Application of 2D Hydraulics Model on Bridge Sluice and Scour Calculation

This article takes ZhuLong River in Zibo City as an example, using MIKE 21 two-dimensional mathematical model to simulate the influence of the bridge of flood control. The method of local topography and local roughness correction is used to generalize the piers in engineering. This article simulates the flushing and scouring process of bridges under a flood of 100 years. The results show that the MIKE 21 numerical model can simulate the complex terrain better, and the relative deviation in the process of model validation are all less than 1%. The backwater height and scour depth of the bridge are all within a reasonable range. Therefore, for a bridge with important flood control tasks in complex terrain river, it is suggested to use mathematical model to calculate the backwater value, so as to get more reasonable calculation results, and provide the basis analysis and calculation for flood control impact assessment.