daily menu » rate the banner | guess the city | one on oneforums map | privacy policy | DMCA | news magazine | posting guidelines

Go Back   SkyscraperCity > World Development News Forums > General Urban Developments > DN Archives



Global Announcement

As a general reminder, please respect others and respect copyrights. Go here to familiarize yourself with our posting policy.


Reply

 
Thread Tools
Old July 24th, 2008, 10:33 PM   #6821
buildmilehightower
NANI Luis Almeida Cunha
 
buildmilehightower's Avatar
 
Join Date: Mar 2008
Location: London
Posts: 3,421
Likes (Received): 240

Quote:
Originally Posted by doubleno7 View Post
This is so frustrating! I want to see this building start going up. It seems like they've been doing the foundation and sublevels for years! Anyone know when the build should start to really rise?
You're pretty new but you have to be patient besides there's finally some visible progress going on. Uptill now have been purely invidible progress. Very happy to see those diggin going on now, progress going around the circle core finally!

Do these 2 part videos show top down construction? if yes then what minute? http://www.youtube.com/watch?v=4v5LWchzlxE

Can someone do me a favour and find me a good top down construction video?
buildmilehightower no está en línea   Reply With Quote

Sponsored Links
Old July 25th, 2008, 12:14 AM   #6822
drew.magoo
Registered User
 
drew.magoo's Avatar
 
Join Date: Jun 2008
Location: Houston, Rolla
Posts: 468
Likes (Received): 17

woot, were finally seeing some action!

i actually agree with BMHT, i still dont completely understand the concept of the top-down method
ive watched the videos, but i dont know the difference between that and the regular method
drew.magoo no está en línea   Reply With Quote
Old July 25th, 2008, 12:46 AM   #6823
backupcoolmen
BANNED
 
Join Date: Jul 2008
Location: Charlotte
Posts: 173
Likes (Received): 6

Construction

when will work begin above ground
__________________

Zefire liked this post
backupcoolmen no está en línea   Reply With Quote
Old July 25th, 2008, 02:04 AM   #6824
Spearman
NWO Henchman
 
Spearman's Avatar
 
Join Date: Aug 2005
Location: Oslo
Posts: 1,018
Likes (Received): 638

Quote:
Originally Posted by doubleno7 View Post
This is so frustrating! I want to see this building start going up. It seems like they've been doing the foundation and sublevels for years! Anyone know when the build should start to really rise?
You forget how big this monster is (they need to dig deep to keep her stable).
__________________
politics n.pl. [From Gr. poly-, many and ticks, degenerate, blood-sucking parasites that transmit disease]

A bureaucrat is a device for turning coffee into frustration.
Spearman no está en línea   Reply With Quote
Old July 25th, 2008, 02:20 AM   #6825
ljvdb
Registered User
 
Join Date: Feb 2008
Posts: 15
Likes (Received): 0

Quote:
Originally Posted by buildmilehightower View Post
Do these 2 part videos show top down construction? if yes then what minute? http://www.youtube.com/watch?v=4v5LWchzlxE

Can someone do me a favour and find me a good top down construction video?
Video two http://www.youtube.com/watch?v=q-hDTX-Qgd8 demonstrates top-down construction pretty well from 0:20 to about 1:05

Basic idea in top-down construction:
1) Install piles throughout your site
2) Pour top level floor, resting on the piles on top of the dirt at the surface
3) Excavate one level underneath the level above, pour new floor tied into the piles.
4) Repeat step 3 until you reach the lowest level.
5) Done building your below ground levels

Normal construction of sub grade levels:
1) Excavate the whole site, resulting in a big pit
2) Install foundation and pour lowest floor at the bottom of your pit
3) Erect columns that will hold up the level above and pour next level
4) Repeat 3 until your reach the surface
5) Done building your below ground levels

It has been just over a year since they started this project and they are pretty close to completing the foundation works. One year is not unusual for a large building like this.

