雨水调蓄池理论技术研究

发布时间：2018-06-05 21:22

本文选题：调蓄池 + SWMM　；参考：《重庆大学》2013年硕士论文

【摘要】：调蓄池作为减轻城市洪水，控制面源污染的重要技术措施，，在国内外广泛运用。实践证明，调蓄池具有显著的社会效益、环境效益和经济效益，是三者的有效统一。论文对调蓄池池容计算，调蓄池影响因素分析，调蓄池与其他措施的经济性比较展开研究。本文对常规3种调蓄池的工作原理进行论述，对比国内外3种调蓄池池容计算的公式算法。同时以SWMM软件(暴雨管理模型)为例论述了洪峰流量调蓄池、面源污染控制调蓄池池容计算的流程，对于雨洪利用调蓄池池容计算，重点介绍我国目前推荐的简单算法和计算机计算的流程步骤。针对重庆地区，提出洪峰流量调蓄池的池容计算式，并用于第5章的实例中调蓄池的计算。调蓄池的池容大小和设置位置等参数与降雨条件，汇水区条件和管网情况密切相关。本文从理论上定性论述3种外部条件对于调蓄池设计参数的影响，其中，降雨条件中的降雨雨型和重现期对调蓄池影响最大，汇水区的不透水/透水性面积比例对于管网运行以及调蓄池设置影响显著，管网参数中管径和坡度等参数影响程度不大，需结合以上两种因素变化，分析其作用影响程度。对于3种外部影响因素探讨的同时，本文借鉴理想平流沉淀池的假设与颗粒除去率的算法，在理论上探讨洪峰流量调蓄池在进水不稳定和水面波动情况下，如何计算颗粒的沉降曲线、颗粒沉降速度和颗粒去除率。建议采用中试模型进行验证与改进。本文结合工程实例，将工程实例参数概化后输入SWMM模型后，运用正交试验对降雨重现期P、芝加哥雨型中雨峰位置r、汇水区的透水与不透水面积比例、管道管径、管道坡度和调蓄池不同位置的变化这个6个因素安排了25次试验，每个因素的5水平均匀分布在25次试验中，分析计算模拟结果，发现对于雨水排水系统洪流产生影响因素最大的两个因素为降雨重现期和汇水区透水/不透水面积比例，其次是调蓄池设置位置。本实例中，管网的上下游均有溢流严重的点，发现在溢流严重两个点之间设置调蓄池效果最佳。本文结合相同实例，在降雨重现期P=5，汇水区部透水性比例为60%的情况下，以效益/费用为原则，论证3种技术方案（上游修建容积较大调蓄池、完全放大干管坡度、上游修建池容较小调蓄池+放大部分干管坡度）在同等程度减轻洪流量的情况下，对比投资造价，结果修建调蓄池与放坡结合的方案与单独放坡的技术方案，经济上相差不大。证明仅就控制洪峰而言，调蓄池在经济上可行。
[Abstract]:As an important technical measure to reduce urban flood and control non-point source pollution, the storage tank is widely used at home and abroad. Practice has proved that the storage pool has remarkable social benefit, environmental benefit and economic benefit, which is an effective unity of the three. In this paper, the calculation of the storage tank capacity, the analysis of the factors affecting the storage tank, and the economic comparison between the storage tank and other measures are carried out. In this paper, the working principle of three kinds of conventional storage tanks is discussed, and the formula algorithms for calculating the capacity of three kinds of storage tanks at home and abroad are compared. At the same time, taking the SWMM software (rainstorm management model) as an example, this paper discusses the flow chart of calculating the capacity of the Hong Feng flow regulating pool and the non-point source pollution control regulating pool, and calculates the capacity of the regulating pool by using the rain flood. This paper mainly introduces the recommended simple algorithm and the procedure of computer calculation in our country. For Chongqing area, this paper puts forward the calculation formula of Hong Feng flow storage pool, and applies it to the calculation of the storage pool in Chapter 5. The parameters of tank capacity and location are closely related to rainfall conditions, catchment conditions and pipe network conditions. In this paper, the influence of three kinds of external conditions on the design parameters of the storage tank is discussed qualitatively in theory. Among them, the rainfall type and the recurrence period in the rainfall condition have the greatest influence on the storage tank. The ratio of impermeable / permeable area has a significant effect on the operation of the pipe network and the setting of the storage pool. The influence of pipe diameter and slope on the pipe network parameters is not significant. Therefore, it is necessary to analyze the influence degree of the above two factors according to the changes of the above two factors. In this paper, the assumption of ideal advection sedimentation tank and the algorithm of particle removal rate are used for reference to discuss three kinds of external influence factors, and the Hong Feng flow regulating tank under the condition of influent instability and water surface fluctuation is discussed theoretically. How to calculate the settlement curve of particles, particle settling velocity and particle removal rate. The pilot model is recommended for verification and improvement. In this paper, combined with engineering examples, the parameters of engineering examples are generalized and input into the SWMM model. The orthogonal test is used to analyze the rainfall recurrence period P, the location of rain peak in Chicago, the ratio of permeability to impermeability area in catchment area, and the pipe diameter. Six factors, the slope of pipeline and the change of different position of storage tank, arranged 25 tests. The 5 levels of each factor were evenly distributed in 25 tests. The simulation results were analyzed and calculated. It is found that the two most influential factors for the flood flow of Rain Water drainage system are the recurrence period of rainfall and the ratio of permeable / impermeable area in the catchment area, followed by the location of the storage tank. In this example, there are serious overflow points in the upstream and downstream of the pipe network, and it is found that it is the best to set up the storage tank between the two points of the serious overflow. Combined with the same example, in the case of P5 of rainfall recurrence period and 60% of permeable water in catchment area, based on the principle of benefit / cost, this paper demonstrates three technical schemes (large volume storage tank built upstream, completely magnifying the slope of main pipe, etc.) In the case of reducing flood discharge to the same extent, compared with the investment cost, the result shows that the scheme of combining the construction of the storage pool with the sloping slope and the technical scheme of separate sloping have little difference in economy. It is proved that the storage pool is economically feasible only for controlling Hong Feng.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU992.24

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