6 ms·
> Rather than including a facility for assembling the tunnel lining (out of multiple segments) inside the TBM, complete rings are inserted at the insertion shaf
by morekozhambu 7y ago
> Rather than including a facility for assembling the tunnel lining (out of multiple segments) inside the TBM, complete rings are inserted at the insertion shaft, and the whole tunnel is jacked forward one segment at a time.
This seems inefficient.
- bluGill 7y agoLooks to me like they are looking at only going a short distance. I doubt you could get more than 100 meters like that, but if you only need 100 meters of tunnel it is probably cheaper because it is faster.