Author(s): Peng Liu; Yan Wang; Hongwei Liu

Linked Author(s):

Keywords: Underground space; Floods; Index system; Escape time; Capacity-depth-disaster curve; Disasters

Abstract: Due to the rapid development of urban underground spaces and the frequent occurrence of extreme heavy rainfall events, underground spaces are often vulnerable to flooding. Flood prevention is an urgent issue that needs to be taken seriously and must be addressed in underground space development. Based on the geographical information characteristics, flood characteristics, and disaster characteristics of different underground spaces, an underground space flood indicator system was constructed in this study. Most of the morphological indexes can be obtained from plane maps, design maps, planning maps, satellite images, current standard specifications, or field measurements, while the calculation indexes were mainly simulated using hydrodynamic methods and derived from empirical formulas. Taking the safe evacuation water depth at the surface exit of the underground space as the control condition, the safe evacuation time for a specific underground space was derived, and a method for drawing the capacity-depth-disaster curve of the underground space was proposed. This provides a data basis for generalizing and abstracting a representative underground space model, studying the response mechanism of underground space volume to flooding and waterlogging, and understanding the invasion mechanisms and patterns of urban underground space floods.

DOI: https://doi.org/10.64697/978-90-835589-7-4_41WC-P1795-cd

Year: 2025