Research Article
Investigation on the Time Factor of CO-Based Emission Factors for Sustainable Development of Urban Tunnels in China
Table 4
The general parameters of the four tunnels.
| | Tunnel | Road grade | Length (m) | Design speed (km/h) | Cross-sectional area (m2) | Ventilation system |
| | Henglong Mountain Tunnel | Left bore | Expressway (bidirectional six lanes) | 2330 | 60 | 102.91 | 12 jet fans (main tunnel)
3 jet fans (ramp) | | Right bore | 2275 | 12 jet fans (main tunnel)
3 jet fans (ramp) |
| | Cejiexian Subway | Left bore | Highway (bidirectional six lanes) | Main bore:4480 | 80 | 76.80 | 100 jet fans | | Right bore | 66 jet fans |
| | Jiuweiling Tunnel | Left bore | Expressway (bidirectional six lanes) | 1472 | 80 | 91.45 | 1shaft + 6 jet fans | | Right bore | 1447 | 22 jet fans |
| | Dameisha Tunnel | Left bore | Highway (bidirectional six lanes) | 1521 | 60 | 88.10 | 12 jet fans | | Right bore | 1540 | 6 jet fans |
|
|
