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Table 2 CO2 emissions in the construction phase of the BBT
From: A heuristic method for determining CO2 efficiency in transportation planning
Main process elements | Sub-process elements | CO2 [kt] |
|---|---|---|
Boring works | Conventional excavation | 17.68 |
Mechanical excavation | 101.91 | |
Manufacturing of TBMs | 3.10 | |
Transportation of TBMs | 0.36 | |
Rock blasting | 7.01 | |
Subtotal | 130.07 | |
Transportation using belt | 14.70 | |
Transportation of the spoil | Transportation using trucks | 5.74 |
Subtotal | 20.45 | |
Production of the construction materials | Concrete | 1,580.37 |
Steel | 358.55 | |
Transportation of the construction materials using trucks | 2.51 | |
Subtotal | 1,941.44 | |
Working sites | Ventilation and cooling of the tunnels | 150.71 |
Water treatment plants | 14.26 | |
Functioning of the offices and the mechanical shops | 1.48 | |
Lighting of the tunnels | 8.75 | |
Lighting of the external areas | 13.19 | |
Subtotal | 188.39 | |
Total | 2,280.35 | |
Total (rounded) | 2,280 | |