Tunnel Description | |
Length of the tunnel (m) | 900 |
Effective width (m) | 9.5 |
Effective height (m) | 7 |
Open cross-sectional area (m2) | 66.5 |
Camber (%) | 0.5 |
Open area of discrete drains or continuous slot (per Xd m) (m2) | 0.22 |
Interval between drains, or slot length used to define Ad (m) | 50 |
Time taken to activate emergency ventilation (min) | 10 |
Volume flow rate extracted from emergency ventilation regime (m³/s) | 206.15 |