19026-VA Medical Center Geotech Rpt 1.pdf

This document is a Geotechnical Engineering Report prepared by Paul B. Aldinger & Associates, Inc. for the proposed VA Medical Center MRI Imaging Center Addition located in Providence, Rhode Island. The report details subsurface exploration and analysis conducted in November 2020, including test borings at multiple locations on the project site. Key findings include that the site's subsurface geology consists of non-engineered granular fill overlying glacial outwash, with soil conditions characterized as fine to coarse sand with varying amounts of gravel and silt. Laboratory sieve analyses of soil samples revealed the site soils contain approximately 41-45% sand, 10-13% silt and clay, and 12-30% gravel.

The report provides detailed geotechnical recommendations for foundation design, including spreading footing or mat foundation support on compacted structural fill placed over the natural glacial outwash layer. Specific recommendations include removing non-engineered fill to a depth of approximately 8 feet, using a minimum of 12 inches of compacted structural fill beneath footings and slabs, and monitoring soil compaction during construction. The engineers also noted the site is not susceptible to earthquake liquefaction and recommended a Site Class D classification. The investigation was performed to support the VA's planned three-story MRI Imaging Center Addition with approximately 17,100 square feet of new construction and 1,400 square feet of renovation.