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Old November 20th, 2009, 08:35 PM   #3281
Ajaypp
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Quote:
Originally Posted by kix111 View Post
yea what is it for?

from jamyan

image hosted on flickr
- I know it's a bit late to post a reply, but the machine is called a trench-cutter and it is used to excavate the retaining walls for deep excavations like the ST's foundations.

The actual cutter is the square frame suspended from the crane arm. The rest of the machine is basically a crane to raise and lower the cutter and move it around.

The cutter is equipped with twin excavating wheels which cut away the earth. The spoil is flushed out by pumping bentonite slurry into the trench. The reinforcement cage is lowered into the slurry and concrete is pumped in. Concrete is heavier than the slurry and displaces it, the latter being recovered and filtered for re-use.

Btw, the big drum is a spool for the hydraulic hoses which transfer power to the cutter heads.

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Old November 21st, 2009, 01:42 AM   #3282
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Quote:
Originally Posted by luci203 View Post
Well... for now is just a hole... people are not interested in pictures of holes...

aaam... scratch that... we want to see more pictures of holes...

Now thats the spirit.
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Old November 22nd, 2009, 05:18 AM   #3283
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I think the hole is actually quite deep, but just looks quite shallow because it is so huge, based on the size of the people beside the crane to the left.
certainly a big hole anyway!
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Old November 22nd, 2009, 11:22 AM   #3284
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I think they will eventually dig more because they made second concrete ring at the bottom, and i think its quite logic that the hole doesn't need ring on its bottom.
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Old November 22nd, 2009, 07:39 PM   #3285
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Quote:
Originally Posted by Ajaypp View Post
- I know it's a bit late to post a reply, but the machine is called a trench-cutter and it is used to excavate the retaining walls for deep excavations like the ST's foundations.

The actual cutter is the square frame suspended from the crane arm. The rest of the machine is basically a crane to raise and lower the cutter and move it around.

The cutter is equipped with twin excavating wheels which cut away the earth. The spoil is flushed out by pumping bentonite slurry into the trench. The reinforcement cage is lowered into the slurry and concrete is pumped in. Concrete is heavier than the slurry and displaces it, the latter being recovered and filtered for re-use.

Btw, the big drum is a spool for the hydraulic hoses which transfer power to the cutter heads.

Cheers!
Thanks for the explanation; very ilustrative.
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Old November 23rd, 2009, 03:27 AM   #3286
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Quote:
Originally Posted by Hightech Pro View Post
Well you said ST is more interesting.

I was referring to the actual progress, and you meant it in general... At the moment you are right, because nothing major is happening at BD anymore. But generally I was watching the BD very closely and were fascinated by the whole building process.

This is just not the case at ST at the moment, because for now it is not as interesting to watch than other towers, but it will definitely be in the future.
Good point
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Old November 23rd, 2009, 10:05 PM   #3287
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November 23 by jamyan
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Old November 23rd, 2009, 10:10 PM   #3288
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Huge progress
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Old November 23rd, 2009, 10:40 PM   #3289
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How deep are they now? Does anybody know? The machines are looking so tiny down there.
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Old November 24th, 2009, 08:32 PM   #3290
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Come on Severiano, do what you're best at

Sorry, I have been swamped at work lately and I don't work in Jin Mao anymore plus I am looking for a new house. When I get settled in my new house I will make my way over there to take pictures.
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Old November 25th, 2009, 09:04 AM   #3291
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from jamyan

image hosted on flickr

image hosted on flickr

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Old November 26th, 2009, 09:15 AM   #3292
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great to see the progress still running...
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Old November 26th, 2009, 02:47 PM   #3293
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So fast, wow.
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Old November 27th, 2009, 01:12 AM   #3294
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Yeah, its an really awesome pace. You can see progress on every new pic.
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Old November 27th, 2009, 02:50 PM   #3295
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Nice photos, and update! Making good time here.
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Old December 1st, 2009, 03:00 PM   #3296
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November 30 by jamyan
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Old December 1st, 2009, 04:40 PM   #3297
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its hard to tell from that pic, but i thing they are making yet another ring
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Old December 1st, 2009, 06:52 PM   #3298
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Quote:
Originally Posted by patrykus View Post
its hard to tell from that pic, but i thing they are making yet another ring
It does look like their digging deeper.
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Old December 1st, 2009, 09:49 PM   #3299
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Looks like they're about 25 meters deep... Incredible how fast!
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Old December 1st, 2009, 10:33 PM   #3300
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Quote:
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Looks like they're about 25 meters deep... Incredible how fast!
normal speed here in china!
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