Establishment and Validation of a Model for Predicting Snow Drift Distance in Cold Area Tunnel

To study the snow drifting distance law and the main influencing factors of the entrance and exit section of the alpine tunnel, and to improve the safety of the tunnel entrance and exit section in the cold area, firstly, the data of wind speed, snowfall and snow drifting distance of the entrance and exit section of the alpine tunnel at high altitude were collected, and the correlation analysis of the independent variables of wind speed and snowfall on the distance of the entrance drifting snow was investigated by using the method of statistical analysis to set up a prediction model of the snow drifting distance of the tunnel in snowy days; Secondly, in order to verify the accuracy of the prediction model, FLUENT software is used to simulate the wind-blown snow scenario in the tunnel entrance section, and then the simulated values of the simulation results are analyzed in terms of the error with the calculated values calculated by the prediction model. The results show that the simulation results are in good agreement with the calculation results of the prediction model, indicating that the prediction model is able to better quantify the important characteristic of the distance of drifting snow in the tunnel entrance and exit sections. This provides a reference for further research on the evolution of the friction coefficient of tunnel pavement in cold regions, and also lays a foundation for safe driving in the entrance and exit sections of high-altitude tunnels in cold regions.