Remember just over a year ago, first equipment arriving on site: http://www.skyscrapercity.com/showth...2&page=57#1138

Last edited by ljvdb; July 25th, 2008 at 02:30 AM. Reason: Add link to frist signs of construction
ljvdb no está en línea   Reply With Quote
Old July 25th, 2008, 03:43 AM   #6826
Dmbphish13
Registered User
 
Join Date: Jan 2007
Posts: 6
Likes (Received): 0

Quote:
Originally Posted by ljvdb View Post
Video two http://www.youtube.com/watch?v=q-hDTX-Qgd8 demonstrates top-down construction pretty well from 0:20 to about 1:05

Basic idea in top-down construction:
1) Install piles throughout your site
2) Pour top level floor, resting on the piles on top of the dirt at the surface
3) Excavate one level underneath the level above, pour new floor tied into the piles.
4) Repeat step 3 until you reach the lowest level.
5) Done building your below ground levels

Normal construction of sub grade levels:
1) Excavate the whole site, resulting in a big pit
2) Install foundation and pour lowest floor at the bottom of your pit
3) Erect columns that will hold up the level above and pour next level
4) Repeat 3 until your reach the surface
5) Done building your below ground levels

It has been just over a year since they started this project and they are pretty close to completing the foundation works. One year is not unusual for a large building like this.

Remember just over a year ago, first equipment arriving on site: http://www.skyscrapercity.com/showth...2&page=57#1138
Actualy from what my structural engineer friend tells me. They will excavate about 10' down and then pour the grade level slab. Then continue the process till they are done
Dmbphish13 no está en línea   Reply With Quote
Old July 25th, 2008, 10:47 AM   #6827
buildmilehightower
NANI Luis Almeida Cunha
 
buildmilehightower's Avatar
 
Join Date: Mar 2008
Location: London
Posts: 3,421
Likes (Received): 240

is top down method done for the core then? because they've first installed beams in the perimeter, then poured rings of concrete at the same time as digging, and have been progressing down the core.

Or is the top down cnstruction gonna be only done for surrounding of the core?

(question for surrounding of the core. If they pour whole of the site accept the core on the ground first then how do they pour the other levels below it? Or do they pour from bottom up?)
buildmilehightower no está en línea   Reply With Quote
Old July 25th, 2008, 12:10 PM   #6828
dachacon
Registered User
 
dachacon's Avatar
 
Join Date: Jun 2008
Location: Los Angeles
Posts: 834
Likes (Received): 164

Quote:
Originally Posted by ZZ-II View Post
the tower is on shedule . this construction method (top-down) is even faster than a normal method.
how is it faster?
it seems that it would take longer, but i dont know much about foundation construction can you please explain.
thnx in advance
dachacon no está en línea   Reply With Quote
Old July 25th, 2008, 01:16 PM   #6829
nezzybaby
Look at my shiny ball
 
nezzybaby's Avatar
 
Join Date: Jan 2005
Location: Bristol
Posts: 8,767
Likes (Received): 2841

^The core can begin construction whilst the basement is being dug. That is how it is quicker.

The speed of this is very very fast, the entire piling operations have been completed within one year. THAT IS FAST. I know people on this forum like to complain that things are taking a while, but you cannot do groundworks any quicker. Piling operations take between 1 and 3 years, I know a lot of you only watch this building rise, or have only started to watch construction of buildings in the last year or so. But get used to it, this is how long piling operations take for a supertall tower. Stop moaning and enjoy the ride. Or dissapear for 6 months and come back when things start moving at the rate you want !!
__________________
"The thing that really annoys right wingers is: facts are left wing"
Graham Linehan
nezzybaby no está en línea   Reply With Quote
Old July 25th, 2008, 01:23 PM   #6830
harryc
Registered User
 
harryc's Avatar
 
Join Date: Sep 2007
Location: Oak Park, Il
Posts: 2,099
Likes (Received): 375

Quote:
Originally Posted by buildmilehightower View Post
is top down method done for the core then? because they've first installed beams in the perimeter, then poured rings of concrete at the same time as digging, and have been progressing down the core.

