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Old May 26th, 2011, 12:12 AM   #1681
chewys
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Quote:
Originally Posted by Miami High Rise View Post
Is everything really that rusty or is it that the dirt is red? Everything looks so dirty.
The dirty look is mainly due to the top down method being adopted for the basement construction. The first part of the work is to drill foundation piers, insert steel cages and pour concrete. Along with that, steel pipes or H-section are partially embedded to piers. These will form the rusty columns that you see rising to the ground level. The ground beams and slab will then be constructed. Next comes the excavation from the ground level to first basement level. This cycle is repeated to the lowest basement level. Formwork and flaseworks are not really required for the beams and slabs construction, and they can be supported directly by the underneath earth. This is the reason why the beams and slabs do not have the cleaner finish that's normally comes off the normal formworks. .

Last edited by chewys; May 26th, 2011 at 12:18 AM.
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Old May 26th, 2011, 12:25 AM   #1682
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Quote:
Originally Posted by Silly_Walks View Post
It's named after the Arnold Schwarzenegger movie.





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Old May 26th, 2011, 07:32 AM   #1683
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By 1788111





Amazing deep hole
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Old May 26th, 2011, 08:46 AM   #1684
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wow they are going much more deeper here (and still taking soil out of the holes)
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Old May 26th, 2011, 02:43 PM   #1685
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Its actually very cool to see a different construction process, makes it very interesting to watch
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Old May 26th, 2011, 03:07 PM   #1686
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wow...holes look so amazing ..............
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Old May 26th, 2011, 03:16 PM   #1687
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instead of making 100"s of thin piles in the ground looks like their making 12 thick ones
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Old May 26th, 2011, 03:50 PM   #1688
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nice hole
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Old May 26th, 2011, 09:46 PM   #1689
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yes, nice hole indeed.
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Old May 27th, 2011, 05:22 AM   #1690
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Hi all.

I am still dumbfounded they are digging piles by hand in 2011.
Seems like a make work project for the workers ...

A joke, of course but there must be some major rules in place to protect underground lines.

That said, this is very interesting to see as Eastern posted.
Seems pretty obvious now that they are digging down deep enough to call these piles.


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Old May 27th, 2011, 05:40 AM   #1691
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I don't see what type of machine could dig easily in a hole that is not so large. The crane hand can damage the walls of the pit.
As it's not very usual to see this type of hole I am guessing that there are not really any existing digging machine that would be suitable for this size.
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Old May 27th, 2011, 05:57 AM   #1692
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A short clip of the manual labour digging process.

The buffer might be a bit slow if you're outside of China, and if you are watching it during China's internet peak time.

http://v.youku.com/v_show/id_XMjcwMTE2ODYw.html
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Old May 27th, 2011, 06:20 AM   #1693
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Thanks for the video Scion. Quite an interesting view. Those holes look quite big.
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Old May 27th, 2011, 08:14 AM   #1694
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Such digging method can save budget but require solid soil.Soil condition in Shenzhen and Hong Kong is quite good.
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Old May 27th, 2011, 09:58 AM   #1695
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One small question: Why does SkyscraperPage.com list this tower as "On Hold"?
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Old May 27th, 2011, 10:10 AM   #1696
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Because they're way behind; it's a dead forum compared to here
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Old May 27th, 2011, 10:25 AM   #1697
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Thanks for pointing that out.
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Old May 27th, 2011, 01:31 PM   #1698
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Quote:
Originally Posted by YannSZ View Post
I don't see what type of machine could dig easily in a hole that is not so large. The crane hand can damage the walls of the pit.
As it's not very usual to see this type of hole I am guessing that there are not really any existing digging machine that would be suitable for this size.
I know one... that freaking device from The Core movie or whatever it is
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Old May 28th, 2011, 05:24 AM   #1699
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Hi all.

Quote:
Originally Posted by YannSZ View Post
I don't see what type of machine could dig easily in a hole that is not so large. The crane hand can damage the walls of the pit.
As it's not very usual to see this type of hole I am guessing that there are not really any existing digging machine that would be suitable for this size.
Hi Yann.

The norm would be to do the piles before any excavation (like they did for the podium columns) and fill them with concrete only to the level they will dig down to later.

As for the pile size, I think the biggest 7 pairs done for the Chicago Spire are close to half of the diameter of these. No time to google it, but I wouldn't be surprised if there are pile rigs that could do these - at substantially more expense for sure.

Two thoughts on the hand method :
- As I posted prev. - there may be sensitive lines underground and major regs in place to protect them
- the soil may not be appropriate to do big piles using 21st century technology.


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Old May 29th, 2011, 03:01 AM   #1700
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Quote:
Originally Posted by Fury View Post
Hi all.



Hi Yann.

The norm would be to do the piles before any excavation (like they did for the podium columns) and fill them with concrete only to the level they will dig down to later.
There are only a few reasons that I can think of that wold necessitate some kind of change in piling technique this late in the game. One is that the geology of the location in terms of soil or bedrock is different than what is expected, such as when some solifluction is detected over time. Another would be some previous underground structures that were missed during survey, as you are suggesting below. The other would be a significant change in the overall design plan that affects the load bearings different parts of the pilings or footings of the foundation.

Quote:
As for the pile size, I think the biggest 7 pairs done for the Chicago Spire are close to half of the diameter of these. No time to google it, but I wouldn't be surprised if there are pile rigs that could do these - at substantially more expense for sure.

Two thoughts on the hand method :
- As I posted prev. - there may be sensitive lines underground and major regs in place to protect them
- the soil may not be appropriate to do big piles using 21st century technology.


Ray.
It would be great if some kind of redesign is going on, and that the architecture of this building would be made much more pleasing to the eye. CS would be a great model for a redesign of this building. I've always thought that if not built in Chicago, this design would do very well just about any where in the world. Wouldn't something like these be great to see instead of the current horrid design on SZ skyline:

http://imageshack.us/f/169/spirexk7.jpg/
OR
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