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Table 1 Main process elements of the analysis. Source: [33], elaborated
From: A heuristic method for determining CO2 efficiency in transportation planning
Main process elements | Sub-process elements |
|---|---|
Boring works | Conventional excavation |
Mechanical excavation | |
Manufacturing of TBMs | |
Transportation of TBMs | |
Rock blasting | |
Transportation of the spoil | Transportation using belt |
Transportation using trucks | |
Production of the construction materials | Concrete |
Steel | |
Transportation of the construction materials using trucks | |
Working sites | Ventilation and the cooling of the tunnels |
Water treatment plants | |
Functioning of the offices and the mechanic shops | |
Lighting of the tunnels | |
Lighting of the external areas |