AGI installed wick drains and stone columns at the
Mission Rock project in San Francisco, CA. The ground
improvement served to mitigate the potential for
liquefaction during an earthquake and control static
settlement. AGI installed approximately 380,000 ft of
wick drains and 5,000 stone columns. The wick drains
allowed for rapid dissipation of excess pore pressures
generated by the stone columns installation, thereby
improving this technique’s effectiveness. AGI recorded
the penetration resistance vs depth that allowed the
GEOR to determine the depth of the Bay Mud layer at
each wick drain location across the site. Once that
contact was determined the stone columns were
installed terminating 2 feet above that layer.
Design-Build Contractor:
Advanced Geosolutions Inc (AGI)
Developer (Tenant):
Tishman Speyer
General Contractor:
Webcor Geotechnical
Engineer:
LANGAN Engineering