南水北调济南市区段输水暗涵水力计算与模型验证

The Hydraulic Calculation and Model Validation of the Covered Culverts for Water Delivery in ＂ J~ nan Section of the South-to-North Water Transfer Project

南水北调穿越济南市区段采用无压暗涵输水，设计中采用明渠均匀流理论进行水力计算。由于暗涵边界条件复杂，局部断面发生变化，且存在多处弯道，为了验证均匀流计算方法的合理性，分别采用水工模型和非均匀流理论等方法进行验证。通过对输水暗涵几个具有代表性节点的分析，说明长距离无压暗涵输水，在局部断面发生变化的条件下，全线采用明渠均匀流理论进行水力计算是合理、安全的。

It takes the free flow covered culverts for water delivery in the Jinan urban section of the South-to-North Water Transfer Project and the design dues to the result of hydraulic calculation according to the uniform flow in open channels. Because of the complex boundary condition of the covered culverts, variation of the cross sections, and the channel bends, it validated the model by the hydraulic model and non-uniform flow to verify the reasonability of the calculation with the uniform flow. It analyzed the data in several key nodes and concluded that the hydraulic cal- culation using the free uniform flow is reasonable and safe in the covered culverts water distribution without pressure in long distance.