УДОСКОНАЛЕНИЙ МЕТОД РОЗРАХУНКУ ДЕФОРМАЦІЙ НА ЗАПЛАВАХ В ЗОНІ ВПЛИВУ МОСТОВОГО ПЕРЕХОДУ
Abstract
Deformations from high flooding can reach critical proportions, resulting in bridge failures. Accordingly, an improved method for calculating erosion in floodplains in the area affected by the bridge transition has been presented. The mathematical model for the floodplain dependent flow is obtained, based on the assumption of the small particles, the low acceleration of the flow relative to the acceleration of gravity, the general equation for the transport of the heterogeneous flow, and the nonsymmetry equation. The model form of the equations takes into account the constituent forces of resistance of vegetation in the flow and resistance of removal of soil grains during the process of erosion, and initial and boundary conditions for their realization are formed. A sequence for calculating the hydrodynamic characteristics of the flood flux in the area of the bridge transition influence is provided for determining the deformation values on the flood plains. The results of the calculation of the erosion in the underside floodplains of the plain river are presented.
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