What kind of pipe should be used for underground civil air defense engineering wire pipes?

The use of welded steel pipes for electrical wires in underground civil air defense projects is mandated by Article 7.4.3 of the "Code for Design of Civil Air Defense Basements".

According to the "Civil Air Defense Basement Design Code":

Air defense basements have requirements such as "anti-nuclear weapons, conventional weapons, biological and chemical weapons", and the handling of electrical pipelines entering and exiting air defense basements must be consistent with Engineering protection and sealing functions are consistent. The protection and sealing of these parts are very important. When the pipeline seal is not tight, it will cause air leakage, poison leakage, etc., and even overpressure will not form in the room during poison filtration and ventilation.

For the embedded pipes on the protective and airtight partition walls, corresponding protective and airtight measures should be taken according to the different resistance levels of the project. Adopt airtight sealing measures for embedded pipes in closed walls.

Hot-dip galvanized steel pipes with a wall thickness of not less than 2.5mm should be used for electrical embedded pipelines that pass through exterior walls, void walls, protective sealed partitions and sealed partitions. Pipes in other parts of the pipeline can be selected according to the design specifications or regulations of the relevant ground construction.

Note: Underground civil air defense projects are underground protective buildings built separately to ensure the shelter of personnel and materials, civil air defense command, and medical rescue in wartime, as well as basements built in combination with ground buildings that can be used for air defense in wartime. Civil air defense projects are important facilities to prevent sudden enemy attacks, effectively shelter personnel and materials, and preserve war potential.

Extended information:

Key points in the design of underground civil air defense projects:

When designing professional air defense basement team projects and personnel sheltering projects, the sheltering area should be based on the "standards" The "area standard" in Table 3.2.1-2 determines the number of shielding personnel or equipment. It is not allowed to increase the "area standard" arbitrarily, resulting in a reduction in the number of shielding personnel or equipment, resulting in smaller entrance and exit widths, protective equipment, and wind, hydropower, and professional design parameters. It cannot meet actual wartime needs.

The civil air defense material warehouse project should be mainly for storing food and materials. The minimum width of the material entrance and exit door is 1.5m. For the main entrance and exit of the material warehouse with a building area greater than 2000m2 for protection units, forklifts should be considered. The design drawings should Clearly define the vehicle lanes, and the width of the lanes should meet the traffic requirements.

When the air defense basement adopts pile foundation and is designed according to the characteristic value of single pile bearing capacity, the strength of the pile body should be calculated based on the load combination value that takes into account the nuclear dynamic load from the upper wall and column; the air defense basement wall , the strength of columns should be checked according to the load combination value of the superstructure's self-weight and dynamic load as required by the "Code", and the improvement of material strength of piles, walls, columns, etc. should be considered in accordance with the provisions of the "Code".

Baidu Encyclopedia - Design Specifications for Civil Air Defense Basements

Baidu Encyclopedia - Civil Air Defense Basements

Baidu Encyclopedia - Underground Civil Air Defense Projects