武汉市深隧工程环境影响评价及其防涝与控污功效分析

发布时间：2018-05-06 11:57

本文选题：排水深隧 + SWMM　；参考：《武汉理工大学》2015年硕士论文

【摘要】：当城区地表覆盖已基本定型,城市道路地下空间已被多种管线占据,如规划进一步增加城区的排水能力或将分散的污水处理厂外迁归一,在地表浅层长距离开挖埋设巨型管道的方案往往难以实施。国外的排水管网建设经验表明,排水深隧是较好的替代方案,国内在该方面的研究和应用才刚刚起步。旨在解决排涝问题、控制面源污染、将武昌地区的几个污水厂从中心城区外迁集中处理,武汉市规划在汉口和武昌地区分别建设一条排水深隧。鉴于该深隧工程相对于一般市政设施而言有其特殊性且具有地区特性,有必要对武汉深隧项目进行环境影响分析,并通过模拟对深隧工程的排涝及控污效能进行定量分析。本论文主要进行了下列几个方面的研究工作:(1)结合武汉市深隧工程的特点,对其在施工及运行期间产生的废水、废气、噪声、固体废物等污染源的成因以及深隧对地面建筑物、水土流失、社会环境可能产生的危害进行预测分析,并提出了相应的环保措施。(2)对武昌地区内涝较为严重的罗家港片区的排水系统及其深隧进行了SWMM模型概化,并对模型参数、雨型参数进行了属地化。模拟结果表明:对规划的浅层系统而言,罗家港片区可应对P=5a不同降雨历时及P=10a短降雨历时(T=60min)的暴雨不至于产生严重内涝;对规划的浅层系统进一步改造后,罗家港片区内涝程度有所改善,但仍难应对P=10a长降雨历时(T=180min)的暴雨;在改造规划浅层系统的基础上增设深隧后,可抵御P=30a短降雨历时暴雨(T=60、120min),但对应长降雨历时的暴雨,该地区仍有数个渍水点。(3)对罗家港片区SWMM模型中的水质参数进行了确定,将污水深隧的两个入流竖井视作合流制系统溢流污水截留井,模拟得到了不同截流倍数时合流区的截污比及污染物去除比,得到了该地区的最佳截流倍数为3.0。(4)对汉口深隧及其服务的浅层排水系统及其深隧进行了SWMM模型概化,并对模型参数、雨型参数进行了属地化;假定深隧采用等管径,对不同重现期、不同降雨历时条件下的渍水情况进行模拟分析,对比分析不同深隧直径时的渍水总量、渍水量分别大于5000m3和10000m3的渍水点数、渍水时长分别大于0.5h和1h的渍水点数,结果表明对汉口地区而言,在现有浅层系统条件下,最优深隧直径为8m。本文对武汉深隧工程进行了环境影响分析,提出了基于SWMM的防涝效能分析、面源控制截流倍数优选、深隧直径优化的方法,针对武汉深隧工程所取得的研究结论对其工程设计具有借鉴作用。
[Abstract]:When the surface coverage of urban areas has basically been finalized, the underground space of urban roads has been occupied by a variety of pipelines, such as planning to further increase the drainage capacity of urban areas or to relocate decentralized sewage treatment plants out of the city. It is difficult to implement the scheme of laying giant pipeline in shallow long distance excavation. Foreign experience of drainage pipe network construction shows that deep tunnel drainage is a better alternative, and the domestic research and application in this field has just started. In order to solve the problem of waterlogging and control non-point source pollution, several sewage plants in Wuchang area were transferred from the central urban area to centralized treatment. Wuhan city plans to build a drainage tunnel in Hankou and Wuchang area respectively. In view of the particularity and regional characteristics of the deep tunnel project compared with the general municipal facilities, it is necessary to carry out environmental impact analysis on Wuhan deep tunnel project and to quantitatively analyze the drainage and pollution control efficiency of the deep tunnel project through simulation. This paper mainly carries on the following several aspects of research work: 1) combined with the characteristics of Wuhan deep tunnel project, the causes of pollution sources such as waste water, exhaust gas, noise, solid waste produced during construction and operation, as well as the deep tunnel to ground buildings, are analyzed. The potential hazards of soil erosion and social environment are forecasted and analyzed, and the corresponding environmental protection measures are put forward. The drainage system and its deep tunnel in Luojiagang area, where the waterlogging is more serious in Wuchang area, are generalized by SWMM model, and the model parameters are also given. The rain-type parameters were localized. The simulation results show that, for the planned shallow layer system, the Luojiagang area can cope with the heavy rain with different rainfall duration of 5 years and short rainfall duration of 10 years with 60 mins. The degree of waterlogging in Luojiagang area has been improved, but it is still difficult to cope with the heavy rain of 10 years long rainfall duration and 180 min. After adding deep tunnel on the basis of reconstruction and planning of shallow layer system, it can resist the heavy rain with short rainfall duration of 30 years (TX 60120 mins), but it corresponds to the rainstorm with long rainfall duration. The water quality parameters in SWMM model of Luojiagang area are determined by several waterlogging points in this area. The two inflow shafts in the sewage deep tunnel are regarded as overflow sewage interception wells in the combined flow system. The pollution interception ratio and pollutant removal ratio in the confluence area are obtained by simulation. The optimal closure ratio is 3.0.40) the SWMM model of Hankou deep tunnel and its service shallow drainage system and its deep tunnel are generalized by SWMM model. The model parameters and rain type parameters are localized, and the waterlogging conditions under different recurrence periods and different rainfall duration are simulated and analyzed, and the total waterlogging under different tunnel diameters is compared and analyzed, assuming that the tunnel adopts equal pipe diameter, and the waterlogging conditions under different recurrence periods and different rainfall duration are simulated and analyzed. The waterlogging water quantity is larger than the waterlogging points of 5000m3 and 10000m3, and the waterlogging duration is more than 0.5h and 1h, respectively. The results show that the optimum depth tunnel diameter is 8m under the existing shallow system conditions in Hankou area. In this paper, the environmental impact analysis of Wuhan deep tunnel project is carried out, and the method of waterlogging effectiveness analysis based on SWMM, the optimal selection of non-point source control flow closure multiple, and the optimization of deep tunnel diameter are put forward. The conclusions obtained from Wuhan Deep Tunnel Project can be used for reference in the design of Wuhan Deep Tunnel Project.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X820.3;TU992

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