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Old April 20th, 2007, 07:08 PM   #421
Mosaic
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majestic structure!!!
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Old April 20th, 2007, 10:44 PM   #422
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rising very fast, great!
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Old April 20th, 2007, 11:11 PM   #423
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One of the most creative designs in the world.
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Old April 21st, 2007, 12:09 AM   #424
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Quote:
Originally Posted by DaSilWil View Post
About the gap in the building: they're going to close that when the two towers are connected at the top. The building is very complex with all the angles and they're not sure yet how the building will 'settle' itself. The building is erected in a slightly more upright angle than its final position due to its enormous weight. When everything is connected on top, the building is fixed at groundlevel.

As you can see on this last picture they are pouring concrete around the steel collumns of the construction. In this way, the collumns can take higher pressures. The entire construction works as a hull to create stability. The forces on the construction are not the same everywhere, so in some places the stability beams are closer together (there are more crosses in some places, view the renderings too).
Interesting, if you don't know much about construction, like me you never would have thought about things like this, and it all sounds so logical when you read it. It's a very interesting looking building that's also a very interesting enginering project.
It will be spectaculair when they are going to build the 'bridge', thanks for the pictures.
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Old April 21st, 2007, 12:19 AM   #425
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It's really incredible...
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Old April 21st, 2007, 04:51 AM   #426
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Does anyone know if they're going to have the giant TV screen covering a side of the structure as depicted in one of artist renderings?
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Old April 22nd, 2007, 04:03 AM   #427
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Looks like this building will indeed be finished for the Beijing 2008 olympics.
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Old April 22nd, 2007, 08:20 AM   #428
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Quote:
Originally Posted by DaSilWil View Post
About the gap in the building: they're going to close that when the two towers are connected at the top. The building is very complex with all the angles and they're not sure yet how the building will 'settle' itself. The building is erected in a slightly more upright angle than its final position due to its enormous weight. When everything is connected on top, the building is fixed at groundlevel.

As you can see on this last picture they are pouring concrete around the steel collumns of the construction. In this way, the collumns can take higher pressures. The entire construction works as a hull to create stability. The forces on the construction are not the same everywhere, so in some places the stability beams are closer together (there are more crosses in some places, view the renderings too).
Thanks, that's very helpful! I've read an article talking aoubt the buildings would be erected in more upright angle but not exactly mentioned the ground part...

BTW, two pics taken on apr 20th with my cellphone.

image hosted on flickr


image hosted on flickr
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Old April 22nd, 2007, 08:35 AM   #429
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great pics, thx
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Old April 22nd, 2007, 03:07 PM   #430
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Love the Design
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Old April 22nd, 2007, 04:09 PM   #431
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Building the cantilever section

Quote:
Originally Posted by TICONLA1 View Post
WOW now i know where all the world steel production is going. this one is truly a feat of engineering, and i'll bet there is at least 300.000 tons of fabricated steel in it. I can't wait to see the cantalever sections begin. also notice how the crossbracing near the the base is more intense at certain points for much higher load transfer, and the cantalever sections have long diagonal bracing as if they are "tied back" to the "masts". I'm guessing that they will just build it outward without any type of "backstay" system employed.
Once they reach the floor where the cantilever part begins, they will keep building the towers towards their roofs (the one higher than the other, because the roof of the total building has an angle as well). When they will have nearly reached the roofs, a sort of 'hanging' bridge will be built outwards from both towers towards eachother. When the bridges connect, they have actually constructed the ground floor of the entire cantilever part. From that point they can start building the floors. This method is easier than building enormous scaffolding from the ground ;-) It will be interesting to view the whole process of building such a cantilever section...
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Old April 22nd, 2007, 06:31 PM   #432
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it's growing up very fast..
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Old April 23rd, 2007, 01:19 PM   #433
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Quote:
Once they reach the floor where the cantilever part begins, they will keep building the towers towards their roofs (the one higher than the other, because the roof of the total building has an angle as well). When they will have nearly reached the roofs, a sort of 'hanging' bridge will be built outwards from both towers towards eachother. When the bridges connect, they have actually constructed the ground floor of the entire cantilever part. From that point they can start building the floors. This method is easier than building enormous scaffolding from the ground ;-) It will be interesting to view the whole process of building such a cantilever section...

That will be the most incredible site in Engineering history!
All you beijing forumers... please keep us well updated when the start work on the cantilever bridge!!!
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Old April 23rd, 2007, 06:39 PM   #434
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what an amazing project!
Thanks InfoAddict! Great update!
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Old April 23rd, 2007, 08:11 PM   #435
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The "legs" seem much more narrow than the renderings, i believe the cantalever sections start at the 38th floor, can anyone verifiy this ???
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Old April 23rd, 2007, 09:46 PM   #436
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You just can't expect to see the world's most expensive building being built with no less than a gravity-defying design like this. I like it very, very much.
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Old April 24th, 2007, 01:00 AM   #437
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starting to rise fast now!
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Old April 24th, 2007, 07:20 PM   #438
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Go up babe!!
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Old April 25th, 2007, 02:46 AM   #439
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comming along well.Will it be done by the oympics?
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Old April 25th, 2007, 06:25 PM   #440
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Quote:
Originally Posted by DaSilWil View Post
About the gap in the building: they're going to close that when the two towers are connected at the top. The building is very complex with all the angles and they're not sure yet how the building will 'settle' itself. The building is erected in a slightly more upright angle than its final position due to its enormous weight. When everything is connected on top, the building is fixed at groundlevel.

As you can see on this last picture they are pouring concrete around the steel collumns of the construction. In this way, the collumns can take higher pressures. The entire construction works as a hull to create stability. The forces on the construction are not the same everywhere, so in some places the stability beams are closer together (there are more crosses in some places, view the renderings too).
I imagine it's similar to how certain types of bridges are constructed. Stability has to be given to the huge forces of the tower loads until joined, then so much more pressure is taken away from the 2 ends of the structure after connecting. Any major stability problems (at worst collapsing) increase of course as the 2 ends climb higher.

Similar structural engineering techniques were inherited while building the Luxor Hotel and Casino in Las Vegas. Until the 4 sides connected at the very top, the risks grew as the walls grew.

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