Abstract:

The influence of location of ventilation Tjunction for tunnel construction on the air volume of ventilation pipe is serious; It is illustrated that the ratio of main ventilation pipe diameter to subventilation pipe diameter is the main factor for determining the location of ventilation Tjunction. Three calculation cases are given, of which the calculation results are compared with an actual project. Finally, rational locations of ventilation Tjunction are obtained.

Key words: tunnel, construction ventilation, ventilation Tjunction