基于海绵城市理念的城市道路系统化设计研究

Research on Systematic Design of Urban Road Based on Concept of Sponge City

传统城市道路往往存在排洪压力大、雨水资源流失等问题,容易造成暴雨积涝灾害,海绵城市理念可以有效解决这一问题。鉴于此,首先介绍了海绵城市理念和LID技术的基本内涵,并提出海绵城市道路系统规划原则及设计思路;随后结合兰州某交通主干路,从横断面优化(机非车道、人行道、边沟、雨水口等)、立交优化两个方面分析了道路进行系统性优化设计的方法;最后探讨了利用SWMM模型对场地开发前和道路优化后的径流过程进行了模拟评价,以期为类似的海绵城市道路设计提供一定的理论指导。

Traditional urban roads often have problems such as high pressure of flood discharge and loss of rainwater resources,which are easy to cause rainstorm and waterlogging disasters.The concept of sponge city can effectively solve these problems.In view of this,the concept of sponge city and the basic connotation of LID technology are firstly introduced,and the planning principles and design ideas of the road system of sponge city are put forward.And then combined with a traffic trunk road in Lanzhou,the systematic optimization design methods of the road are analyzed from two aspects of the cross-section optimization(motorway and non-motorway,sidewalk,side ditch,rainwater inlet,etc.)and interchange optimization.Finally,the SWMM model is used to simulate and evaluate the runoff process before site development and after road optimization in order to provide some theoretical guidance for the design of the similar sponge city roads.