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  #661  
Old Posted Feb 16, 2017, 9:51 PM
JK47 JK47 is offline
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Originally Posted by HomrQT View Post
What are slosh damper containers usually made of? Would welding pieces of metal together to create the container not make it sealed against leaks? Also what are your thoughts on the tuned mass damper for Taipei 101?

According to the link the tank would likely be made of concrete. The simple fact though is that you're dealing with water and cost. Concrete is cheap whereas constructing a tank with copper or stainless steel is not and water will eventually corrode both of those alternatives. Everything that holds water will, given sufficient time, leak.

Lastly, a tuned mass damper is a mechanical damper which is essentially what was described as an alternative (a mechanism for absorbing shock mechanically).
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  #662  
Old Posted Feb 16, 2017, 11:00 PM
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According to the link the tank would likely be made of concrete. The simple fact though is that you're dealing with water and cost. Concrete is cheap whereas constructing a tank with copper or stainless steel is not and water will eventually corrode both of those alternatives. Everything that holds water will, given sufficient time, leak.

Lastly, a tuned mass damper is a mechanical damper which is essentially what was described as an alternative (a mechanism for absorbing shock mechanically).
Thanks. I like the concept that the engineers of Tapei 101 implemented, which takes away the issues with dealing with water and provides a single point of maintenance over time if that damper needs to be checked or repaired.

I can't help but let my mind wander with the slosh damper, like a layer of aluminum creating a barrier with the concrete which is relatively cheap and fairly resistant against corrosion. In time if there's any issue with the aluminum barrier, drain the tank, install a new barrier and refill the tank. Admittedly a single physical damper that wouldn't need attention for a very long time sounds more desirable even if the upfront cost is more.
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  #663  
Old Posted Feb 20, 2017, 4:03 PM
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^The unit count hasn't changed.
I think it is indeed more likely that it hasn't changed and the blurb I read had incorrect information/typo. However, there is also some possibility at this point that the developer made a change impacting the unit count and simply forgot to have you directly informed at least as of yet......
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  #664  
Old Posted Feb 21, 2017, 1:59 AM
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Feb 20


The hole is filled with water - sometimes clay laden water - to help keep the sides from caving in before the sleeve is driven down.






Spinning off the soil.
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  #665  
Old Posted Feb 22, 2017, 2:09 AM
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  #666  
Old Posted Feb 22, 2017, 2:09 PM
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What do they do with all that clay? Is it trucked off somewhere? Used for anything?
In the Quad Cities there's an artist who makes knick knacks out of Mississippi River clay (ibloom.com). I'm curious if good clay like that is going anywhere interesting. With all the Chicago construction, that is a lot of clay being mined.
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  #667  
Old Posted Feb 22, 2017, 8:23 PM
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What do they do with all that clay? Is it trucked off somewhere? Used for anything?
In the Quad Cities there's an artist who makes knick knacks out of Mississippi River clay (ibloom.com). I'm curious if good clay like that is going anywhere interesting. With all the Chicago construction, that is a lot of clay being mined.
We have a couple new beaches that need to be made to straighten out LSD, seems like a good place to start dumping excess earth.
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  #668  
Old Posted Feb 23, 2017, 5:49 PM
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I have it on good authority that Phase 1 will not have more than 800 units in it, so whatever source had it at 900 was incorrect. When I worked on it, the number was 792 so that is consistent with my last first hand information.
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  #669  
Old Posted Mar 9, 2017, 4:03 AM
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  #670  
Old Posted Mar 13, 2017, 6:17 PM
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Seems there was quite a large pour here over the weekend. Image from http://www.sloopin.com

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  #671  
Old Posted Mar 14, 2017, 6:08 AM
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Originally Posted by aaron38 View Post
What do they do with all that clay? Is it trucked off somewhere? Used for anything?
In the Quad Cities there's an artist who makes knick knacks out of Mississippi River clay (ibloom.com). I'm curious if good clay like that is going anywhere interesting. With all the Chicago construction, that is a lot of clay being mined.
It's soil, so the excavation contractor will typically haul it away and sell it to some other project. Clay like this can be used to cap landfills or other environmental remediation, etc. I don't think it compacts very well, so you typically wouldn't use it to backfill around foundations or for roadway grading. But it probably could be used for lakefill projects, golf courses, or other terraforming.

I assume artist-grade clays are probably mined for that purpose and kept free of impurities, not dredged up as spoil from a construction site... although artists are certainly free to get their clay from the bottom of a caisson if they wish...
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  #672  
Old Posted Mar 14, 2017, 3:18 PM
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...
I assume artist-grade clays are probably mined for that purpose and kept free of impurities, not dredged up as spoil from a construction site... although artists are certainly free to get their clay from the bottom of a caisson if they wish...
It'd be interesting for an artist to pitch the idea of furnishing a new building with clay artwork crafted out of the clay recovered from that building's caissons.
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  #673  
Old Posted Mar 18, 2017, 3:24 AM
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That's a wrap on the caissons.

03/17/17





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  #674  
Old Posted Mar 18, 2017, 8:10 AM
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That's a wrap on the caissons.
Were there air compressors on site to grind rock-socketed caissons? I dont recall seeing any in photos posted here.
Who's the general contractor? It will be great to see some vertical structure rising here soon!
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  #675  
Old Posted Mar 18, 2017, 8:56 AM
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Were there air compressors on site to grind rock-socketed caissons? I dont recall seeing any in photos posted here.
Who's the general contractor? It will be great to see some vertical structure rising here soon!
Apparently you don't always need compressors.

McHugh is the GC.

They have permits for the first 12-levels and for the tower crane.
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  #676  
Old Posted Mar 21, 2017, 4:31 AM
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It's sheeting time...

03/20/17






Rakers


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  #677  
Old Posted Mar 21, 2017, 6:14 AM
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Awesome. About a month till crane gets installed?
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  #678  
Old Posted Mar 21, 2017, 12:43 PM
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Awesome. About a month till crane gets installed?
Don't put a timeline on it They'll drive sheeting around the perimeter and the core. Then they've got to excavate the core area, build up the mat..... Just enjoy the process.
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  #679  
Old Posted Mar 21, 2017, 2:15 PM
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Don't put a timeline on it

An altogether silly thing to tell someone when in fact there very much is a - rather precise - timeline on it....
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  #680  
Old Posted Mar 21, 2017, 2:24 PM
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^^^ Yeah, but do project managers for private projects publish their schedules? And are those fixed in stone? The PM may have a date on his calendar for when the crane gets installed, but we don't have it.
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