Museum of Science & Industry-U505 Sub Relo
City: Chicago
State: IL
Owner: Museum of Science and Industry
General Contractor: W. E. O'Neil Construction Company
Project Description:
The Museum of Science and Industry U-505 Submarine Relocation project required the construction of an underground reinforced concrete vault shoring (37 ft deep) and underpinning of the existing museum footings for construction of a new elevator and stairwell area.
Schnabel Foundation Company designed and installed the shoring and 21 micropiles approximately 65 ft long to support the existing structure. Micropiles consisted of a 9-5/8” diameter by 0.545-inch thick permanent casing extending into the stiff clay with a #20 bar extending the full length into the Chicago hardpan. To minimize interferences with future building walls, micropiles were drilled-in at a slight batter underneath the existing footing. Reinforced concrete micropile caps were placed under the existing footings to permanently support the building load.
