In order to prevent the freezing damage of tunnels in cold regions,the heating system with ground source heat pump was applied at Zhadunhe Tunnel of Boya Highway in Inner Mongolia Autonomous Region of China. Heat exchange pipes were buried between the initial lining and the secondary lining in series arrangement of vertical. Hydration heat induced by lining construction in tunnels influenced the temperature field of surrounding rock,and then influenced the heat transfer rate of heat exchange pipes. Research...