青藏铁路楚玛尔河地区片石气冷路基热稳定分析

Analysis of Thermal Stability of Air-cooled Rubble Subgrade in Qumar River Region along Qinghai-Tibet Railway

青藏铁路楚玛尔河地区广泛应用了片石气冷路基结构,根据该地区片石气冷路基实测地温资料,分析了地温状况,研究了该路基结构保护多年冻土的效果.结果表明:片石气冷路基能够起到抬升多年冻土上限,主动冷却冻土路基,保护多年冻土的作用,但地温场存在左右不对称问题,建议采取碎石护坡、热棒等措施来调整.

The air-cooled rubble subgrade structure is widely applied to Qumar river region along Qinghai-Tibet railway.According to the measured ground temperature data of air-cooled rubble subgrade in the region,the ground temperature is analyzed and the effect of the subgrade to protect the permafrost is studied.The results show that the air-cooled rubble subgrade can raise the upper limit of permafrost,cool roadbed actively and protect the permafrost.However,the geothermal field is asymmetric on the left and right,so the rubble slope,thermal pipe and other measures can be used to adjust it.