Project Description:
AGI designed and constructed a Deep Soil Mixing (DSM) ground improvement system for an 11-story affordable housing development in Downtown San Francisco, CA. Despite a constrained urban site at only 26,900 sf, AGI planned logistics and executed the work plan required to install 17,000 cubic yards of treated soil across the site. Soils were treated to a max depth of 41-feet using a rotary mixing tool to form a closed-cell (cellular) soil mixing system beneath the site improvements to mitigate liquefaction, increase allowable bearing capacity, and limit post-construction static and seismic settlements. AGI collaborated closely with the Owner, SEOR, GEOR, and GC to ensure the ground improvement design was in conformance with the project specifications. AGI’s QA/QC process included performing coring for continuity verification as well as unconfined compressive strength (UCS) testing on cored and wet-grab samples during production. All results met the project specifications.
