Complementary Ventilation Design Method for a Highway Twin-Tunnel Based on the Compensation Concept

Table 1

Long-term required air volumes (m³/s).

Design conditions	Right line		Left line
	CO	Smoke	CO	Smoke
30km/h	288.70	349.93	221.40	152.47
40km/h	216.53	345.96	207.56	125.79
50km/h	173.22	503.90	166.05	120.76
60km/h	144.35	419.92	138.37	100.63
70km/h	122.70	538.87	117.62	91.65
80km/h	129.92	598.18	103.78	80.87
Traffic block	300.10	427.58	291.13	169.74
Fire	188.37		188.37
Minimum Air exchange	415.53		381.21

Note: the item marked with indicates the maximum required air volume for pollutant dilution.