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Originally Posted by You Need a Thneed
You need a different sized TBM for every sized project you try to build.
Also, the cost of the machine isn’t the big cost. The cost of setting it up and operating it is the big cost.
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I really just wanted to make a penetrator joke.
But you could absolutely use the same tunnel boring machine more than once. All the tunnels would just be the same size. And having local expertise would almost certainly make set up and operations cheaper.
Quote:
Originally Posted by Fuzz
The ground under downtown isn't really great for tunneling. They are also incredibly expensive. I don't think just buying a machine then means cheap tunnels everywhere.
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Not at all. Tunnels are wicked expensive. And the first few wouldn't be cheaper if you embarked on that plan. But once you had local expertise and a paid for tunnel boring machine the next bunch would be cheaper. Not cheap, but less incredibly expensive.