We’re hard at work on Staten Island, in New York City, where last weekend we finished the second of two massive concrete pours for the foundation of the New York Wheel, a 630-foot observation wheel that will rise over the southern end of New York Harbor and provide unique views of the Manhattan skyline. Our team has been working at the site — adjacent to the St. George Ferry Terminal — for 13 months, preparing the foundation for the 950-unit parking garage.
Our team executed two massive concrete placements – several weeks apart – for the observation wheel pile caps, beginning work at 3 AM on each day to coordinate each of the 13-hour, 400 truck operations. Each placement saw nearly 4,000 cubic yards of 10,000 psi, self-consolidating concrete that was placed continuously over 14 hours. The pile caps are founded on 96 drilled shafts installed by underpinning and foundation group. Each shaft is 67 inches in diameter and approximately 110 feet deep. Underpinning Foundation Group (UFS) offered an alternative reinforcement method for the shafts that saved time and space. Our engineering team designed a sheet pile support of excavation, utilizing a mud mat as bearing so that the excavation was free of walers and struts.
The operation was so well planned, teams wrapped up the first pour several hours ahead of schedule.
Our teams collaborated and created a thorough plan and schedule to ensure the project’s success. The Boston office provided the initial 3D modeling which was a valuable resource to our team in coordinating the installation of the reinforcing steel and embedment system. “This project allowed Skanska to demonstrate its ability to employ its diverse capabilities for a common goal” said Atul Murthy, field engineer.
Each of the pile caps is forty feet wide, eleven feet deep and approximately the length of a football field. Because of the heat generated by a concrete placement of this size, a cooling system had to be employed. Thousands of feet of cooling pipe was installed in the foundation, which were fed chilled water by a chiller plant assembled on site. Four local concrete plants supplied 85 dedicated trucks to the placements. Three concrete conveyors were used to execute the operation.
As part of the pour, New York Wheel President & CEO Rich Marin presided over a short ceremony that saw the burying of a time capsule in the Skanska-poured foundation, set to be opened in 630 years (signifying a year for every foot of elevation of the Wheel). Check out the video of the ceremony to find out the contents of the time capsule and see it being buried in the foundation:
The Wheel is predicted to be the tallest of its kind in the world, surpassing the Las Vegas “High Roller” – which is 550 feet tall – and is predicted to attract 3.5 million visitors a year, according to its creators. The structure will begin to rise later this summer.
For more on The New York Wheel click here.