional and multi‑level resilient protection system is constructed,and the resilient disaster prevention function is fully realized.