This sounds dramatic!
A whistleblower claims that the Hammersmith Flyover is in a dangerous state due to corroded cables. The regular inspections apparently didn't uncover
any dangerous defects but now it's been brought to the attention of the public suddenly £10 million is being spent on renewing broken and corroded
The continuation of the story.
Here are a selection of views on the subject.
And here, perhaps most telling of all and an indication of greater problems with this method of construction. From the randompottins blogspot.
"I'm no enginer, but it sounds to me like the bridge is actually built employing the technique of post-stressed concrete, whereby cables are tightened
within the concrete after it is laid. Back in the early 1970s I was sharing a house up North with a couple of friends, one of whom was employed as a
technician on motorway construction. One day Steve came home not his usual carefree self, and told us that he had been testing the grout, a mixture of
cement and sand in water, that was used to surround cables embedded in concrete, in order to seal them from the elements. Finding a batch that was not
of the proper consistency - I think it was meant to be cement-rich - he had reported this, only to be told to let it go.
Steve explained that if the cables were not properly grouted and sealed, rainwater permeating through the concrete would cause them to rust, and you
might eventually have lumps of loosened masonry from bridges falling down on to the motorway.
I told him somewhat naievely that he ought to go to the press with his story. He replied that if he did that "it would be the end of my career in
civil engineering and construction". He was probably right. He won't mind me telling his story now, as last thing I heard he had gone into teaching
It all sounds a bit familiar.
edit on 8-3-2012 by Kester
because: (no reason given)