Work site looked empty today. Should we start worrying?
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Haha
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Tower crane?? They still have roughly 15 feet to excavate.
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Based on the site plan the lowest garage level is 52.3' down. Not sure if they are there yet.
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They were busy at the site today. Still digging by the looks of it.
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I think they are using 2 x 12's to shore up the sides. If that's the case, it looks like they are at the 45 to 46 foot mark with about 6 feet to go.
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A permit was filed today for lane closures to install the tower crane. May 13 through May 16 is the date of the installation.
https://www.austintexas.gov/devrevie...erRSN=11503108 A permit was also filed for a "mat foundation" concrete pour May 6 through May 9. The Google tower had a mat foundation. https://www.austintexas.gov/devrevie...erRSN=11503085 |
I'm no expert but if they are placing concrete I'm assuming they are at the bottom of the excavation
Photo link attached http://m.imgur.com/pYuQI5b |
That seems strange. I don't see any rebar that would be used in a mat foundation and there are no caissons (yet).
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Looks like a "mud slab." Because the excavation terminates in this highly expansive shale soil, they immediately cap it with 3 to 4 inches of low strength concrete to protect it from the elements during construction. Otherwise the shale could swell tremendously. They just penetrate the mudslab with the foundation. I'm sure they are at the bottom here.
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Grateful for you scraperwill - I had no idea about that kind of thing.
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http://imgur.com/h3dtOAz |
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