Study on ventilation design for civil air defense of rail transit

Combined with an actual project, elaborates the design ideas of civil air defense ventilation of rail transit. Focusing on the different grade of nuclear, biological and chemical (NBC) protection, proposes a calculation method of ventilation rate in wartime. Carries out a layout of wartime ventilation system, compares two gas filtration ventilation layout methods and provides suggestions. Explains the conversion of peacetime and wartime, and points out the protective treatment methods and problems in pipeline design. Provides a reference for civil air defense ventilation design of rail transit projects.