Full-Scale Field Verification of Vibro-Replacement Ground Improvement for Improving Static and Seismic Shallow Foundation Performance

Improving static and seismic foundation performance through vibro-replacement is a valuable alternative to traditional shallow and deep foundation options. However, appropriate design methods and field quality control (QC) measures are essential to implement a successful vibro-replacement program. Field QC, including comparison of pre-construction and post-construction soil exploration results (for seismic mitigation) and representative-scale performance testing of footings supported on stone columns provide valuable information about the effectiveness of the ground improvement program. This paper describes design, construction, and field verification testing of a vibro-replacement ground improvement program conducted to improve static and seismic performance of a shallow foundation system for a large structure in New Jersey. The field verification program, described herein, included a comparison of pre-construction and post-construction cone penetration testing and a full-scale footing performance test.