Abstract: Ventilation design in the construction stage is an important part of the highway tunnel construction organization design. This paper presents a case history of Wujingming Tunnel of Huali Expressway Project. The ventilation in the tunnel construction is carefully designed and calculated to ensure the safety of tunnel construction and improve the quality of tunnel construction. The calculation method of ventilation volume, ventilation resistance and wind pressure in tunnel construction is proposed. Throughout the detailed calculations, the ventilation volume, ventilation resistance and ventilation pressure of Wujingming Tunnel construction were obtained. The results provide important technical parameters for the implementation of the ventilation system in the construction of Wujingming tunnel so that the construction safety of the tunnel was warranted.

Key words: highway tunnel, construction ventilation, design calculation, ventilation volume, wind pressure