CMCs implemented for the ground improvement works
The Owner, General Contractor and Engineer – all of whom were unfamiliar with CMCs – were not convinced that CMCs would provide optimal ground improvement to support the new building. Aggregate piers were recommended by the geotechnical engineer. Multiple meetings were held until all parties agreed on the installation of CMCs.
Menard’s value-engineered (VE) solution proved to be more economical and time-saving than driven piles in supporting the building’s footings due to the required high bearing capacity. A total of 870 CMCs were installed to an average depth of 15 ft and a maximum depth of 22 ft. Menard designed a layout of CMCs at each footing to support the building’s column loads. The design provided for 1 in of post-construction settlement with a differential settlement of less than a 1/2 in, meeting the performance criteria of the building.
This project was among the first in which Menard used a new rig mast for installing smaller diameter – 11 ins – CMCs.
For a project that included the construction of a three-story building, Menard successfully installed CMCs, meeting the client’s requirements for quality and safety.