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.
NETL
NSTL
万方数据
维普
