Abstract: Based on the sinking simulation test for No. 2 floating cofferdam of Wuhan Tianxingzhou Rail-Cum-Road Bridge, the flow velocity, turbulence intensity and local scour around the floating cofferdam at different sinking phases are analyzed. According to the flow and riverbed conditions during the sinking process ot the tloating cofferdam, the local scour depth is predicted, and the predicted results are in good agreement with the field data. test