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I-895 Toll Plaza and Interchange Improvement
Drilling, In-Situ Testing
2023
Scope
Our client was tasked with designing replacements/ reconstructions of the existing toll plaza, exit ramps, and bridges of I-895. We conducted SPT borings for this project but suggested supplementing the bridge abutment borings with CPTs to support a more cost effective design.
The Results
CPT testing and subsequent data reduction yielded modulus and shear strength values that were ~1.5-2x higher than those calculated from SPT N Values in nearby borings. Moreover, end bearing capacity and skin friction values for different pile designs were roughly 1.5-2x higher as well.
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