基于SWMM和Infoworks CS的南湖路高排管涵改造工程水力模擬研究
發(fā)布時(shí)間：2019-06-11 12:24
【摘要】：長(zhǎng)沙市南湖路位于長(zhǎng)沙市雨花區(qū)，其道路下所埋設(shè)的高排管涵是該區(qū)主要的排水干管，主要收集南湖路以南，南郊公園片區(qū)的高區(qū)雨污水。現(xiàn)狀為4x3箱涵沿書(shū)院路和水廠(chǎng)路敷設(shè)，出江口涵底標(biāo)高為25.01米。在書(shū)院路和南湖路上有3個(gè)現(xiàn)狀溢流井，井底標(biāo)高為34.27米、34.2米、32.89米。但是隨著湘江庫(kù)區(qū)蓄水后，該高排管涵的出江口常水位高標(biāo)變?yōu)?9.81米和29.84米。原有的自由出流高排管涵系統(tǒng)由于涵底標(biāo)高低于蓄水后的常水位，排水方式由自由出流變?yōu)檠蜎](méi)出流，片區(qū)降雨較大時(shí)，，高排管涵內(nèi)形成雍水上的雨水有溢出地面的可能。該片區(qū)又主要為人口密集區(qū)和重要地區(qū)，如果不對(duì)原有排水系統(tǒng)存在的問(wèn)題進(jìn)行改造，會(huì)造成較大的經(jīng)濟(jì)損失。 考慮到管網(wǎng)水力條件的特殊性和工程的特殊要求，為了給管網(wǎng)改造設(shè)計(jì)提供一定的技術(shù)決策依據(jù)和技術(shù)平臺(tái)支撐，文章結(jié)合國(guó)內(nèi)外工程實(shí)踐經(jīng)驗(yàn)和先例，利用計(jì)算機(jī)模型對(duì)南湖路高排管涵系統(tǒng)進(jìn)行評(píng)估。采用InfoWorks CS和SWMM模型評(píng)估該管涵的改造前后不同條件下的出水情況。 在模型的選擇方面，由于InfoWorks CS采用的水力模擬內(nèi)核主要采用靜態(tài)穩(wěn)定流內(nèi)核，對(duì)于單一排水管網(wǎng)出口的模擬能夠較好貼合工程實(shí)際計(jì)算值。而SWMM軟件中的動(dòng)力波動(dòng)流及雨量計(jì)功能則被利用來(lái)評(píng)估改造后的管涵系統(tǒng)出流情況。通過(guò)利用兩種不同模型的模擬優(yōu)勢(shì)，能夠更為準(zhǔn)確地得到貼近工程實(shí)際的模擬結(jié)果，為管涵的改造設(shè)計(jì)提供技術(shù)支撐依據(jù)。文章在利用SWMM模擬的同時(shí)對(duì)長(zhǎng)沙市降雨過(guò)程線(xiàn)進(jìn)行了預(yù)模擬，模擬對(duì)比結(jié)果顯示利用SWMM校正之后的雨量計(jì)數(shù)值優(yōu)于InfoWorks CS在暴雨強(qiáng)度的雨量模擬結(jié)果。 研究表明，在湘江水位抬升以后，未改造之前的排水系統(tǒng)不能支持城市正常的雨水排放要求。根據(jù)InfoWorks CS的模擬結(jié)果，可以看出南湖路段大概5-7個(gè)檢查井會(huì)超出排水負(fù)荷造成外溢。通過(guò)對(duì)原有排水系統(tǒng)進(jìn)行改造設(shè)計(jì)，能夠有效增加雨水管網(wǎng)的輸水能力，也能夠減少原有主管段的輸水負(fù)荷。但因?yàn)樗惶Ц咭材軌蛟斐晒艿纼?nèi)的旱時(shí)污水沉積物沉降堆積，造成管網(wǎng)堵塞，在后續(xù)工程實(shí)際中應(yīng)加強(qiáng)排淤能力。
[Abstract]:Nanhu Road in Changsha City is located in Yuhua District of Changsha City. The high discharge pipe culvert buried under the road is the main drainage pipe in this area, which mainly collects rain sewage from the high area south of Nanhu Road and the park area of the southern suburbs. The present situation is that the 4x3 box culvert is laid along the Academy Road and Waterworks Road, and the elevation of the bottom of the culvert at the mouth of the Yangtze River is 25.01 meters. There are three overflow wells on Shuyuan Road and Nanhu Road, with bottom hole elevation of 34.27 meters, 34.2 meters and 32.89 meters. However, with the impoundment of Xiangjiang River reservoir area, the constant water level of the high discharge culvert becomes 29.81 meters and 29.84 meters. Because the elevation of the bottom of the culvert is lower than the constant water level after impoundment, the drainage mode of the original free discharge pipe culvert system changes from free outflow to inundation. When the rainfall is heavy in the area, Rain Water, who forms Yongshui in the high drainage culvert, may overflow the ground. This area is mainly populated area and important area, if the problems existing in the original drainage system are not reformed, it will cause great economic losses. Considering the particularity of hydraulic conditions of pipe network and the special requirements of engineering, in order to provide certain technical decision-making basis and technical platform support for pipe network reconstruction design, this paper combines the practical experience and precedent of engineering at home and abroad. The computer model is used to evaluate the high row pipe culvert system of Nanhu Road. InfoWorks CS and SWMM models were used to evaluate the effluent under different conditions before and after the revamping of the pipe culvert. In the aspect of model selection, because the hydraulic simulation kernel adopted by InfoWorks CS mainly adopts static steady flow kernel, the simulation of single drainage pipe network outlet can better fit the actual calculation value of the project. The dynamic fluctuating flow and rainfall gauge function in SWMM software are used to evaluate the flow out of the modified pipe culvert system. By using the simulation advantages of two different models, the simulation results close to the engineering practice can be obtained more accurately, which provides the technical support basis for the transformation design of pipe culvert. In this paper, the rainfall process line of Changsha City is pre-simulated by SWMM simulation. The simulation results show that the rainfall count value corrected by SWMM is better than that of InfoWorks CS rainfall simulation results in rainstorm intensity. The results show that after the water level of Xiangjiang River rises, the drainage system before transformation can not support the normal discharge requirements of Rain Water in