Considering the challenge of building a shaft in mountainous areas, an operation ventilation scheme via parallel adit was proposed for expressway tunnels based on a super-long tunnel project with a large overburden in Tianshan. A study of the design of a parallel ventilation adit instead of an inclined shaft was conducted by a large number of ventilation network calculations and the analysis of the orthoronal design of the total cost of the ventila-tion system to analyze the short-term and long-term ventilation mechanism and ventilation scheme of this tunnel. The results show that:1) the order of factors affecting the total costs of the ventilation system is the length of the in-dependent ventilation section, the ventilation volume, and the ventilation duct area; 2) the selected short-term and long-term ventilation scheme has solved the problem of operation ventilation in an expressway tunnel with a low traf-fic volume;and 3) as for tunnels with lengths of several kilometers, it is not advisable for the polluted air at the front section to be totally exhausted from the ventilation duct--it may be partly exhausted to the next main tunnel section to reduce energy consumption.%针对越岭隧道由于大型山脉的阻隔而不便修建竖斜井的困境,文章以跨越天山的某特长深埋公路隧道为研究背景,提出了高速公路隧道平导运营通风方案.并通过大量的风网解算及通风系统总造价的正交设计分析,研究了特长深埋公路隧道取消斜竖井、采用平导进行通风的设计方法,分析了该隧道近远期通风机理和通风方案.结果表明:影响通风系统总造价的因素排序为:独立通风段长度、排风量、排风道面积、送风道面积;甄选的近远期通风方案很好地解决了较低交通量条件下高速公路隧道的运营通风难题;通风道长度达数公里的条件下,前段污风不宜全部从排风道排出,要充分利用大断面主隧道排风,减少能耗.
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