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Re: [PSUBS-MAILIST] concrete-steel diverlockout




The application being discussed here is a decomp chamber is it not? Some interesting cyclic loads. Kind of the "last chance" between you and eternity,... or the nursing home.

Not an expert here by any means, and this is purely speculation on my part but, this "feels" to me like a recipe for unexpected failure if built of steel and concrete composite.

I do love the idea of concrete for use as a fixed habitat. http://www.jul.com/ If I had a place to do this, I would consider it.

Joe





From: "Øystein Skarholm" <skarholm@gmail.com>
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] concrete-steel diverlockout
Date: Wed, 14 Feb 2007 13:03:00 +0100

Steel reinforced concrete have no problem taken up tension. A pressure
chamber could easily be made from concrete. There a huge condensate
tanks in a oil refinery not far from here. These tanks are made of
steel reinforced concrete.
All other reinforcement types then some sort of steel used for taking
up tension is still on the testing stadium.







On 2/14/07, Jay K. Jeffries <bottomgun@mindspring.com> wrote:



I didn't say anything about a sat system.   If I had the money for a
NuytSuit, wouldn't need a sub as a surface support vessel would be less
expensive to operate and could get more places faster.

R/J2





Respectfully,

Jay K. Jeffries

Andros Is., Bahamas



It is the mark of an educated mind to be able to entertain a thought without
accepting it.

  - Aristotle











-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Øystein Skarholm
Sent: Wednesday, February 14, 2007 2:56 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] concrete-steel diverlockout



A complete system for sat diving is a pretty large system. And again

if you thinking commercial then a submarine can no longer compete

against a surface vessel. The number of crew during sat diving is

large. And all of the requirements for backup and rescue is

tremendous.







On 2/14/07, clientes@tolimared.com <clientes@tolimared.com> wrote:

> A diver lockout is fine in steel ...

>

> But... i would sugest a concrete sub big enough to have a full sized
saturation

> dive facility (made of steel) inside.

>

> OR even better that has an advanced ROV or a JIM SUIT on board that makes

> saturation dives obsolete and enable you doing work much deeper with less
risk.

>

> Regards,

> Wilfried

>

> > Wilfried,

> >

> > While we have been talking about your submarine hull and Troll, these

> > structures depend on the great compressive strength of concrete.
Concrete

> > doesn't due well under tension (this is why concrete panels are
pre-stressed

> > and glass fibers are added to improve concrete's ability to resist
tension

> > loads). How would you propose using concrete to accommodate Carsten's

> > lock-out chamber that is also used for decompression (which would put
the

> > concrete deco pressure vessel under tensional load when the sub returns
to

> > the surface while still maintaining divers at some greater depth of

> > pressure)?

> >

> > R/Jay

> >

> >

> >

> > Respectfully,

> >

> > Jay K. Jeffries

> >

> > Andros Is., Bahamas

> >

> >

> >

> > It is the mark of an educated mind to be able to entertain a thought
without

> > accepting it.

> >

> >   - Aristotle

> >

> >

> >

> >

> >

> >

> >

> >

> >

> >

> >

> >

> >

> > -----Original Message-----

> > From: owner-personal_submersibles@psubs.org

> > [mailto:owner-personal_submersibles@psubs.org] On Behalf Of

> > clientes@tolimared.com

> > Sent: Tuesday, February 13, 2007 6:29 PM

> > To: personal_submersibles@psubs.org

> > Subject: [PSUBS-MAILIST] stress levels in a concrete submarine yacht
hull -

> > troll

> >

> >

> >

> >

> >

> >

> >

> > stress levels in a concrete submarine yacht hull - troll

> >

> >

> >

> > Oystein, this calculation takes my sub to a working depth of 606m -
anyhow i

> >

> > would not trust the viewports for such a depth... but this shows that
you

> > can

> >

> > get manageable stresslevels similar to TROLL in a concrete pressure hull

> > that

> >

> > goes to 606m with a yacht configuration - still not using spheres as

> > pressure

> >

> > hull as in deep diving configuration.

> >

> > Wilfried

> >

> >

> >

> >

>

>

>

>

>

>

>
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--

Best Regards

Øystein Skarholm

www.ubat.no









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--
Best Regards
Øystein Skarholm
www.ubat.no




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