本文選題：路面 + 產(chǎn)匯流�。� 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：近年來,隨著我國公路建設(shè)的高速發(fā)展,尤其是多山地區(qū)農(nóng)村公路的不斷發(fā)展,公路的積水破壞問題也日益增多。路面水流的侵蝕破壞是導(dǎo)致公路破壞的重要因素之一,因此研究路面產(chǎn)匯流的影響因素和變化規(guī)律對于路面養(yǎng)護和排水能起到重要的指導(dǎo)意義。目前現(xiàn)有的學(xué)術(shù)成果對路面微流域的研究還不夠深入。因此本文采用現(xiàn)場水動力學(xué)及模擬降雨試驗和數(shù)值模擬分析相結(jié)合的方法,深入地研究路面微流域產(chǎn)匯流的影響因素和變化規(guī)律。本論文取得的主要研究成果如下:一、由現(xiàn)場路面水動力學(xué)沖刷試驗結(jié)合數(shù)據(jù)進行模擬分析得到以下結(jié)論:(1)路面流平均流速、水深和雷諾數(shù)主要受到流量影響,路面粗糙度和坡度對平均流速和水深影響較小,對雷諾數(shù)沒有影響。(2)阻力系數(shù)與路面粗糙度、坡度和弗勞德數(shù)呈良好冪函數(shù)關(guān)系。由數(shù)據(jù)擬合所得到的計算模型在試驗條件下可以用于計算不同路面粗糙度條件下的路面薄層水流的阻力系數(shù)。(3)降雨的打擊作用對路面流的平均流速和弗勞德數(shù)有放大效應(yīng),對阻力系數(shù)有減小效應(yīng),平均水深和流態(tài)則沒有影響。二、由現(xiàn)場路面模擬降雨試驗結(jié)合數(shù)據(jù)進行模擬分析得到以下結(jié)論:(1)路面產(chǎn)匯流主要受到路面粗糙度、坡度、降雨時間和降雨強度的影響。路面降雨產(chǎn)流時間主要受到路面粗糙度、降雨強度的影響,臨界產(chǎn)流量則只受到路面粗糙度的影響:匯流時間和洪峰時間主要受到降雨強度的影響,路面粗糙度次之,坡度對兩者的影響最小;匯流量洪峰值主要受到降雨強度的影響,路面粗糙度和坡度對其的影響較小。(2)對通過數(shù)據(jù)擬合得到的產(chǎn)匯流計算模型進行效率系數(shù)檢驗,得出在試驗條件下,路面微流域的產(chǎn)匯流計算模型可以用于計算降雨條件下路面的產(chǎn)匯流時間和洪峰流量值,并且模擬效果較好。
[Abstract]:In recent years, with the rapid development of highway construction in China, especially the continuous development of rural highways in mountainous areas, the problem of waterlogging and destruction of highways is increasing day by day. The erosion and damage of pavement water flow is one of the important factors leading to the road damage. Therefore, the study of the influencing factors and changing rules of road surface production and confluence plays an important guiding role in pavement maintenance and drainage. At present, the existing academic achievements are not deep enough for the research of pavement micro-watershed. In this paper, field hydrodynamics, rainfall simulation test and numerical simulation analysis are used to study the influence factors and variation law of runoff generation and confluence in pavement micro-watershed. The main research results obtained in this paper are as follows: first, the average flow velocity, water depth and Reynolds number of pavement flow are mainly affected by the flow rate from the field hydrodynamic scour test combined with the simulation analysis of the data obtained from the following conclusions: 1) the average flow velocity, the water depth and the Reynolds number are mainly affected by the flow rate. The road roughness and slope have little influence on average velocity and water depth, but no effect on Reynolds number.) the resistance coefficient has a good power function relationship with road roughness, slope and Froude number. The calculated model obtained from the data fitting can be used to calculate the resistance coefficient of the thin layer flow under different pavement roughness conditions under the experimental conditions. The impact of rainfall on the average velocity and Froude number of the pavement flow has a magnifying effect. There is a decreasing effect on drag coefficient, but no effect on average water depth and flow state. Secondly, the following conclusions can be drawn from the field road surface simulation rainfall test combined with the data. The following conclusions are drawn: the road surface yield and confluence are mainly affected by the road roughness, slope, rainfall time and rainfall intensity. Pavement runoff time is mainly affected by road roughness and rainfall intensity, critical runoff is affected only by road roughness: the confluence time and Hong Feng time are mainly affected by rainfall intensity, and pavement roughness is the second. The effect of slope on both is the least, the peak value of runoff is mainly affected by rainfall intensity, and the influence of road roughness and slope on it is small. (2) the efficiency coefficient of the model of runoff yield and confluence obtained by data fitting is tested. It is concluded that under the experimental conditions, the model of runoff generation and confluence of pavement micro-watershed can be used to calculate the time of producing and confluence of road surface and the value of Hong Feng flow under the condition of rainfall, and the simulation results are good.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U418.6

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