發(fā)布時(shí)間：2018-12-27 12:12

【摘要】：將地面集水過(guò)程分為片流、淺水集中流、明渠流和雨水調(diào)蓄池內(nèi)停留4種狀態(tài),分別使用曼寧動(dòng)力學(xué)方法、USDA方法、曼寧公式法和均勻流計(jì)算法進(jìn)行計(jì)算,提出了適合我國(guó)的計(jì)算理論和方法,并模擬研究我國(guó)6個(gè)主要城市的地面集水時(shí)間.結(jié)果表明:對(duì)于光滑地表,集水時(shí)間與集水距離成正比;對(duì)于粗糙地表,集水時(shí)間對(duì)集水距離的響應(yīng)為在片流和淺水集中流臨界處出現(xiàn)拐點(diǎn);相同坡度的光滑地表,不同城市的50 m和150 m集水時(shí)間差別較大;《室外排水設(shè)計(jì)規(guī)范》(GB 50014—2006,2014版)關(guān)于集水時(shí)間和集水距離的規(guī)定,在地面平坦且光滑的情況下(坡度S≤0.001)可以應(yīng)用,當(dāng)S0.001時(shí),則不安全;《室外排水設(shè)計(jì)規(guī)范》(GB 50014—2006,2014版)關(guān)于集水時(shí)間和集水距離的規(guī)定對(duì)于非光滑地表要慎重應(yīng)用;相同地表曼寧系數(shù)時(shí),坡度越大,對(duì)設(shè)計(jì)流量的相對(duì)影響越大;相同坡度時(shí),曼寧系數(shù)越大,對(duì)設(shè)計(jì)流量的相對(duì)影響越大.
[Abstract]:The surface water collecting process was divided into four states: sheet flow, shallow water concentration flow, open channel flow and Rain Water storage tank. The Manning kinetic method, USDA method, Manning formula method and uniform flow calculation method were used to calculate the process. The calculation theory and method suitable for our country are put forward, and the surface water harvesting time of six major cities in China is simulated. The results show that the catchment time is proportional to the catchment distance for the smooth surface, and for the rough surface, the response of the catchment time to the catchment distance is the inflection point at the critical point of the shallow-water concentrated flow. On the smooth surface of the same slope, the water catchment time of 50 m and 150 m in different cities is quite different. The Design Code for Outdoor drainage (GB 50014-200614 / 2014) provides for water harvesting time and distance, which can be applied when the ground is flat and smooth (slope S 鈮，

本文編號(hào)：2393042