發(fā)布時(shí)間：2018-05-24 05:55

  本文選題：城市雨水管網(wǎng) + 排洪河道　； 參考：《西南交通大學(xué)》2015年碩士論文

【摘要】：城市雨水排水系統(tǒng)是城市重要基礎(chǔ)設(shè)施之一,雨水系統(tǒng)的完善程度決定著城市生產(chǎn)、生活的正常運(yùn)轉(zhuǎn)水平。根據(jù)城市雨水排水系統(tǒng)的構(gòu)成,可將雨水排水系統(tǒng)分為兩級,一是城市雨水管道系統(tǒng),二是排洪河道。兩級排水系統(tǒng)之間相互連接,交互影響。排洪河道的水位及流量變化情況,直接或間接影響城市雨水管網(wǎng)的運(yùn)行狀況。因此,為全面系統(tǒng)地分析城市雨水管網(wǎng)系統(tǒng)的運(yùn)行狀況,識別可能出現(xiàn)內(nèi)澇的區(qū)域,進(jìn)而有針對性的擬定有效的防澇措施,應(yīng)將城市雨水管網(wǎng)與河網(wǎng)結(jié)合起來考慮,建立城市雨排系統(tǒng)耦合計(jì)算模型。本研究對此進(jìn)行了一定的嘗試,開展了如下主要工作：1.從城市雨水排水系統(tǒng)的角度出發(fā),分析了城市雨水管網(wǎng)系統(tǒng)與排洪河道之間的聯(lián)系特征,論述了兩級排水系統(tǒng)耦合分析的理論依據(jù)；從雨水徑流與排放過程入手,研究了內(nèi)澇產(chǎn)生的機(jī)理,并分析了相關(guān)防澇措施。2.通過雨水徑流過程的分析與研究,本文采用數(shù)學(xué)建模的手段建立了由輸入模型、水動(dòng)力模型及耦合模型三部分構(gòu)成的城市雨排系統(tǒng)耦合計(jì)算模型,并研究了各模型現(xiàn)行理論與計(jì)算方法在耦合計(jì)算模型中應(yīng)用的可行性及適用性。分析表明,降雨模型可選用芝加哥合成降雨過程線模擬降雨過程；產(chǎn)流模型可選用霍頓公式模擬入滲過程；匯流模型可選用等時(shí)流線法模擬匯流過程；其建模及計(jì)算工具可采用MIKE URBAN中的降雨徑流模塊。雨水管網(wǎng)水動(dòng)力模型可選用動(dòng)力波法模擬管網(wǎng)匯流過程,其建模及計(jì)算工具采用MIKE URBAN中的MOUSE引擎模塊；河網(wǎng)水動(dòng)力模型選用四點(diǎn)隱式差分理論模擬河網(wǎng)匯流過程,其建模及計(jì)算工具采用MIKE 11中的HD水動(dòng)力模塊。耦合模型依據(jù)管網(wǎng)模型理論,采用MIKE FLOOD作為模型耦合及計(jì)算工具,模擬雨水管網(wǎng)系統(tǒng)與河網(wǎng)系統(tǒng)的水動(dòng)力交換過程。3.本文以成都市某區(qū)域?yàn)槔?建立了該區(qū)域的城市雨排系統(tǒng)概化模型。根據(jù)室外排水設(shè)計(jì)規(guī)范中的相關(guān)規(guī)定,選用重現(xiàn)期為3年的非恒定降雨情景作為輸入條件。為簡化模型,提高運(yùn)算效率,本文在模型計(jì)算時(shí),依據(jù)雨水管網(wǎng)的管徑大小,將雨水管網(wǎng)系統(tǒng)分為兩級,進(jìn)行分級模擬計(jì)算。通過對該區(qū)域內(nèi)一級雨水管網(wǎng)與河網(wǎng)的水動(dòng)力耦合計(jì)算,可得到一、二級雨水管網(wǎng)系統(tǒng)連接點(diǎn)的水位及流量隨時(shí)間變化的情況,將其時(shí)間序列帶入二級雨水管網(wǎng)系統(tǒng)模型并作為其邊界條件,可精確計(jì)算出各節(jié)點(diǎn)的流量及水位變化情況；針對該研究條件下可能發(fā)生內(nèi)澇的區(qū)域,采用設(shè)置凹式綠地、建造調(diào)蓄池等防澇措施用以削減排水系統(tǒng)的峰值流量,并對此進(jìn)行了模擬分析,結(jié)果表明所采取的防澇措施是有效的。本論文所取得的研究成果為城市雨水排水系統(tǒng)及城市防澇系統(tǒng)分析提供了一種新的方法,具有一定的實(shí)際參考價(jià)值。
[Abstract]:Urban Rain Water drainage system is one of the most important infrastructure in the city. The perfection of Rain Water system determines the normal operation level of urban production and life. According to the composition of urban Rain Water drainage system, the Rain Water drainage system can be divided into two levels, one is the urban Rain Water pipeline system, the other is the flood discharge channel. The two-stage drainage systems are interconnected and interact with each other. The changes of water level and discharge of flood drainage channel directly or indirectly affect the operation of urban rainwater pipe network. Therefore, in order to comprehensively and systematically analyze the operation status of urban rainwater network system, identify the areas where waterlogging may occur, and then draw up effective waterlogging prevention measures, we should consider the combination of urban rainwater pipe network and river network. The coupling calculation model of urban rain drainage system is established. This research has carried on the certain attempt to this, has carried out the following main work: 1. From the point of view of urban Rain Water drainage system, this paper analyzes the relationship between urban rainwater pipe network system and flood discharge channel, discusses the theoretical basis for coupling analysis of two-stage drainage system, and starts with the process of Rain Water runoff and discharge. In