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1概况沁河渠道倒虹吸工程位于河南省温县徐堡镇北、博温公路沁河大桥下游约300m处,是南水北调总干渠与沁河的交叉建筑物。沁河是黄河北岸主要支流之一,总干渠在河南省温县白马沟村以沁河相交,交叉断面以上流域面积12870km~2。100年一遇洪峰流量4000m~3/s,300年一遇天然洪峰流量7690m~3/s。沁河渠道倒虹吸工程由进口渐变段、进口检修闸、倒虹吸管身段、出口控制闸和出口渐变段等组成。建筑物总长1197m,其中管身水平投影长1015m。倒虹吸设计流量265m~3/s,加大流量320m~3/s,设计水头0．63m。倒虹吸管身横向为3孔箱形钢筋混凝土结构,单孔孔径6．9m×6．9m(宽×高)。
1 Overview Qin River channel inverted siphon project is located in Xu County, Henan Province, Xu Bei, north of the Beibu Highway Qinhe River Bridge about 300m downstream, is the South-North Main Canal and Qinhe cross buildings. Qinhe is one of the main tributaries of the Yellow River north bank, the main trunk in Wen County, Henan Province Baimagou village to meet the Qinhe River, the cross-section above the basin area of 12870km ~ 2. 100 peak floods in 4000m ~ 3 / s, 300 years of a case Natural peak flow 7690m ~ 3 / s. Qin River channel inverted siphon project from the entrance section of the gradient, the import gate repair, inverted siphon figure, the export control gate and the exit of the transition section and other components. The total length of the building is 1197m, of which the horizontal projection of the tube body is 1015m long. Inverted siphon design flow 265m ~ 3 / s, increased flow 320m ~ 3 / s, head design 0.63m. Inverted siphon body horizontal 3-hole box-shaped reinforced concrete structure, single hole diameter 6.9m × 6.9m (width × height).