Method for establishing simplified hydraulic model of urban downward-concave overpass area under different rainstorm situations

Abstract

The invention belongs to the technical field of municipal engineering, and discloses a method for establishing a simplified hydraulic model of an urban downward-concave overpass area under different rainstorm situations. The method comprises the steps that the catchment range of a high-catchment area and a low-catchment area of the urban downward-concave overpass area and a high-precision DEM are determined to serve as earth surface elevation input conditions of the model; the input of a model pipe network is simplified through the rainfall loss form; the waterlogging disaster situation in the urban downward-concave overpass area under the different rainstorm situations is simulated through the computer hydraulic model; an improvement implement scheme is determined according to a model calculation result. The method for establishing the simplified hydraulic model of the urban downward-concave overpass area under the different rainstorm situations is stated, the waterlogging disaster situation in the urban downward-concave overpass area under the different rainstorm situations can be simulated, and a current overpass area designing scheme can be assessed. According to the method, it makes possible that the reason for ponding of a downward-concave overpass is analyzed through the hydraulic model, and a theoretical basis is provided for improving and planning the downward-concave overpass.

Description

technical field [0001] The invention relates to a method for constructing a simplified hydraulic model of an urban concave overpass area under different rainstorm scenarios, and belongs to the technical field of municipal engineering. Background technique [0002] In order to solve the frequent occurrence of urban waterlogging disasters, the causes of waterlogging disasters in different urban planning areas should be scientifically analyzed. Severe waterlogging in the urban sunken overpass area under heavy rainfall can lead to traffic jams or even paralysis. Due to the importance of the geographical location of the urban sunken overpass and the particularity of its drainage facilities, it must be resolved from the planning and design stage. Develop solutions to urban waterlogging problems. In order to scientifically analyze the causes of waterlogging disasters in urban sunken overpass areas, it is necessary to construct waterlogging models in urban sunken overpass areas und...

AI Technical Summary

Problems solved by technology

The study found that under low return period rainstorm conditions in the urban concave overpass catchment area, the rainstorm runoff from the low catchment area generally enters the drainage pumping station, while under the high return period rainstorm condition, it is generally the low catchment area plus some The storm runoff in the high area enters the drainage pumping station, so the construction of the waterlogging model in the urban concave overpass area has certain complexity

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