Consideration on Construction of Disaster Prevention System in Urban Underground Space after Heavy Rainstorm

Underground space disaster prevention is the basis of building a disaster prevention city. The disaster causing factors of urban underground space and assumption of disaster prevention system are proposed. Firstly, the characteristics of heavy rainstorm and disaster in Henan are analysed, the main disaster causing factors of urban underground space in rare heavy rainstorm are discussed from the aspects of hydrogeological conditions, landform, drainage and waterlogging prevention system. Then the strategies of urban underground space disaster prevention system during heavy rainstorm are proposed from the aspects of extreme weather disaster risk assessment, disaster prevention and control planning, post disaster urban recovery planning and so on. Finally, in view of the complex and diverse challenges faced by urban underground space, thoughts are expounded on the construction of urban underground space in the future from the aspects of ecological urban underground space planning, the construction of scientific underground space prevention system and the improvement of underground space disaster emergency rescue measures.