Author(s): Zhao Cai; Hongwei Liu; Shaozhi Chu

Linked Author(s):

Keywords: Computational Fluid Dynamics; Urban flooding; Three dimensional disaster bearing body

Abstract: Due to the complex three-dimensional underground spatial characteristics, the main disaster bearing bodies were urbanized underground areas after the flood disasters occur. However, previous flood simulation studies in urbanized areas have mainly focused on one-dimensional or two-dimensional research, which cannot truly reflect the changes in water level and water flow velocity in the underground disaster bearing body space after urban flood disasters occur. Therefore, this study used computational fluid dynamics simulation models to construct and simulate a generalized model and underground space model of the three-dimensional disaster bearing body space underground. The simulation results found that in a single-layer underground space, the high velocity area of water flow is concentrated near the water flow inlet of the underground space, and a reflux area will be formed over a large range of underground space. In a double-layer underground space, the high velocity area is mainly concentrated at the space inlet and the connection of the double-layer space. In the early stage of flood disasters, attention should be paid to the impact of the high velocity area of the underground space connection on pedestrians and important buildings in the middle stage of disasters. The research results provide important references for the disaster chain deduction after the occurrence of underground space floods, as well as disaster response such as personnel evacuation in underground spaces.

DOI: https://doi.org/10.64697/978-90-835589-7-4_41WC-P2039-cd

Year: 2025