To meet the settlement criteria for this project (1″ total and ½” differential), Menard’s design engineers evaluated the performance of 12.5-in and 15.7-in diameter CMCs installed through the mine spoil and alluvium, where present. The CMCs were designed to terminate in either dense residual soils or on shale bedrock.
The design, which incorporated 496 CMCs, provided support under spread footings that supported the structures. The average depth of the CMCs was 48.4 ft. and Menard completed the installation of the CMCs within five weeks.
All work was completed in one continuous phase with all quality control testing meeting specified requirements.