Research and application of pressurized oxygen-enrichment construction technology and mechanism in plateau area
In order to solve the problem of low-pressure and anoxic plateau environment harming human health,this study proposed a pressurized oxygen-enrichment construction technology for plateau area through comprehensive integra-tion of oxygen supply and pressurization system to improve human blood oxygen index and the working and living envi-ronment in the plateau area.Based on the analysis of the pressurized oxygen-enrichment mechanism,the study put for-ward a concept of composite equivalent altitude method,analyzed the synergistic process of the two methods,systemati-cally discussed the way of determining the pressurized oxygenation index,and explained the mechanism through relevant engineering application examples.The results show that under different altitude conditions,the indoor oxygen partial pressure increases linearly with the increase of indoor oxygen increase amplitude,the indoor equivalent altitude decreases linearly,and the changes of indoor oxygen partial pressure and equivalent altitude are roughly the same under pressurized conditions.For pressurized oxygen-enrichment constructions,the pressurized oxygen-enrichment index can be divided into A,B and C levels in actual engineering,and reasonably determine the pressurized oxygen-enrichment index accord-ing to the limit state of the structural bearing capacity,the validation calculation of the limit state of the normal use of the structure and the upper limit of safe oxygen enrichment concentration at different altitudes(e.g.the upper limit of the safe oxygen enrichment concentration at altitudes of 3 000,4 000 and 5 000 m,or the safe oxygen-enrichment increase-ment of 4.7%,5.8%and 7.1%,respectively.)by combining with the composite equivalent altitude calculation formula.
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