Disaster Prevention Planning Study For The High-density Area Of City Center

With the development of urbanization and urban construction, the high-densitystate of city center gradually formed. The issues like population expansion, resourcedepletion, and environment degradation, especially the contradiction among urbanconstruction, population and land displayed prominently in the high-density area ofcity center.The problem of environment, climate, ecological in city center is moreserious than in the other area of city. With its strong fragility, the disaster in city centeris easy to cause expanding and spreading, and lead to significant casualties, hugeeconomic losses, and social influence.And the characteristics of personnel-intensive,elements-concentrated, complex interaction make the refuge layout and evacuationorganization in it greatly limited.Therefore, disaster prevention in high density centerarea is the considerable and thorny research issue of the urgently urban disasterprevention problem.Through the combination of quantitative and qualitative method, the papersummarized the disaster feature of high-density area in city center. With the principleof comprehensive disaster prevention, combination of peacetime and disaster,andresilient city, it put forward four concepts of the system: the combination ofnormal disaster prevention and emergency response, the combination ofair-ground-underground disaster-prevention space, the combination of urban space and buildinginternal space, and the combination of engineering and non-engineering measures.Further more, it put forward planning strategy correspondingly.First, it established the normal disaster prevention system from macro, meso andmicro levels, and put forward the normal planning strategy from the aspects of landlayout, transport, open space, building space environment, and infrastructure. Then interms of emergency response, according to the featuresof three-dimension andintegration in the high-density central area, this paper put forward its disasterprevention system should connect air, ground and underground level in verticaldirection and also unite the building space and urban space in horizontal direction.Thepaper divided the emergency disaster-prevent system into early and later period. In theearly part, it proposed the strategy of reduce hazards, monitor the state of disasters,eliminate or reduce direct effects, weaken or eliminate hazards, prevent disaster expand and spread, and the strategy ofsafety evacuation.In the later period, the paperconstructed the emergency refuge system with the combination of air, ground andunderground space in high-density city center. In addition, the paper explored theintegration ofcutting-edge technology(digital technology, intelligence technology, etc)and disaster prevention planning, and discussed the important role of social disasterprevention system and its corresponding strategy.Finaly, takingTianjin Xiaobailou main city center as the case, the paper predictedits potential disaster risk and drew its potential risk evaluation map. Then the paperput forward the norm strategy of disaster prevention and made its emergency disasterprevention system planning. More over, aimed at the characteristics of highly mobilein high-density city center, the paper designed its disaster prevention APP based onmobile phone platform, in order to guide people to make disaster-preparedness andemergency refuge activities effectively.