Sky pool! 1

[MIStructE_IRE]

As much as this image looks like CGI, its not. Its just opened in London and appears to be made of 200mm thick acrylic. The span is about 14m and it consists of a 200mm thick acrylic slab spanning between upstand beams. These beams are 200mm thick acrylic x 3.3m high!

I’m still unsure as to why the compression zone of these incredibly slender upstand acrylic beams does not LTB itself into oblivion! I understand the concept of U-frame action in chunky steel bridges, but this seems to defy all understanding I have of structural behavior! Can anyone shed some light on this? Its very impressive!

Ps - for those wondering about redundancy, as I was, there are 2 No. steel cables beneath the slab..

 

[Ussuri]

"Transparent Aluminium" or "Transparent Aluminum"

Referencing Star Trek IV.

It clearly works.

I wonder what they do about rain water? Presumably the water level would increase during a storm event. I wonder if they have designed for the 2.55m water depth or if they have an overflow somewhere? and if it does overflow, where do they put it, through the down pipes and into the sewerage system?

Cleaning the outside will be fun job for someone.

 

[Tomfh]

I wonder if they have designed for the 2.55m water depth or if they have an overflow somewhere?

Within the building it's a regular pool edge, a few hundred mm above the water. So it can't build up more than that.

 

[KootK]

I'm not sure how those cables could hold up the actual pool.

I was thinking that, when required, the tendon springs would introduce enough sag into the tendon profiles that they could hold up the pool as catenarys. I don't know enough about the anchorage situation to know if that's realistic though. And your water tightness theory certainly seems reasonable to me as well.

 

[KootK]

Are we thinking that there's a movement joint at every one of those yellow rectangles?

 

[rb1957]

yellow rectangles ? = red clouds ??

another day in paradise, or is paradise one day closer ?

 

[KootK]

yellow rectangles ? = red clouds ??

The yellow rectangles within the red clouds.

 

[Harbringer]

The yellow rectangles within the red clouds.

I think just at the yellow rectangles each end of the acrylic. Acrylic has a high coefficient of thermal expansion.

 

[phamENG]

I think they are calling out movement bearings at all 4 (or, perhaps, 8) points. When then acrylic expands or contracts, you want the whole of the stainless tubs on either side to move with it to maintain a watertight seal. If the stainless is restrained at both ends and the acrylic contracts, it could pop the seal between the two.

 

[StrucPEng]

Timely post from Eckersley O'Callaghan on the sky pool design

https://www.eocengineers.com/en/projects/sky-pool-246

 

[LittleInch]

The bottom slab thickness is quoted at 380mm, not 200 as in the OP. Might make a difference.

I can see the sway and movement working on sliding supports, but wasn't quite so sure about if one building went up or down.... Looks like a chance of a leak there alright.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[kingnero]

I'm travelling regularly to London. I was going to mention that I'd check out this sky pool,
but seeing the website

https://www.embassygardens.com/sky-pool/

I believe my pockets aren't deep enough to visit this pool...
It is however right south of the Thames at the center of London, so most likely visible from the public streets. I'll take a zoom lens with me next time...

Have a look at that site, the water top level sits at about 80 cm below the top of the acrylic walls (2 ft 8")

 

[phamENG]

You mean you can't swing 1,500,000 USD for a 2 bedroom apartment on an engineer's salary?

 

[kingnero]

Thanks phamENG for confronting me with reality, and thanks to whomever starred that post for depressing me even further...

 

[IRstuff]

You mean you can't swing 1,500,000 USD for a 2 bedroom apartment on an engineer's salary?

That sounds like a great deal! There are condos in SF that go for that amount without the pool and glitzy women

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

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