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青藏铁路楚玛尔河地区广泛应用了片石气冷及碎石护坡复合路基结构,根据该地区复合路基与一般路基实测地温资料,对比分析了复合路基与一般路基的地温状况,研究2种路基结构保护多年冻土的效果。结果表明:(1)一般路基地温场整体向不利于冻土路基稳定的趋势发展,难以起到全面保护多年冻土的作用;(2)复合路基在降低地温和维护地温场对称性方面都具有显著效果,能主动冷却冻土路基,很好地保护多年冻土。
Qinghai-Tibet Railway in the area of the Chumar River Chutta stone air-cooled and gravel slope compound roadbed structure, based on the composite subgrade and the general subgrade ground temperature data, comparative analysis of the composite subgrade and the general roadbed temperature conditions, the two subgrade structures Protect permafrost effect. The results show that: (1) The overall temperature field of common embankment tends to be unfavorable to the stability of permafrost subgrade and it is difficult to fully protect the permafrost. (2) Has a significant effect, can take the initiative to cool the frozen soil roadbed, well protected permafrost.