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Industrial

Specfuel Waste to Energy Plant Addition

Philadelphia, PA

DESCRIPTION

A building addition was needed for Waste Management’s waste to energy facility.   The facility turns trash into SPEC fuel pellets.

CHALLENGE

The soil conditions at the site consisted of dense sandy urban fill soils underlain by soft alluvial soils and weathered rock. The site, which is located next to the Delaware River, also had high groundwater conditions.  The project was originally designed for timber pile support of the footings and structural floor slab due to the soft alluvial soils and tight settlement tolerance of the building addition.

SOLUTION

GeoStructures provided a value engineering alternative to the deep foundation system using Grouted Displacement Impact® elements.  A total of 685 twenty-inch diameter Grouted Displacement Impact elements were installed to support column and wall foundations, floor slab, and equipment pads for the building addition. The Grouted Impact Pier elements were installed to depths of 17 to 40 ft to fully penetrate the soft alluvial material and tag the weathered rock. In order to limit construction vibrations acting on the existing structure, which remained in use throughout construction, the column line closest to the building was supported using helical piles.  The helical piles were approximately 40 to 45 ft in length.  The combination of Grouted Displacement Impact elements and helical piles provided the required total and differential settlement control while minimizing vibrations and disruptions to on-going facility operations.

Owner

Waste Management of Pennsylvania - Bristol, PA

Construction Manager

Gilbane Building Company - Philadelphia, PA

General Contractor

MECO Constructors, Inc - Bensalem, PA

Architect

Stantec Consulting Services, Inc - West Chester, PA

Structural Engineer

Stantec Consulting Services, Inc - West Chester, PA

Geotechnical Engineer

NTH Consultants, Ltd - Valley View, OH

Product

Geopier Impact® System

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