Improving the efficiency of urban underground structures as objects of civil defense

The rapid development of cities, as well as the growing number of natural and man-made disasters, makes it important to place part of various urban buildings underground, as well as design the operation of these facilities in emergency situations. The article is devoted to the study of the possibility of using urban underground structures as protective objects in the mountainous regions of Russia (using the example of Primorsky Krai). It was proved that for successful development of underground space and implementation of existing projects, an appropriate urban planning program should be developed, which would link socio-economic issues with architectural planning and engineering and technical measures, and such a program is necessary at the stage of engineering development of new territories or during reconstruction plots of old buildings. The technological parameters of the efficiency of dual-purpose underground structures are revealed. Capacity, volume of the structure and the required volume of air were taken as decisive parameters in the design of such a structure. The obtained mathematical dependences of the volume of the underground structure on the number of people being sheltered and the necessary ventilation on the capacity allow to interpolate and extrapolate, obtaining the necessary parameters of the technological efficiency of using urban underground structures as dual-use objects.