the city. According to the simulation results of InfoWorks CS, it can be seen that about 5 wells in Nanhu section will overrun the drainage load and cause overflows. Through the transformation and design of the original drainage system, the water transportation capacity of Rain Water pipe network can be effectively increased, and the water transportation load of the original main section can also be reduced. However, because the water level rise can also cause the deposition and accumulation of sewage sediment in the pipeline during drought, resulting in blockage of the pipe network, the capacity of silting should be strengthened in the practice of subsequent projects.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU992.22
本文編號(hào)：2497186
[Abstract]:Nanhu Road in Changsha City is located in Yuhua District of Changsha City. The high discharge pipe culvert buried under the road is the main drainage pipe in this area, which mainly collects rain sewage from the high area south of Nanhu Road and the park area of the southern suburbs. The present situation is that the 4x3 box culvert is laid along the Academy Road and Waterworks Road, and the elevation of the bottom of the culvert at the mouth of the Yangtze River is 25.01 meters. There are three overflow wells on Shuyuan Road and Nanhu Road, with bottom hole elevation of 34.27 meters, 34.2 meters and 32.89 meters. However, with the impoundment of Xiangjiang River reservoir area, the constant water level of the high discharge culvert becomes 29.81 meters and 29.84 meters. Because the elevation of the bottom of the culvert is lower than the constant water level after impoundment, the drainage mode of the original free discharge pipe culvert system changes from free outflow to inundation. When the rainfall is heavy in the area, Rain Water, who forms Yongshui in the high drainage culvert, may overflow the ground. This area is mainly populated area and important area, if the problems existing in the original drainage system are not reformed, it will cause great economic losses. Considering the particularity of hydraulic conditions of pipe network and the special requirements of engineering, in order to provide certain technical decision-making basis and technical platform support for pipe network reconstruction design, this paper combines the practical experience and precedent of engineering at home and abroad. The computer model is used to evaluate the high row pipe culvert system of Nanhu Road. InfoWorks CS and SWMM models were used to evaluate the effluent under different conditions before and after the revamping of the pipe culvert. In the aspect of model selection, because the hydraulic simulation kernel adopted by InfoWorks CS mainly adopts static steady flow kernel, the simulation of single drainage pipe network outlet can better fit the actual calculation value of the project. The dynamic fluctuating flow and rainfall gauge function in SWMM software are used to evaluate the flow out of the modified pipe culvert system. By using the simulation advantages of two different models, the simulation results close to the engineering practice can be obtained more accurately, which provides the technical support basis for the transformation design of pipe culvert. In this paper, the rainfall process line of Changsha City is pre-simulated by SWMM simulation. The simulation results show that the rainfall count value corrected by SWMM is better than that of InfoWorks CS rainfall simulation results in rainstorm intensity. The results show that after the water level of Xiangjiang River rises, the drainage system before transformation can not support the normal discharge requirements of Rain Water in the city. According to the simulation results of InfoWorks CS, it can be seen that about 5 wells in Nanhu section will overrun the drainage load and cause overflows. Through the transformation and design of the original drainage system, the water transportation capacity of Rain Water pipe network can be effectively increased, and the water transportation load of the original main section can also be reduced. However, because the water level rise can also cause the deposition and accumulation of sewage sediment in the pipeline during drought, resulting in blockage of the pipe network, the capacity of silting should be strengthened in the practice of subsequent projects.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU992.22
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