Keller drilled shafts performance-based design

Ground improvement at the city of Hamilton bus maintenance and storage facility Featured

After discovering differing ground conditions, Keller provided an alternative design for the new bus maintenance and storage facility at the City of Manilton.

The City of Hamilton constructed a new bus maintenance and storage facility to increase the transit division's capacity for its growing fleet. The facility will include a garage, maintenance bays, a parking garage, and a two-story office area. Ground conditions across the 41-acre site comprised poor-bearing soils, including a continuous peat layer with high compressibility.

Initial geotechnical reports recommended using rigid inclusions for ground improvement; however, through further investigation, Keller found discrepancies in the thickness and compressibility of the peat layer.

Keller proposed an alternative design that:

Retained the 4800 rigid inclusions across the site
Required the addition of 260 CFA (auger cast) piles and drilled shafts to support the parking garage and office building.

Keller fast-tracked the installation to meet the client’s schedule and allow for the next phase of construction.

Learn more about the project