Quote:
Originally Posted by ken0042
From the PDF in YNaT's link:
Each tunnel section is approximately 12 metres long and requires 850
cubic metres of concrete. It takes 80 trucks to deliver this concrete in
a 12-hour period. That works out to over 200 cubic metres of concrete
every day for the next 7 months.
I've heard a lot of people ask why it costs so much to "build a ditch." With 50 of these sections, that's over 42,000 cubic metres of concrete; or 4000 truckloads. Puts it into perspective.
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Yup, its a whole lot of concrete. Your math doesn't include the footings either (since they would be poured previously). All together there is 60,000 cubic metres of concrete for the project.
The excavation was, for the most part, done entirely into bedrock as well. Plus, tunnels have to be ventilated, lit, fire protection systems, and they still have to have storm drains, etc.
Anyway, here's the
May Update.