Research on the Key Application Techniques of Thermal Insulation and Frost Prevention at Highway Tunnel Portals in Severe Cold Regions
With the construction of more and more tunnels in cold regions,the problem of freezing damage during tunnel construction is becoming increasingly frequent.As an initial and throat part of a tunnel,a tunnel portal is of-ten affected by rain,snow or temperature changes throughout the year,resulting in freezing damage.The main freezing damage of the tunnel is ice hanging,water seepage and lining cracking in the lining tunnel.Based on the project of the Yulanling Highway Tunnel in Benxi City,this paper analyes the variation law of the temperature field of the tunnel caused by different thermal insulation materials at tunnel portals in severe cold regions,analyzes and compares the various aspects of the thermal insulation materials widely used in tunnels in severe cold regions,and proposes more optimized thermal insulation methods.The thermal insulation and frost prevention of portal sec-tions are very important,which is the key to ensure the thermal insulation and frost prevention of the tunnel,and only by doing a good job of frost prevention and thermal insulation at portal sections,can the thermal insulation and frost prevention of the entire tunnel be done.
Temperature fieldTunnel portalNumerical analysisThermal insulation material
万方数据
维普
