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A comment on Elon Musk's first LA tunnel with free rides to kick off this summer. Parent comment

Re:Elon Musk's first LA tunnel with free rides to kick off t... by astrodust on Monday May 14, 2018 @03:46PM (#17068805)
A modern TBM is already exactly as you describe. They rotate pre-cast sections into place, then push off of them hydraulically to advance the machine. They don't stop digging.
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Re:Elon Musk's first LA tunnel with free rides to kick off t... by dgreensp on Friday May 18, 2018 @01:00PM (#17103014)
Innovating on the TBMs is definitely part of it; I don't know why you are concluding from a picture that it isn't? Boring smaller tunnels is also part of it.

You can read more here: https://www.boringcompany.com/faq/

I don't have an easy way to check your claims against Elon's, for example whether existing "modern" TBMs are fully electric as you claim, or run on fuel as Elon claims, and whether continuous tunneling is the norm or not.

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