GES designed and oversaw the installation of 33 caisson foundation piles, each with a 100-ton compression capacity and a 20-ton tension capacity. Each pile had a minimum of 5 feet rocket socket length. Total length of the piles ranged from 46 to 65 feet. Steel reinforcement was installed, and each pile was tremie grouted from the bottom to top. GES provided constant on-site supervision of the installation of each pile. In addition, GES video inspected every pile in order to guarantee that each one met the design requirements. The piles were initially utilized as part of the support of excavation then as the foundation for an eight-story high residential building.

One of our clients was required to perform a geotechnical investigation in one of their buildings by The NYC Department of Buildings (NYCDOB) in order to issue a Certificate of Occupancy. The building was constructed in the late 1990s and had no foundation records. The purpose of this investigation was to identify the subsurface soil conditions below the building and its footings. While coordinating with the building manager and with the building still in use, GES utilized test pits and soil borings to conduct the investigation. GES determined the allowable bearing pressure of the building’s footings which was shared with the structural engineer and The NYC DOB granted these buildings a Certificate of Occupancy.

GES was involved in the subway project shown above and performed a subsurface investigation program to collect soil samples. Laboratory testing and analysis was also performed, including the in-situ testing of the soil. GES also mapped the top of rock in various areas of the tunnel.  Upon completion of the investigation GES prepared and submitted a report to the project team.

COMPREHENSIVE GEOTECHNICAL CONSULTING AND INSPECTION IN THE BRONX

As shown above GES was fully involved in the development of a one-to-eleven-story mixed use building occupying 11,250-square-feet. Multiple geotechnical investigations were conducted including test pits and soil borings, and rock coring for the proposed building. GES designed the retaining wall adjacent to an active Metro-North commuter rail line. GES also mapped the large variation of top of rock elevations to provide foundation recommendations and Support of Excavation drawings. GES was on-site full-time to inspect support of excavation installation, micropile drilling, rock bolting, retaining wall construction, subgrade preparation, structural fill placement and compaction.

STELCOR PILES IN MANHATTAN

GES provided full-time inspection services for the installation of Stelcor piles during the construction of a new multi-story building. Load testing of the piles was conducted in strict accordance with the latest New York City Building Code and the American Society for Testing and Materials (ASTM) requirements, ensuring compliance and structural integrity.