设计重现期对城市内涝的影响研究

发布时间：2018-06-25 20:23

本文选题：城市内涝 + 设计重现期　；参考：《湖南大学》2015年硕士论文

【摘要】：城市频繁发生内涝灾害,暴露了城市规划、建设中存在问题。城市排水系统是维持城市的生存和可持续发展以及环境保护的重要工程措施。设计重现期既是暴雨强度公式重要的组成部分,也是雨水排水系统规划与设计的重要参数。重现期的选用是否合理关系到城市防洪排涝的安全。为了探究重现期对城市内涝的影响,本文主要从以下几个方面进行研究:首先,从设计流量计算方法、设计重现期两方面着手对比研究了国内外雨水排水系统设计规范标准,指出我国排水管网设计存在的问题。对比分析了国内部分大城市的城市雨水排水系统设计重现期标准,并以长沙市为例,研究了设计暴雨重现期对暴雨强度的影响。再次,介绍了几种可以适用于城市内涝计算的模型——SWMM模型、STORM模型、Wallingford模型,阐述了城市排水管网模型(Digital Water Simulation,简称DS)的计算原理和模型的构建与应用流程。并介绍了模型中淹没分析模块的设计流程与积水深度的计算方法。最后,为了合理地确定长沙市雨水系统规划设计重现期,采用基于社会总投入最低的案例分析方法进行分析,利用城市排水管网模拟系统(DS)软件模拟不同频率暴雨情况下道路的积水情况,建立数学模型进行经济分析计算,得到长沙市雨水系统规划适宜的设计重现期标准:对于一般地区重现期推荐取值3年,重要地区重现期推荐取值5年。该研究对提高城市雨水排水系统的可靠性和经济性具有指导意义。
[Abstract]:The frequent waterlogging disasters in cities expose the problems in urban planning and construction. Urban drainage system is an important engineering measure to maintain the survival, sustainable development and environmental protection of the city. The design recurrence period is not only an important component of the rainstorm intensity formula, but also an important parameter for the planning and design of Rain Water drainage system. Whether the selection of recurrence period is reasonable or not is related to the safety of urban flood control and drainage. In order to explore the effect of recurrence period on urban waterlogging, this paper mainly studies the following aspects: firstly, the design standards of Rain Water drainage system at home and abroad are compared from the design discharge calculation method and the design recurrence period. The problems of drainage pipe network design in China are pointed out. The design recurrence period of Rain Water drainage system in some big cities in China is compared and analyzed, and the influence of design rainstorm recurrence period on rainstorm intensity is studied by taking Changsha City as an example. Thirdly, this paper introduces several kinds of models which can be applied to urban waterlogging calculation, such as SWMM model and store model and Wallingford model, and expounds the calculation principle, model construction and application flow of digital water simulation model (DS). The design flow of the submerged analysis module and the calculation method of the depth of water are also introduced. Finally, in order to reasonably determine the recurrence period of Rain Water system planning and design in Changsha, the case analysis method based on the lowest total social investment is used to analyze. The urban drainage pipe network simulation system (DS) is used to simulate the water accumulation of roads under different frequency rainstorms, and a mathematical model is established to carry out economic analysis and calculation. The suitable design recurrence period standard for Rain Water system planning in Changsha is obtained: the recommended value for general area recurrence period is 3 years, and for important area the recommended value is 5 years. This study is of guiding significance for improving the reliability and economy of urban Rain Water drainage system.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU992

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