Civil air defence basement design code
Civil air defence basement design code
I. Area calculation
Calculate the building area, effective area and shelter area of air defense basement. The air defense basement mentioned here refers to the components that directly accept the dynamic load of the air defense basement shock wave, that is, the area surrounded by the external wall, temporary wall and protective sealed door (explosion-proof wave door) frame of the air defense basement. An enclosed space area formed by fences, sealing walls and protective partitions. Air passages, shafts, stairs, ventilation pipes, etc. The air defense basement cannot be included in the construction area of air defense basement. The effective area of civil air defense refers to the area where people and equipment can use it. This value is the difference between the building area and the structural area of the air defense basement. Artificial residential area refers to an effective civil defense area that provides shelter for people, materials and vehicles. The value is the effective area of civil air defense minus the following areas: (1) the area of oral cavity, anti-virus passage and closed passage; (2) ventilation, water supply and drainage, power supply, chemical defense, communication and other professional computer rooms. (3) Toilets, washrooms, water rooms and other areas.
Second, the engineering design
Second, the design of the air defense basement professional team project and personnel evacuation project should be based on the coverage area of Table 3.2. 1-2 "Regional Standard" of this specification, and the number of people taking refuge or equipment should be determined. The "area standard" should not be arbitrarily raised, resulting in a decrease in the number of people or equipment who need refuge, resulting in a narrow entrance to Feng Shui, and the protective equipment and professional design parameters can not meet the actual needs in wartime. The civil air defense material warehouse project should mainly store grain and materials. The minimum width of the material entrance and exit door is1.5m. The forklift should be considered for the main entrance of the material warehouse with a building area of more than 2000m. The design drawings shall specify the lanes and vehicles. The channel width should meet the traffic requirements. When designing the main body, open-frame design should be classified according to materials. The length of each stacking area shall not be greater than 15m, the distance between two stacking areas shall not be less than 800mm, the distance between materials and walls shall not be less than 700mm, and the distance between materials and beam bottom shall not be less than 300 mm ... The design drawings shall specify the size of the stacking area and the types of food and materials stacked in the stacking area (the types and specific gravity of food can be specified in Appendix A (GB 5009) of Load Code for Building Structures- The effective area of diesel power station shall be determined according to the following standards:
Step 3: Get to the point
3. The single excavation civil air defense project combined with residential buildings should be divided into two points: 1 to meet the service radius of asylum seekers in residential areas. The requirement is that the service radius cannot exceed 200 meters. The service radius here refers to the distance from the stairs of the ground building to the entrance of the civil air defense project, excluding the distance of the stairs. 2. Class A civil air defense projects, the main entrances and exits are underground. The entrance should be outside the collapsed buildings and meet the requirements of 3.3.3 of this specification. If not, anti-blocking measures should be taken. 4. According to Article 3.2. 15 of the Code, "The superstructure is a Class A air defense basement with reinforced concrete structure, and the bottom of the roof shall not be higher than the outdoor ground elevation; The bottom surface of Class B air defense basement should be higher than the outdoor ground level. Exceeding the basement height of 1/2 ". The "outdoor ground plane" here refers to the lowest point of the outdoor ground plane, that is, the place where the external wall bearing the impact fluctuation load contacts with the soil. The width of soil layer is not less than 3m, and it is not less than the thickness of bad soil layer. V specified in specification 4.5.4. Article 3.3.2 of the Code refers to the basement where air defense meets the following conditions, and no outdoor entrance is required. The first point of the condition is "and other reliable entrances and exits of civil air defense projects, whose resistance level is not lower than that of air defense basement." Connection ",other civil air defense projects here refer to other civil air defense projects that are completely disconnected from the structure of the air defense basement and connected with another protection unit near the air defense basement within a certain distance rather than in the air. . 6 air defense basement is located on the second floor (inclusive) or above, or the main entrance is located in the ordinary basement. The location and scope of the evacuation passage from the main entrance of the air defense basement to the outdoor ground should be marked on the wartime building plan. The main entrances and exits and evacuation passages have closed roofs, and the compression wave effect of weapon shock wave should be considered on the outer wall, roof and floor of soil. When the air defense basement is located at the lowest floor of the multi-storey basement, the roof and floor as the main entrance and exit evacuation passage should be designed according to the provisions of 4.7. 1 1 and 4.8.6. "specifications"; When the air defense basement is not at the lowest floor of the multi-storey basement, it can be designed according to Section 4.8. 12 of the Code. For the general basement roof as an evacuation passage, the dynamic load value should be adopted according to Table 4.7.2 or Table 4.8.2 without considering the influence of the superstructure; The floor of the evacuation passage should consider the compression wave in the soil as the floor of the basement evacuation passage under the public basement. The dynamic load value should be adopted according to the standard Table 4.8.2, regardless of the influence of the superstructure. The wall between the main entrance and exit evacuation passage and the ordinary basement should be set up. The wall should be a reinforced concrete wall, and the wall (column) should consider the horizontal equivalent static load caused by the pulsating pressure of nuclear impact. The load value shall conform to 4.8 of the specification. 10 options. 7. When the air defense basement is adjacent to the ordinary basement, the ordinary basement adopts reinforced concrete structure. The general basement roof within 8m from the partition wall of civil air defense basement is usually not suitable for opening. Opening is required for normal use. The clear width should not exceed 3 meters, the clear length should not exceed 6 meters, and the total number of openings in this range should not exceed 2. Temporary shelter design is adopted, and the design is carried out according to the requirements of national standard atlas 07FJ02- 126/ 127 of Technical Implementation of Preventive Measures. The clear width and length of the hole in the basement outside the 8m range of the partition wall should not exceed 3 m. The cross-sectional area of entrances and exits of public basements should not be greater than 1/7 of the cross-sectional area of vertical basements, and the total opening area of external walls of ordinary basements should not be greater than 50% of the wall area. When the size of the opening at the top of the public basement is larger than the above requirements, the adjacent partition walls of the civil air defense basement and the public basement shall be determined according to the relevant requirements of the civil air defense wall in sunken plaza. Article 8. The exterior wall design of air defense basement in sunken plaza is easy to produce a large area of directly exposed exterior wall of air defense basement. When protecting the external wall, priority should be given to the design between the external wall of the air defense basement and the sinking square. Use an ordinary basement with a width less than 8 meters as the transition area. Ordinary basements shall meet the requirements of Article 7 above. The protective exterior wall can be designed according to the partition wall between the air defense basement and the ordinary basement. If the transition zone is not available, the minimum protective layer thickness of nuclear weapons adjacent to the sinking square on the outer wall of the air defense basement shall be determined according to Table 3.3. 13. The nuclear load value can be found in Table 4.8.8 of the specification. Use outdoor direct one-way entrance (zeta
IV. Safety performance
In terms of security, it can be said that it is thoughtful. 50 cm thick reinforced concrete and fully enclosed passage design, complete ventilation pipes and basic air defense basement are foolproof in floods and wars.
Code for design of civil defense basement
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