Title:

Geotechnical Investigation into a College Dorm on Troubled Ground

This report presents a preliminary geotechnical assessment and design evaluation for a proposed five-story residential dormitory with a basement garage, developed in collaboration with GZA GeoEnvironmental, Inc. The site is characterized by complex topography, existing infrastructure, variable fill materials, and a shallow groundwater table, all of which pose significant challenges to construction and long-term performance. Subsurface investigations, including thirteen boreholes and laboratory testing, identified predominantly loose sands and silts extending to significant depths, with low bearing capacity and high settlement potential. To address these challenges, the study evaluates a range of ground improvement and foundation solutions, including soil compaction, engineered fill, deep foundations, and aggregate pier systems. Design considerations such as slope stability, bearing capacity, lateral earth pressures, and frost depth are incorporated to ensure structural safety and serviceability. Vibro and rammed aggregate piers are identified as effective and cost-efficient solutions for improving soil performance while enabling the use of shallow foundations. Overall, the report integrates geotechnical data, engineering analysis, and construction considerations to develop practical recommendations for safe and efficient site development. Remaining work focuses on refining bearing capacity calculations and finalizing foundation design to deliver a cohesive and implementable solution.

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