Or is the top down cnstruction gonna be only done for surrounding of the core?

(question for surrounding of the core. If they pour whole of the site accept the core on the ground first then how do they pour the other levels below it? Or do they pour from bottom up?)

No the core is an example of traditional bottom up work, it is round eliminating the need for the extensive cross bracing normally seen.

In a traditional site they would now weave/pour the mat, create the central elevator core, and once that core had risen aboive grade dig out the rest of the pit bracing the walls against the core.

In top down the ground floor will be poured first and the FLOOR will be the bracing needed to keep the walls apart as the basement is excavated.

none of this .... (111 W Wacker)


more like this ..... (Block 37 ) ( photo from PHerek )
__________________
Harry C --- Picassa ---- Web Shots

“War is where the young and stupid are tricked by the old and bitter into killing each other.”

--Niko Bellic

Last edited by harryc; July 26th, 2008 at 04:33 AM.
harryc no está en línea   Reply With Quote
Old July 25th, 2008, 04:46 PM   #6831
Westyguy
Registered User
 
Join Date: Mar 2006
Location: South Coast NSW
Posts: 1,575
Likes (Received): 324

So from what i have been reading and what I've understood is that the Spire should be above ground level 12 months from now (July 2009)?

Is this correct?
Westyguy no está en línea   Reply With Quote
Old July 26th, 2008, 03:59 AM   #6832
harryc
Registered User
 
harryc's Avatar
 
Join Date: Sep 2007
Location: Oak Park, Il
Posts: 2,099
Likes (Received): 375

July 25 - Am

From above



higer res
2007 series
2008 Q1 series
2008 Q2 series
2008 Q3 series

Building and shoring the soil retention walls - then burying them.


[IMG] [/IMG]



Cut to size


[IMG] [/IMG]

The screen-pipe still waits.




Anyone know what this is ?

CAUTION: DUST FROM DRY MATERIAL CONATINS SILICA-DO NOT BREATHE THIS
DUST-MAY CAUSE LUNG INJURY (sILICOSIS) FOLLOW osha SAFETY
AND HEALTH STANDARDS FOR CRYSTALLINE SILICA (QUARTZ)

(gravel ?)

a much smaller pipe in the big caisson top.
Wed




Some more drilling


Inside the Wall



The wall runs along Secant...

... and Slurry
__________________
Harry C --- Picassa ---- Web Shots

“War is where the young and stupid are tricked by the old and bitter into killing each other.”

--Niko Bellic
harryc no está en línea   Reply With Quote
Old July 26th, 2008, 04:04 AM   #6833
harryc
Registered User
 
harryc's Avatar
 
Join Date: Sep 2007
Location: Oak Park, Il
Posts: 2,099
Likes (Received): 375

July 25 - AM 2

















Full size


.
__________________
Harry C --- Picassa ---- Web Shots

“War is where the young and stupid are tricked by the old and bitter into killing each other.”

--Niko Bellic

Last edited by harryc; July 26th, 2008 at 04:19 AM.
harryc no está en línea   Reply With Quote
Old July 26th, 2008, 04:14 AM   #6834
Msradell
Always looking up
 
Msradell's Avatar
 
Join Date: Oct 2007
Location: Louisville, Kentucky
Posts: 1,772
Likes (Received): 209

They spend more time digging up and reburying caissons than they do anything else! What purpose is there for keeping them buried? It certainly wastes a lot of time and effort.
__________________
"Written using Dragon Naturally Speaking"
I've learned that depression is merely anger without enthusiasm.
Msradell no está en línea   Reply With Quote
Old July 26th, 2008, 04:19 AM   #6835
Fury
Proudly Canadian
 
Join Date: Mar 2006
Posts: 2,059
Likes (Received): 350

- Keeping them buried keeps the site clear to move around.

