Christie, Parker & Hale, LLP
Method and pavement structure for protecting highway subgrade in frozen soil area
The present invention provides a method and pavement structure for protecting highway subgrade in frozen soil areas. The pavement structure has two or more pavement layers having gradient thermal conductivity; the thermal conductivity is layered among the pavement layers and is lowered from top to bottom, so that the pavement forms a uni-directional thermal conducting tunnel from the subgrade to the air. Heat can be easily released from the subgrade into the air, and is prevented from being transferred from the air to the subgrade. In this way, the frozen soil layer beneath the subgrade is cooled, so that the frozen soil table is made stable, and the highway subgrade in frozen soil areas is protected.
CCCC First Highway Consultants Co., Ltd Southeast University
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E01C C04B C04B C04B C04B
inventional additional inventional additional additional
Shengyue Qiyang Jianbing Juan Xiaofeng Shuangjie
Wang Zhu Chen Zhang Zhou Wang