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by RandallBrown
2444 days ago
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The TBM in the SR99 tunnel is also the largest TBM in the world. It was a bit of a gamble, and it didn't pay off. Another huge problem was that it ran into a huge metal caisson that had been placed while surveying the area to build the tunnel... The contractors operating the machine "knew" about it, but still ran into it, which broke the machine for a long time. (They were given information that it was there, but they overlooked it.) |
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