Wrigley Field Plaza Building Chicago, Illinois During the winter of 2014 and spring of 2015, Case installed 63 belled caissons with smooth wall corrugated liner. Shafts ranged from 3ft diameter to 4.5ft diameter and bells ranged from 7.5ft diameter to 13.0ft diameter. Drill depth was approximately 63ft below working grade. Case also installed 11 dewatering pumps. The secant wall installation included 258 secant piles around the Nor

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