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J.F. White was contracted by Skanska for the Harvard Business School Chu Chao Center project as the pile foundation contractor. JFW’s scope of work was to furnishing and install 14 inch square, precast prestressed concrete (PCPS) piles.
In addition J.F. White probed each pile location to identify possible obstructions. The piles were designed for 125‐ton allowable compression capacity (320 ton ultimate capacity) and 54‐ton allowable design tension capacity (150‐ton ultimate). Out of the 188 piles, 180 piles were a 2‐part or spliced pile driven to end bearing in bedrock. The top and bottom pieces arrived on site separately. Once the bottom pile was installed, the top piece was installed and 4 pins were hammered in locking the top and bottom pieces together. The remaining 8 piles were single piece friction piles which were driven to a specific elevation.
J.F. White performed multiple Dynamic Tests (PDA’s) to confirm design and driving criteria on both end bearing and friction piles.
Contract value: $1,507,000. |