Simulation of Flood Routing Processes in Semi-Enclosed
Underground Spaces&nbsp;Based
on Smoothed Particle Hydrodynamics-Discrete Element Method

LIU Jiajie; XIONG Hao; CHEN Xiangsheng

doi:10.3973/j.issn.2096-4498.2025.S1.014

2025 , Vol. 45 >Issue S1: 125 - 135

DOI: https://doi.org/10.3973/j.issn.2096-4498.2025.S1.014

Simulation of Flood Routing Processes in Semi-Enclosed Underground Spaces Based on Smoothed Particle Hydrodynamics-Discrete Element Method

LIU Jiajie ,
XIONG Hao ,
CHEN Xiangsheng

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(1. Key Laboratory of Coastal Urban Resilient Infrastructures (MOE), Shenzhen 518060, Guangdong, China; 2. School of Civil and Traffic Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China; 3. Shenzhen Key Laboratory of Green and Efficient Intelligent Construction of Underground Metro Stations, Shenzhen 518060, Guangdong, China)

Online published: 2025-07-15

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Abstract

To explore the water flow diffusion process of floods in semi-enclosed underground spaces, a coupling method based on smoothed particle hydrodynamics (SPH) and discrete element method (DEM) is employed to simulate the dynamic process of flood invasion into underground bus stations. Then, a physical model experiment and numerical simulation are conducted to calibrate and validate the SPH-DEM coupling method, and the results demonstrate that the proposed method can effectively simulate the physical and mechanical processes of flood invasion into underground spaces. On this basis, the flood diffusion and evolution patterns in semi-enclosed underground space under two simulation conditions, floods from station hall and tunnel entrances, are examined, and the dynamic responses of various vehicles are analyzed. The research results indicate that: (1) In semi-enclosed underground spaces, private cars are subject to higher risks compared to buses. (2) Architectural environment around the vehicles significantly influences the evacuation and escape. (3) The specific location of the vehicles is a primary factor affecting the efficiency of evacuation and escape.

Key words： smoothed particle hydrodynamics and discrete element method coupling method; underground space; large-scale simulation; flood disaster; underground bus station

Cite this article

LIU Jiajie , XIONG Hao , CHEN Xiangsheng .

Simulation of Flood Routing Processes in Semi-Enclosed Underground Spaces Based on Smoothed Particle Hydrodynamics-Discrete Element Method

[J]. Tunnel Construction, 2025 , 45(S1) : 125 -135 . DOI: 10.3973/j.issn.2096-4498.2025.S1.014

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