南水北调中线京石河北段大流量低水头渡槽的水力计算

Water Calculation of Large Flow and Low Water Head Aqueduct in Hebei Segment of Beijing-Shijiazhuang in the Middle Line Project of South-to-North Water Transfer

大流量低水头渡槽根据设计流量和给定水头确定过水断面后,通过加大流量时,渡槽内发生非均匀流,工程设计人员需对这种水流情况进行推算,以确定渡槽在通过加大流量时的水面线,由此计算渡槽侧墙高度和结构荷载,确保渡槽的安全。

After water cross-section determined in large flow and low water head aqueduct by designed flow and given water heads. When the flow increased, there is non-uniform flow happened in aqueduct. The designers should calculate this flow situation to determine the water surface line under the situation, to calculate wall height to protect the safety of aqueduct.