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[cem_devecioglu]

some piece of metal to increase their height wont cost 50m £ pound..  :-/

I have passed your quotation on to HM Government and you start next Tuesday. Please bring a welding torch and 368 lengths of 10m steel.

 

seriously that job can be done with very minimal costs in my country that you cant imagine.. 8-)

and if thats a job offer,  I will need health insurance

in oil wells we use #1 quality steel for drilling for the equipment and never costs like that.. I'm an engineer (have a degree) in the related field

The problem here, Cem (as I understand it), is that the weight of the windmills is causing them to sink, so adding extra metal will have little effect and may, indeed, exacerbate the problem. I would guess (as a layman, not as a civil engineer) the only thing they can do is to sink piles down many, many metres into the seabed, fill them with concrete, and then secure the windmills to these new foundations. All-in-all, I think that would be costly. 

But, as I say, I'm only guessing.  :-/

Good and very safe approach Nickbat

this technique is used for bridges with a high cost unfortunately..

imo, I wouldnt plan a very long period for those mills..

as the tidal forces and corrosion will anyway effect them.. a simpler solution will be a wider plate surface carrying the top and distributing the weight will be adequate and some added length for the planned life 

I bow to your superior knowledge on this one, Cem. 

Thanks Nickbat    

[kevinminton]

"Wind turbines around the UK are sinking into the sea because their foundations are suffering from subsidence"

 

Don't worry, it'll only take £50m to fix 'em...

http://www.[highlight]yachtingmonthly[/highlight].com/news/450388/turbines-sinking-fear

Cancel my subscription to New Civil Engineer and all that. Yachting Monthly is definitely the new source of authoritative and impartial reporting on wind turbines.
K

[Nickbat]

"Wind turbines around the UK are sinking into the sea because their foundations are suffering from subsidence"

 

Don't worry, it'll only take £50m to fix 'em...

http://www.[highlight]yachtingmonthly[/highlight].com/news/450388/turbines-sinking-fear

Cancel my subscription to New Civil Engineer and all that. Yachting Monthly is definitely the new source of authoritative and impartial reporting on wind turbines.
K

Why the sarcasm?

It is either true or it is not, wherever it is reported.
 

[kevinminton]

It's about hobgoblins. I suggest that before we run away, react, or even think about it, we assess who started the story about hobgoblins, and who brought it to us. Some people we listen to. Others we ignore because it is plain that they have a vested interest in frightening us.

[Nickbat]

It's about hobgoblins. I suggest that before we run away, react, or even think about it, we assess who started the story about hobgoblins, and who brought it to us. Some people we listen to. Others we ignore because it is plain that they have a vested interest in frightening us.

Still don't understand the point you're making, but maybe I'm too thick. :-?

Hundreds of offshore wind turbines could be suffering from a design flaw that makes them sink into the sea.

Energy company engineers are urgently investigating the extent to which their offshore wind farms are affected, after flaws were discovered on a Dutch wind farm last autumn.

The problem could cost £50 million, said Renewables UK, the industry body that represents wind farm developers. It says that almost all of the 336 offshore turbines that have been erected could be affected as these were built to European standards now in question.

The problem arises in the concrete used to fix the turbine to its steel foundation. Shell found that some of the turbines at Egmond aan Zee, its Dutch wind farm, had moved a few centimetres. Centrica, owner of British Gas, and Dong Energy, the Danish wind group, admitted potential problems with some of their UK farms, but added that there was no safety or operational issue.

http://business.timesonline.co.uk/tol/business/industry_sectors/natural_resources/article7096654.ece

So who, exactly are the hobgoblins? Renewables UK, Shell, Dong Energy...?

I'm going to lie down in a darkened room...