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2. Research on the Prevention of Frost Damage in Tunnels;Chen,2004
3. Application of hard urethane foam for prevention of frost damage in tunnels at cold area;Chen;Journal of Chang’an University (Natural Science Edition),2006
4. Field test and analysis of effect of antifreeze thermal insulating layer in Tiziling Tunnel;Chen;Highway,2006
5. Technique of preventing frost damage in highway tunnel;Chen;Journal of Chang’an University (Natural Science Edition),2006