Abstract:
The railway construction utilizes several kinds of equipment, resulting in gas emissions. The releases of emissions can affect both environment and human health. Many previous studies attempted to explore gas emissions in railway construction but they did not analyze gas emissions at the construction process level, which causes the limitations of process improvement. This research aims to apply simulation model for analysis and design construction process to minimize emissions from equipment operation that comprises of track bed and track panel. The simulation model of the railway construction process presents that total emissions are equal to 52,923 kg/km. The percentage of emissions is found at 64.40, 24.28, 6.60, and 4.48 from track bed, bottom ballast, track panel and rails settling respectively. The categorization of emissions from equipment viewpoint found that trucks in track bed process have a higher proportion of emissions around 33.60 %. Design earthmoving process such as adjustment of equipment to full operation and allocation of resources related with the quantity of material and other resources (10 Trucks and 1 Loader) by the simulation model. The result shows that CO2 emission from earthmoving process can be reduced approximately 5,824 kg/km. or 1,107 Baht/km. carbon credit. The simulation model can be applied to analyze and design railway construction process that reduces emissions. It can also help to allocate resource and optimize the construction process.