高原低气压环境下围护结构气密性改造技术分析

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中图分类号：TU111.48;TU241 文献标识码：A文章编号：1672-3791（2026）02-0149-03

Analysisof Airtightness Renovation Technology for Enclosure Structurein PlateauLow Pressure Environment

SU Xiaowen1* ZHANG Ruifeng²

1.Zhonghuan Urban and Rural Planning & Design Group Co.， Ltd.; 2.School of Architecture and Urban Planning，

Lanzhou JiaotongUniversity，Lanzhou，Gansu Province，73oo7O China

Abstract：The sealing systems of existing building enclosure structure are prone to aging，sealing failure，and wind pressure damage in plateau environments，necesitating optimization and retrofitting tailored to theunique climatic conditions ofhigh-altitude regions.This studyanalyzes the mechanisms ofair infiltration underlow pressure conditions，sealing failure characteristics caused by diurnal temperature variations，and the impact ofstrong wind environments on the airtight performance of building enclosure structure.It proposes optimized sealing systems methods suitable for plateaus，including flexiblesealing and thermal adaptation enhancement techniques forconnection nodes，and airtight construction retroftting processes for high wind pressure environments.Engineering tests validate the effectiveness of these retrofitting technologies，providing technical support for improving the airtightness of existing buildings in plateau regions while enhancing the long-term durabilityand environmental adaptabilityof building enclosure structure.

Keywords： High-altitude Low-Presure environment; Enclosure structure;Air tightnessimprovement; Sealing sys - tem optimization

高原地区建筑面临低气压、昼夜温差大、强风等极端气候条件，围护结构的气密性直接影响建筑的热舒适性、能耗水平和耐久性。（剩余3042字）