本文選題：積水區(qū) + 溢流量��； 參考：《天津大學》2015年碩士論文

【摘要】：城市排水管網(wǎng)系統(tǒng)是城市的重要基礎設施。隨著城市不透水表面增加和極端降雨的頻繁發(fā)生,降雨徑流量增多,發(fā)生內(nèi)澇的風險增大。城市內(nèi)澇給我國帶來了極大損失,本文選題研究城市雨水徑流和城市內(nèi)澇問題,具有重要的理論和應用價值。本文在總結國內(nèi)外研究現(xiàn)狀的基礎上,建立了雨水徑流、排水管網(wǎng)、河道和泵站模擬模型,研究了不同降雨強度和歷時下,地表溢流與排水管網(wǎng)、河道水位和泵站間的相互影響,并針對區(qū)域存在問題,提出了適合當?shù)氐牡陀绊戦_發(fā)措施。主要得到了以下結論:(1)重現(xiàn)期為1 a時三個研究區(qū)域基本不積水或有零星積水,說明排水管網(wǎng)與一年一遇的設計標準基本相符。(2)相同降雨歷時下,隨著重現(xiàn)期的增大,老城區(qū)(區(qū)域1)的積水面積和積水深度顯著增大。重現(xiàn)期為2 a時,有兩處最大積水深度超過0.50 m。重現(xiàn)期增大到5 a及其以上時,有多處出現(xiàn)明顯積水,且積水時間都在1 h以上。重現(xiàn)期為50 a時,最大積水深度接近1.0 m,對公共安全的危害嚴重。(3)新城區(qū)(區(qū)域2和3)處于城市開發(fā)階段,徑流系數(shù)較小。重現(xiàn)期為2a時,兩個區(qū)域積水面積較小,積水最大深度分別為0.15 m和0.03 m。重現(xiàn)期增大到10 a時,兩個區(qū)域開始有較大的積水面積。當重現(xiàn)期繼續(xù)增大到50 a時,兩個研究區(qū)域的最大積水深度分別為0.30 m和0.14 m,遠小于區(qū)域1的最大積水深度。(4)針對區(qū)域1、2和3開展LID措施(綠色屋頂、滲透鋪裝、下凹式綠地),溢流消減率分別為12%~52%、10%~100%和28%~57%。(5)管網(wǎng)的溢流量受河道初始水位影響強烈。在水泵流量較小時,水泵開啟水位對管網(wǎng)溢流量影響較小,但是降雨前利用水泵降低河道水位對于管網(wǎng)排水能力有很大提升。
[Abstract]:Urban drainage pipe network system is an important infrastructure of the city. With the increase of impervious surface and the frequent occurrence of extreme rainfall, the rainfall runoff increases and the risk of waterlogging increases. Urban waterlogging has brought great losses to our country. The study of urban Rain Water runoff and urban waterlogging has important theoretical and practical value. On the basis of summing up the present research situation at home and abroad, the simulation model of Rain Water runoff, drainage pipe network, river channel and pumping station is established, and the surface overflow and drainage pipe network are studied under different rainfall intensity and duration. The interaction between river water level and pumping station, and the local low impact development measures are put forward in view of the problems existing in the region. The main conclusions are as follows: (1) when the recurrence period is 1 a, there is basically no water accumulation or sporadic water accumulation in the three study areas, which indicates that the drainage pipe network basically accords with the design standard of once a year, and under the same rainfall duration, with the increase of the recurrence period, The area and depth of water in old urban area (area 1) increased significantly. When the recurrence period was 2 years, the maximum depth of hydrops was more than 0.50 m. When the recurrence period increased to 5 years or more, there were obvious hydrops in many places, and the time of hydrops was more than 1 h. When the recurrence period is 50 years, the maximum depth of water accumulation is close to 1.0 m, and the harm to public safety is serious. 3) the new urban area (region 2 and 3) is in the stage of urban development, and the runoff coefficient is relatively small. When the recurrence period is 2a, the area of hydrops in the two regions is smaller, the maximum depth of hydrops is 0.15 m and 0.03 m, respectively. When the recurrence period increased to 10 a, the two regions began to have a large area of stagnant water. When the recurrence period continues to increase to 50 years, the maximum depth of water in the two study areas is 0.30 m and 0.14 m respectively, which is much smaller than the maximum depth of water in area 1. The LID measures (green roof, permeable pavement) are carried out for area 1 / 2 and 3, respectively. The overflow reduction rate of the concave greenbelt is 12 / 522 / 10100% and 28 / 57 / 5 respectively) the overflow discharge of the pipe network is strongly affected by the initial water level of the river. When the pump flow is small, the water level of pump opening has little influence on the discharge of pipe network, but using water pump to reduce the water level of river before rainfall can greatly improve the drainage capacity of the pipe network.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU992

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