Memorial Bridge, Portsmouth, NH - Kittery, ME

The Memorial Bridge for US Rt. 1 over the Pistataqua river included 11 drilled shafts for Kittery approach, 8 drilled shafts for the Scott Ave. approach, and 74 micropiles drilled through the existing piers to support the new structure. The project was completed between April and December of 2012.

The Broad Institute, Cambridge, MA

The Broad Institude required the installation of 27 drilled shafts and 13 micropiles in a ot adjacent to an existing parking structure, with an additional 55 micropiles drilled with limited access and low headroom in the basement of the existing parking structure to support supercolumns. A 650-ton pile load test was performed on a 9-5/8" micropile to verify the inoovative pile design utilized in the project. Combined, the foundation elements support a new 18 story structure both adjacent to and above the parking structure. Hub completed the project in July 2012 and it was featured in the Spt/Oct 2013 issue of DFI's "Deep Foundations" magazine.

Chelsea Street

Contracted by JF White to install 27 five foot diameter drilled shafts, ranging from 120 to 165 feet long, Hub Foundation has successfully completed the first phase of 23 shafts. The site is split into quadrants, two on either side of Chelsea Street in East Boston and two on each side of the street in Chelsea. Site access, site footprint, and pedestrian and traffic proximity were only part of the problem on this challenging project. Much of the drilling strata were loosely confined silts that ultimately required a 95 foot long casing to extend all the way down to rock.  To handle this 18 ton behemoth we needed another behemoth, our 20 ton APE King Kong vibratory hammer to shake it into place and retract it.  However that meant we needed our 250 ton Liebherr 895 to handle the casing and the vibro.  Add our Soilmec 930 drill rigs and space was at a premium.

MWRA Sewer, East Boston, Caliacco

Hub Foundation drilled in place ten 32 foot long H-piles for a soldier beam and lagging wall pit for P. Caliacco Corp.  and Jacobs Engineering. We mobilized, drilled the holes, set and poured the beams and demobilized in four days. We paid particular attention to beam location and orientation because they are critical for efficient lagging, wale, and strut installation.  Drilling went below the water table through urban fill and marine deposits, but our techniques prevented water from infiltrating our excavation. This kept the site cleaner and free of tanks and pumping apparatus. Our ability to work well with general contractors, minimize our onsite footprint, maximize efficiency with our equipment and expertise, and our emphasis on safe construction practices allow Hub to perform well in the tightly configured urban construction sites that dominate utility work.

MWRA Sewer 1   MWRA Sewer 2