J. F. White was contracted by SKANSKA Building Co. for the 5 story underground, 650 car capacity parking garage for the Harvard Law School Library project. The facility was constructed using a perimeter reinforced concrete diaphragm wall, 48 load bearing elements and a composite structural steel/concrete street level slab. Parking level slabs below the street level slab were cast in place- post tensioned concrete.
Excavation for the parking levels proceeded in a “Top Down” sequence with J. F. White mining and tunneling beneath the newly constructed slabs after they had been cured and tensioned. Material was removed from the excavation via 3 glory holes, utilizing a crane equipped with a 4 C.Y. clamshell bucket.
The Project presented logistical challenges to maintain an aggressive excavation schedule on a tight job site with limited access in a densely populated section of Cambridge. Through pre planning, coordination and close cooperation with Skanska the project was completed safely and within the targeted milestone.
Contract value: $14,700,000. |