1C21 Development of the Evaluation Method on Measures against Inundation at an Underground Station(Safety-Infrastructure)

Abstract

In recent years, heavy rainfall in Japan has been increasing due to global warming although it originally has high precipitation. Over the past years, some underground stations were inundated due to heavy rainfall. Moreover, there is a possibility that more underground stations would be inundated in the future. Therefore, it is important to consider appropriate measures against inundation because flood in underground stations would cause serious damages which endanger the safety of passengers. In this research, we developed the prototype of system to evaluate measures against inundation at underground stations in case of flood damages with the simulation technique. We carried out case studies to verify the effects of some prevention against inundation by this prototype-system. As a result, by the prototype of system, we can calculate the time required for evacuation, the number of passengers who walk through inundated spots and, finally evaluate the effects of measures against inundation. Also, by case study with the developed system in a virtual station, we confirmed that it is possible to verify the effects of combinations with each countermeasure against inundation. In conclusion, we could achieve some positive results in the development of this system. However, our system is not enough practical to be utilized at this stage. At this stage, we are considering to improve flood damage model in order to be system based on the actual phenomenon than the present. Finally, we would like to develop this system continuously to be utilized practically in order to contribute to promote countermeasures against inundation in existing stations.