Lafayette College, Kirby House

The development of cracking and distress in a three story residence hall precluded an investigation that identified the presence of intermittent clay lenses in the steeply sloping bedrock.  Fluctuating ground water levels had triggered washout of lenses resulting in movement beneath the foundations.  Shallow surface and deep compaction grouting was conducted around the building and inside via low-headroom equipment, stabilizing the stratum beneath the building in order to arrest movement and prevent future subsidence.

Location: Easton, PA