Abstract
Tunnel project across Yangtze River about Line NO. 8 of track traffic located at 450m in upper the second bridge of Wuhan reach. Change of velocity, hydrodynamic axis, diversion ratio of inlet about river reach of project under the different conditions of hydrology were studied through experiment of river engineering model, and the minimal buried depth of the top of tunnel about deep trough is about 7.5 m while the maximal scour depth of section about site of tunnel based on variation of deposition or erosion of riverbed, the possible lowest altitude of eroding, change of swing range of thalweg about river reach of tunnel project, and building of tunnel has no effect on river regime, flood control and shipping for river reach of project. The results can be applicable as a reference for design of project.Key words: tunnel across river; river engineering model; river regime; flood control; altitude of deepest location
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