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What is the best way to estimate tunnel excavation cost?
Hello everybody,
If I have a tunnel to be excavated in mechanical means, what is the best way to estimate the cost?
When I mean excavation, I mean also laying segments. I am assuming TBM tunnelling. A metro tunnel for example.
Good evening.
Abbas
cover tunnel photo by: Matt Brown from London, England / CC BY
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Once I had seen a contract between the government authority and a contractor. The contractor was to be paid per cubic meter of ground excavated on the tunnel.
Say, the contractor is given the task of excavating a tunnel of diameter 6.10 meters and the TBM has progressed 50 meters that week. You calculate the volume of the cylinder of 6.10 meters in diameter and 50 meters in height and find the total cubic meters of ground excavated in that reporting period. And get paid by multiplying the total cubic meters with the price of excavating with one cubic meter.
I hope I understood the question correctly.