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2006-07-19 Home Front: Politix

Romney moves to oust Big Dig chief as tunnel repairs continue

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Posted by Fred 2006-07-19 00:00|| || Front Page|| [1 views since 2007-05-07] Top

#1 Romney was on the news last night, on a cherry picker right at the mounting plates. He explained how to recognize the signs of bolt failure, and how they were going to solve the problem by backing up the epoxied bolts with expansion bolts. He came across as competent and in charge.

The idea of gluing bolts into an oversize hole, with the epoxy mixed in the hole as the bolt is inserted, seems ludicrous especially if you expect it to last a century. The new design involves a bolt which expands into an oversized pocket at the bottom of the hole. I would have thought they would have used that obvious approach in the beginning, but apparently there are a lot of tunnel ceilings in Boston and elsewhere that use epoxied bolts. The unusual part of the Big Dig design was the weight of the ceiling panels.

Posted by KBK 2006-07-19 13:56|| 2006-07-19 13:56|| Front Page Top

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