Design of oxygen supply technology for high-altitude tunnel construction
LI Ning
YONG Sidong
Abstract：Objective:To tackle the severe hypoxia in high-altitude tunnel construction,ensuring personnel safety and construction efficiency.Methods:By analyzing various oxygen supply technologies,including liquid oxygen,cylinder-based systems,and pressure swing adsorption(PSA),it is found that localized oxygen-enriched air and PSA oxygen production were superior options.Results:A set of comprehensive oxygen supply strategy was put forth:combining local dispersion oxygen supply with long-tube respirators for excavation sites;advocating personal oxygen carriers for shotcrete operations;and employing mobile oxygen vehicles and dispersion oxygen supply in secondary lining works and living areas.Taking a 4 000 m altitude tunnel model as an example,two sets of PSA oxygen production equipment were designed to effectively elevate oxygen concentrations to 65％of sea-level standards,which was equivalent to the constructionelevation dropping to 3 600 m.Conclusion:The comprehensive application of PSA oxygen production and tailored oxygen supply method can effectively deal with the challenges of high-altitude construction and provide scientific guidance for similar projects.
Keywords：high altitudeoxygen deficiencyoxy gen-enriched airoxygen supply modepersonnel safety
Publication Date：2024-06-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 41-45 )