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1 设计特点南水北调中线总干渠与沿线众多灌区的渠道交叉,为尽量减少工程建设对现有灌区灌溉供水效益的影响,需要修建总干渠与现有灌溉渠道交叉工程,工程分为倒虹吸、渡槽及涵洞几种类型。沙河南至漳河南段渡槽38座,由于渡槽数量较多,规模小,所以采用典型设计方法设计,按灌区渠道设计流量从0.8～13.1 m~3/s分3个流量段,每个流量段中选定一座有代表
1 Design Features The main canal of the Middle Route of South-to-North Water Diversion project intersects with the irrigation channels along many irrigation districts. In order to minimize the impact of the project construction on the irrigation and water supply benefits of the existing irrigation districts, it is necessary to construct a cross-channel project between the main channel and the existing irrigation channels. The project is divided into inverted siphon, Several types of culverts. Due to the large number of aqueducts and small scale, a typical design method is adopted. According to the canal design flow of irrigation area, the flow rate is from 0.8 to 13.1 m 3 / s and divided into 3 flow sections. Each flow section A selected representative