Hi Harry.

Thanx for your excellent updates keeping us all informed.

The bags look the same as the ones used for bulk sandblast sand.

Silica sand is used as sandblast sand.

I wonder is there anything metal they have to coat or paint soon ? They would sandblast to bare metal before priming or coating.

__________________
Burj Khalifa - The Greatest Structure of our Time !!

Last edited by Fury; July 26th, 2008 at 04:31 AM.
Fury no está en línea   Reply With Quote
Old July 26th, 2008, 05:07 AM   #6836
harryc
Registered User
 
harryc's Avatar
 
Join Date: Sep 2007
Location: Oak Park, Il
Posts: 2,099
Likes (Received): 375

Quote:
Originally Posted by Fury View Post
- Keeping them buried keeps the site clear to move around.

Hi Harry.

Thanx for your excellent updates keeping us all informed.

The bags look the same as the ones used for bulk sandblast sand.

Silica sand is used as sandblast sand.

I wonder is there anything metal they have to coat or paint soon ? They would sandblast to bare metal before priming or coating.

Thx - probably the bridge ramp I was standing on
__________________
Harry C --- Picassa ---- Web Shots

“War is where the young and stupid are tricked by the old and bitter into killing each other.”

--Niko Bellic
harryc no está en línea   Reply With Quote
Old July 26th, 2008, 01:19 PM   #6837
friendsofthecity
Registered User
 
Join Date: Mar 2007
Posts: 4,929
Likes (Received): 690

From the caution notice on the bags,what will happen to the silica during the sandblast that enters into the surrounding environment? We should be cautious of the surrounding too.

Well, Good update!
friendsofthecity no está en línea   Reply With Quote
Old July 26th, 2008, 03:54 PM   #6838
mgk920
Nonhyphenated-American
 
mgk920's Avatar
 
Join Date: Apr 2007
Location: Appleton, WI USA
Posts: 2,583
Likes (Received): 68

Quote:
Originally Posted by friendsofthecity View Post
From the caution notice on the bags,what will happen to the silica during the sandblast that enters into the surrounding environment? We should be cautious of the surrounding too.

Well, Good update!
It'll settle out of the air as dust and the first rain will mix it into the soil. Quartz/silica does nasty things to the lungs when it is ground into a dust, whereas it is about as benign as can be when it is in larger pieces (like sand, rocks, window glass and so forth).

When sandblasting, containment systems are often set up to collect as much of that dust as possible.

Mike
mgk920 no está en línea   Reply With Quote
Old July 26th, 2008, 05:46 PM   #6839
friendsofthecity
Registered User
 
Join Date: Mar 2007
Posts: 4,929
Likes (Received): 690

Thank you, Mike for the insight. Meaning, silica are relatively harmless after the first rain.During sandblasting, I think an artificial showering rain or sprinklers can be of great help to stop its widespread movement in the surroundings.
friendsofthecity no está en línea   Reply With Quote
Old July 26th, 2008, 08:09 PM   #6840
Fury
Proudly Canadian
 
Join Date: Mar 2006
Posts: 2,059
Likes (Received): 350



It's frigin sand ...

When you blast it's dusty - no different than a windy day ...

Can't let moisture get to a freshly blasted surface - it will rust instantly - must prime or coat right away.
__________________
Burj Khalifa - The Greatest Structure of our Time !!
Fury no está en línea   Reply With Quote


Reply

Tags
chicago, santiago calatrava, spire, tallest, tower

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Related topics on SkyscraperCity


All times are GMT +2. The time now is 11:20 PM.


Powered by vBulletin® Version 3.8.11 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions Inc.
Feedback Buttons provided by Advanced Post Thanks / Like (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

SkyscraperCity ☆ In Urbanity We trust ☆ about us | privacy policy | DMCA policy

Hosted by Blacksun, dedicated to this site too!
Forum server management by DaiTengu