Quote:
Originally Posted by RWSMADCONC
Even rock has a "spring stiffness" like a posturpedic mattress. The mat or raft foundation is proportioned to distribute the column loads across large areas of the rock with limits of bearing pressure and settlement considered. The first pour was the lower mat for the core columns, the most recent was for the main footprint of the building. There is one more small mat pour up top, then a big pour down deep for the second core area within the parking portion. The tower is above both parts. The rest of the foundation in the south/deep part will look like any other building--square-ish pads, but there are large grade beams at the perimeter. Reinforcing and forms for those will start very soon .
Going deep is a calculated plan, as the high-bearing capacity rock is down there, so removal of lesser rock to get to the good stuff may as well be planned, and then putting parking there makes sense instead of above ground where it is ugly and inefficient for programming blocking and stacking of efficient, user-friendly care spaces.
The excavation is pretty close to being done.
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Thanks. Glad to have someone in the know passing on info.
So, at least at this site, the better rock is deeper, so there won't be the need for such a thick mat in the lower foundation because the rock there can handle the loads. On the upper section where the mat was just poured, would another option instead of the matt, have been drilled deep footers?
It sounds like parking might be confined to the eastern part, where there is still some digging taking place. And although I think HUP has a fetish about parking, I imagine they know their needs better then I do, and I'd rather have parking be in a hole instead of in a tower. My problem is more that HUP, Penn and Children's in general don't seem to realize that if for whatever reasons, good bad or indifferent, they keep bringing more and more cars into the area and are committed to providing parking, the actual parking is just part of the issue. General traffic gets to be more of a problem and it already backs up upon the expressway in certain hours. I live in the area and often need to drive and like any old fool I complain that its taking longer and longer to get to and from my home. The whole hospital area has grown and will continue to grow, and I wish the controlling powers would be just as interested in providing non-car options as they are in creating easy to park options.
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