Study On Temperature Field And Variability Of Tunnel In Cold Region

Freezing damage like the fracture on the surface of lining, peeling off,ice covering,watering and freezing of road surface in tunnel s have been greatly weakening the service aswell as a heavy burden on maintenance of tunnels built in cold regions in our country. Withthe gradually subsiding of construction transportation infrastructure in the west of China, thetunnel project has been extending to high altitude areas. Compared with traditiontunnels,tunnels in cold regions will take large size and require higher technology. Moreover,the extreme climate are very unfavorable for these tunnels. Therefore, problems of how totake effective measures to prevent freezing damage have constantly coming into our view andstill remain to be solved.On the basis of the research of “The Temperature Field Variability and Seep Variabilityof Tunnel in Cold Region”, to provide a designing basis for freezing prevention andinsulating layer. the author set up a one-dimensional thermal conduction model with onemedium, come up with the analytical calculating solution and compare the solution withsolution of finite element numerical simulation. Through field testing, theoretical analysisand finite element numerical simulation, the paper implement the study on the temperaturefield and variability of tunnel in shallow part, on the temperature field and variability oftunnel with insulating layer,the temperature field and variability of deep drainage passagesand design parameters of insulating layer. The consequences of simulation suggest thattemperature distribution of tunnel regularly changed along with outside temperature afterevacuation for three months and hysteretic changed compared with outside temperature.