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以青藏公路五道梁的通风管试验路为计算模型,对不同形式的通风管路基的温度场进行了有限元计算,重点分析了通风管管距对通风管路基温度场的影响。研究表明:通风管间距对路基温度场有较大影响,冷季通风管间距越小,对保护冻土路基越有利,暖季则反之。从路基温度场的总体状况来看,小间距通风管路基对保护冻土路基稳定更加有利。
Taking the ventilation pipe test road of the five beams of Qinghai-Tibet Highway as the calculation model, the temperature field of different types of ventilation pipe foundations was calculated by finite element method. The influence of ventilation pipe distance on the temperature field of ventilation pipe embankment was analyzed emphatically. The research shows that the distance between ventilation ducts has a great influence on the temperature field of subgrade. The smaller the spacing of ventilation ducts in cold season is, the better it is to protect the subgrade of frozen soil and the vice versa in warm season. From the overall condition of the subgrade temperature field, it is more beneficial to stabilize the subgrade of frozen soil in the small spacing ventilation duct subgrade.