城市树池现状及海绵型改进优化

Current Status and Improvement of Street Tree Cell Customized for Sponge City

城市树池是海绵城市建设中一种重要的技术设施,是城市道路、广场树木生长所需的人工构筑物,已有较多的应用。通过对比分析海绵城市建设中各种城市树池的建池原则、处理方式、植物灌溉、雨水回用等特点,基于低影响开发理念,设计并提出了一种能够有效净化初期径流并储存回用雨水的海绵型改进优化树池,并相应地提出了该新型树池的构造要求、设计方法与参数,结合海绵城市建设的年径流总量控制率指标要求,对其应用特点与要求进行了计算分析,结果表明,该设施具有径流控制与节水效果高、运行维护方便等优点。

As an important technique in the sponge city construction, street tree cells are necessary artificial structures for trees to grow on urban streets and open areas. Through the comparison and analysis of construction principles, treatment methods, plant irrigation and rainwater reuse of different street tree cells in the construction of sponge city, this paper introduced an improved and optimized street tree cell customized for sponge city, which could purify initial runoffs and store/reuse the rainwater, in alignment with the design concept of low impact development. This paper also proposed construction requirements, design methods and parameters for street tree cells. In combination with the annual total runoff control rate of sponge city, the application characteristics and requirements of street tree cells were calculated and analyzed. The results showed that this innovative street tree cell had the advantages such as runoff controls, efficient water consumptions, and low operation and maintenance requirements.