City Creek Center

GEI was the design engineer for the temporary shoring for the sides of a massive excavation that was the size of a city block using soil nails, underpinning, diaphragm walls, and jet grouting directly adjacent to several multi-story buildings and busy roadways.

Excavation was carried out 65 ft below street grade and by as much as 45 ft directly below adjacent buildings supported by shallow mat and strip-type footings. Movements of the earth retention system and adjacent buildings were monitored in real time using automated equipment, which complemented a suite of traditional geotechnical instrumentation. Controlling

movement of the earth retention system and adjacent buildings was a critical component of the project.

Our designs were modified during construction to address variations of subsurface conditions, foundation elements that differed from record documents, and integration of the permanent foundation system with elements of the temporary shoring. We were able to keep the schedule moving with real time solutions to difficult problems.