A Day In The Life of a Tunnel Engineer #4

Today was an unusual one as it involved grappling with the question ‘Does that tunnel need closing?’

Technically I’ve done this many times before, every tunnel inspection ends with someone ticking the box marked ‘Tunnel is safe’ on their big compliance sheet, however as you may have guessed from that description of the it’s normally as much for form’s sake as anything else. Certainly it’s very rare to actually find anything of note, all the old Victorian tunnels that were built badly have long since fallen down (leaving only the good ones) and the newer stuff just doesn’t go wrong as there is so little to go wrong.

This time however we received a nice report saying a tunnel had moved a worrying large amount, hasn’t actually stopped moving and is right on the edge of the trigger level marked “COLLAPSE”. The question therefore was should the client close the tunnel or should they throw a load of realtime monitoring at it to try and work out exactly what is going on. We did in the end recommend the latter, if the client had in fact closed this tunnel I suspect it would have made the national news. In fact given the site and it’s history it may even have made it further afield, though who can fathom the world of the news editor’s priority list?

As always with these bits of news I feel I probably can’t go into detail as the company involved would not be impressed, which is something of a shame as it’s the kind of story I just know would make a nice splash in the tabloids and thus get me my few minutes of blogging fame. Ah well.

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