Research on Road Surface Skid Resistance Technology under Ice and Snow Environment at Tunnel Entrance based on Changes of Friction Coefficient
In order to facilitate driving safety and prevent traffic accidents at the entrance of highway tunnels in mountainous areas under ice and snow environment,the changes in road friction coefficients at different sections of the tunnel entrance and under different weather conditions caused by the special weather and traffic environment at the entrance of mountain highway tunnels are studied.Through indoor tests,the variation of road friction coefficient under different working conditions is analyzed.Based on the relationship between road temperature,the relative humidity of the pavement environment and the coefficient of the pavement model,a relationship model between friction coefficient and pavement temperature and humidity is established to predict the pavement friction coefficient at different weather conditions under ice and snow conditions.The research results show that compared with the friction coefficient calculated by the established model,the average errors of the friction coefficient measured in the experiment under different working conditions are 9.99％,7.81％,and 9.88％,respectively.Based on the prediction results,it is determined that the skid resistance technology for the tunnel entrance pavement under ice and snow environments should be set at a distance of-200 m to+60 m from the entrance,which is about to penetrate a distance of 60 m inside the tunnel.The anti-skid measures are proposed to lay phase change asphalt concrete in the set section.
mountainous expresswayroad friction coefficientice and snow environmenttunnel entrancerelationship model
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