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Geotechnology provided geotechnical subsurface exploration and subsurface utility locating services to Quality Level B, helping identify potential utilities in the area of proposed grounding rod installations. The project included the construction of approximately 22,150 feet of one to two railroad tracks north of Harbor Avenue on President’s Island Industrial Park.
Field exploration consisted of drilling 48 borings of depths ranging from 15-60 feet using all-terrain rotary drill rigs. Standard Penetration Tests (SPT’s) were performed using automatic hammers. Blow counts, or ‘N’-values, were recorded and are presented on the boring logs. Split-spoon and relatively undisturbed samples were obtained in general conformance with applicable ASTM standards at the depths indicated on the boring logs.
Geotechnology also performed multiple laboratory tests on select soil samples. Testing included: moisture content determinations, Atterberg limits, grain size analysis, unconfined compression strength testing, unconsolidated-undrained triaxial compression (UU) testing, consolidated-undrained triaxial compression (CU), direct shear, one-dimensional consolidation, and relative density.
StructureScan was performed using Ground Penetrating Radar (GPR) using Geonics EM31 and EM61 and 3D GPR data. The surveys were conducted to determine the reinforcing steel layout in a holding tank foundation and tilt up wall.
All of the tests performed were used by Geotechnology in providing engineering analysis and consulting services to the client. Detailed recommendations were provided as a result of Geotechnology’s interpretation of exploration data and past experience.