南水北调中线工程隧洞水力设计及水流特性研究

中线总干渠属宽浅式渠道，流量大水深浅．隧洞设计时既要考虑水流条件，又要顾及结构受力的合理性，使隧洞断面的高宽比应控制在1．0～1．5之间，从渠道到隧洞断面型式需要由宽浅式变为窄深式．为此，扼要介绍了这些隧洞的有关设计要点．

Research on hydraulic design and flow characteristics of the tunnels: Mid-route of South-to-North Water Transfer Project

The main channel for the Mid-route of South-to-North Water Transfer Project is to be a wide-shallow channel with large discharge and shallow water depth. The design of tunnels in the route need to consider not only the flow conditions but also the rationality of stressing conditions of the structures concerned, for which the ratios between height and width of the tunnel profiles have to be controlled between 1.0~1.5, and then the types of tunnel profiles are to be designed with a transition form from wide-shallow to narrow-deep. Therefore, the key points in the design of the tunnels are briefly introduced herein.