Abstract:
The UW Hospital in Madison, WI is expanding with a new D2 Module Addition that add over 100,000 square feet of space. This expansion inlcudes the Emergency Department, Surgery and Diagnostic Imaging, and an additional 48 Inpatient beds. The earth retention system inlcudes excavations up to 47 ft deep with multiple levels of tiebacks. Two walls of the earth retention system will remain part of the permanent structure, which required additional coordination. This system supports adjacent structure footings, a skywalk, numerous pieces of construction equipment, and a tower crane. A micropile underpinning system and soil nail wall system was installed ender the existing E1 Module.
The project site is highly constrained with numerous utilities and adjacent foundations. 3-D modeling was used to plan all of the earth retention components to avoid conflicts and coordinate the construction with the project team. Westbrook Associated Engineers designed the system for Midwest Drilled Foundations and Engineering, Inc.