San Francisco International Airport
San Francisco, CA
The addition of a new international terminal required an expansion of the existing multiple-level parking garage. An unexpected concrete slab failure occurred during construction. The original top level of the garage had a bituminous traffic layer that had to be removed to accommodate the expansion. The bituminous layer was removed with high-pressure water jets, which penetrated the concrete slab in some locations. SGH conducted a detailed site investigation, including removing concrete cores and reviewing construction records. Through petrography, SGH established that the concrete slabs were built with lightweight concrete and were of uneven strength, and could not withstand the strength of the water jets.
Service Provided:
Investigation
Supporting Capabilities:
Structural Engineering
