Study on the Influence of Slope on the Airflow Structure Characteristics of Long and Large Tunnels During Construction

With highway tunnel construction technology development and progress, my country's social infrastructure construction is booming. Many tunnels have a particular slope. The slope is more important for the construction of long and large tunnels-high demands. Based on the actual engineering case of Xinglong Tunnel, this paper uses FLUENT numerical simulation software to calculate. The research results show that the slope has a significant effect on the change of wind speed along the way. The greater the pitch, the higher the wind speed along the tunnel at the same distance from the tunnel face. The wind speed decreases more slowly along the tunnel as a whole; the more significant the slope, the lower the dust concentration in the tunnel at the same distance from the tunnel face, which is more conducive to the rapid discharge of dust generated by the tunnel face blasting in the tunnel.