From clevelandmedicalmartonline.com:
PROJECT UPDATES :: JUNE 2, 2011
MALL C DEMOLITION IS ROUGHLY 95% COMPLETE WITH THE FOUNDATIONS FOR THE EAST STAIR TOWER CURRENTLY BEING REMOVED. INTERIOR DEMOLITION HAS PASSED THE HALFWAY MARK ON THE EXISTING EXHIBIT HALLS ''C'' AND ''D'' ON THE LOWER LEVEL OF MALL C. ON THE FORMER MALL B, CREWS HAVE COMPLETED MORE THAN 50 PRE-CORES FOR CAISSONS WITH CAISSON DRILLING BEGINNING EARLIER THIS WEEK.
MORE THAN 60 MICRO-PILES ARE COMPLETE. DEMOLITION CONTINUED ON MALL B NEXT TO PUBLIC AUDITORIUM. METAL SHEETING CONTINUED ALONG ST. CLAIR AVENUE, MOVING WESTWARD, WITH THIS ACTIVITY EXPECTED TO BE COMPLETED BY NEXT WEEK. WITH THE SHEETING WORK COMPLETE, CREWS WILL NOW BEGIN EXCAVATION DOWN TO FINISH EXHIBIT HALL FLOOR. CONTINUED DEMOLITION OF THE TOPPING SLAB AND 4' INTERSTITIAL SAND VOLUME, THIS WORK IS APPROXIMATELY 95% COMPLETE. THE TEMPORARY CONSTRUCTION RAMP BEING CONSTRUCTED WILL EXTEND FROM THE EXHIBIT HALL FLOOR TO LAKESIDE AVENUE.
ON THE MEDICAL MART SITE, MORE THAN 80% OF THE BACKFILLING HAS BEEN COMPLETED AND SOLIDER PILE INSTALLATION IS NEARLY COMPLETED. METAL SHEETING IN THIS AREA IS SCHEDULED TO BEGIN SHORTLY.
DEPENDING ON THE LOCATION ON THE SITE AND WHAT SUPPORT IS ULTIMATELY REQUIRED IN THAT LOCATION, THERE ARE A FEW DIFFERENT FOUNDATION SYSTEMS BEING EMPLOYED. MICROPILES ARE SMALL DIAMETER HOLES (LESS THAN 12"} THAT ARE DRILLED, GROUTED, AND FILLED WITH STEEL PIPE CASING OR A CENTRAL STEEL CORE FOR REINFORCING. SOMETIMES PILES ARE DRIVEN INTO THE GROUND TO CREATE FOUNDATIONS. THOSE ARE CALLED DISPLACEMENT PILES BECAUSE THEY DISPLACE EXISTING SOILS. BY CONTRAST, MICROPILES ARE REPLACEMENT (OR NONDISPLACEMENT) PILES, BECAUSE THEY ARE INSTALLED BY DRILLING AND REMOVING THE SOIL IN THE CORE AND REPLACING IT WITH STEEL AND A CONCRETE GROUT.
Read the rest of the update here.
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