this paper, the mechanism of waterlogging is studied, and the relative measures of waterlogging prevention are analyzed. Based on the analysis and research of Rain Water runoff process, the coupled calculation model of urban drainage system is established by mathematical modeling, which consists of three parts: input model, hydrodynamic model and coupling model. The feasibility and applicability of the current theories and calculation methods of each model in the coupled computing model are also studied. The analysis shows that Chicago synthetic rainfall process line can be used to simulate rainfall process in rainfall model, Horton formula can be used to simulate infiltration process in runoff model, isochronous streamline method can be used to simulate flow confluence process in confluence model. Its modeling and calculation tools can be used in MIKE URBAN rainfall runoff module. The hydrodynamic model of rainwater pipe network can be used to simulate the flow confluence process of pipeline network by using dynamic wave method, the modeling and calculation tools are MOUSE engine module in MIKE URBAN, and the four-point implicit difference theory is used in the hydrodynamic model of river network to simulate the flow confluence process of river network. The modeling and calculation tools are based on HD hydrodynamic module of MIKE 11. The coupling model is based on the pipe network model theory and MIKE FLOOD is used as the model coupling and calculation tool to simulate the hydrodynamic exchange process between the rainwater pipe network system and the river network system. Taking a region of Chengdu as an example, a generalized model of urban rain drainage system in this area is established in this paper. According to the relevant provisions of outdoor drainage design code, unsteady rainfall scenarios with a recurrence period of 3 years are selected as input conditions. In order to simplify the model and improve the operation efficiency, according to the pipe diameter of the rainwater pipe network, this paper divides the rainwater network system into two levels and carries on the hierarchical simulation calculation. Through the hydrodynamic coupling calculation of the first grade rainwater pipe network and the river network in this area, the variation of the water level and discharge of the connection point of the first and second grade rainwater pipe network system with time can be obtained. When the time series is brought into the two-stage rainwater network system model and taken as its boundary condition, the flow and water level changes of each node can be calculated accurately, and the concave green space can be set for the area where waterlogging may occur under this research condition. In order to reduce the peak discharge of drainage system, the flood prevention measures such as storage tank are constructed and simulated. The results show that the waterlogging prevention measures are effective. The research results in this paper provide a new method for the analysis of urban Rain Water drainage system and urban waterlogging prevention system, and have certain practical reference value.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU992.03

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