Steam & Excursion > ORHC Turntable 01-26-2023

damn, would appreciate another flip!!    forms being installed for what I call support spines.  I understand the pictured forms are one side of the form, steel reenforcing will then be built and the other side of the form built....then another concrete "pour".   would appreciate actual technical information.    Arlen

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I flipped it but TO won't let me attach it. Only 65 then 12KB.

TTTO.

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Lurch_in_ABQ Wrote:
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> I flipped it but TO won't let me attach it. Only 65 then 12KB.

I'll give it a try to see if it'll stay in the originally displayed size.

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How is this

ST2K

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Out

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MANY thanks to all for my "fix".   next time I will bring my camera versus this damn phone.   Arlen

Are you holding the phone upside down?.. just a guess
john

Good Morning, i'm hoping somebody can explain these "spokes" as, being a little thickheaded I guess, I don't understand their purpose.  I took the last of the above pictures and did some cropping just to try and get a better view of the outer end.  Still don't understand but defer to Omega Morgan and the people who designed this as I am sure they know what they are doing.  Possibly just additional support for the rail ring.  I tried cropping some more BUT the more I cropped, the grainier the picture became so I just stopped.



Edited 2 time(s). Last edit at 01/27/23 06:48 by Jsporseen.

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Great interesting progress.  Thanks for posting.  I'm positive you will get things straight.  Your much different than me I have no idea how you do it.
Blaine
American Fork

Looks like they are getting close to the point where the equipment will have to be lifted out.  That will be interesting to see in a video or tame-lapse view.  I only live 15 miles from there and wish I could be there to see the removal but don't know the schedule and can't just sit there and wait.  It appears that looking at where the maintenance pit is, this picture was taken from about where the crane will be located when it lifts the final large items out of the pit.  It looks as if if they are installing the spokes in a clockwise manner which will put the front end loader, etc., at the near edge of the pit in order to be lifted out.  Maybe I'm wrong but it seems logical to me.



Edited 1 time(s). Last edit at 01/27/23 07:00 by Jsporseen.

John.....I don't think I am holding it upside down.....the button I push is on the bottom, the lenses are on the top facing the thinger I am trying to photograph.  I think my best bet is to use my camera but I don't carry it with me all the time like I do with the phone.  I very much appreciate the flips and suggestions from TO members.   Arlen

For:  Jsporseen. 09:18,

If you will refer to the earlier pictures of the  center (tube) pilings
that were driven, you will see that they are very tall.

The cubical block in the center carries the massive weights of
the turntable and the locomotives.  But, the block is on top of
the center pilings.

The surrounding 'earth' is made up of old ( huge) accumulation of
discarded tree lumber from the days of the huge mill, processing plant
that was there.  That immense buildup of 'stuff' has no solid  components.
Its ALL soft and spongy, a huge area and a hundred feet deep, in places.

So, for the turntable and locos riding on the center  "concrete cube"....
the cube is on top of the long, driven pilings ---- and there is virtually no
side-support to keep the long pilings from swaying, and moving --- pushing
the soft ground-fill around.  

The steel pilings only have end-wise support --- what keeps them from
moving, side-to-side?

That center block is on top of the long steel pilings --- THEY WILL MOVE,
LATERALLY, UNDER THE MASSIVE WEIGHTS WHEN APPLIED.  

The surrounding earth/dirt/wood-scraps ( some decomposed) gives no
side support to the center pilings.  That whole soil area might's well be 
chocolate pudding, when it comes to side support.

So, how would you stop the center pivot block from moving, even 1-inch?

With over a million pounds on that center block, the chance for the unsupported
steel piling 'legs' to move, bow, lean or bend is a very real risk.

The TT is only a few inches short of the circular concrete pit-wall.
When those pilings start shifting under the immense weights of the TT,
 the only thing that limits how much the center pilings bow, is the pit wall.
NOT GOOD! With a million pounds leaning into the wall,  nothing can move,
once the wall & TT bind.

The new braces being added to the center, have their outer ends at the pit wall...
Look at the earlier pictures of all the pilings that were driven around the
circumference of that pit wall ----- now, it's clear that the engineering purpose
of  all those rim pilings that were driven, is two-fold: support for the outer ring-rail
& dolly wheels + motors, AND the 'new' lateral bracing added to the 'teetering'
center block.

They're ( the engineering firm) taking NO chances on that pudding-like earth
that occupies that whole area --- as support for the massive weights that
will be riding on that TT.

There can be NO lateral movement, or wobbling ( allowed by the pilings) of
the center bearing or it's cube-shaped support.  

The strongest secure bracing available for securement is strong structure
of the steel re-inforced rim wall and circular rail-support ring.

When rotating, that center bearing carries 90% of the locomotive weight +
the weight of the TT.

W.



Edited 6 time(s). Last edit at 01/27/23 11:45 by wcamp1472.

very helpful information Wes.....when you mention inches between the turntable bridge and wall...I am reminded of the Omega Morgan foreman showing me his two fingers less than an inch apart and saying that is the clearance he has between the two, maybe less.  tight!!!          Arlen

Agreeing with all of the above, I think this spoke job looks suspiciously like an afterthought.

Nah .... always part of the plan. The arrangement maintains the ability of water to soak in; thus we don't have to pay stormwater fees.  Or something like that.
-dc

"dcautley's" answer really explains the spokes to me, thanks.  I see them as a regular 100% covered concrete floor that has instead been scrunched together into narrower but thicker sections.  Thus, concentricity between the pivot and rim rail/wall is maintained, while natural drainage can still occur as described.  

This discussion brings to mind something called the "Euler critical load for compressed slender columns." But that's all I temember, so it might not be germane.

I do believe that Euler's Critical Load is very germane. see; https://en.wikipedia.org/wiki/Euler%27s_critical_load for more info. Diagram from website is enclosed.

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Thank you, very much ...
For Eulers' Critcal Load information 

W.