The building was originally designed for pile support. Menard’s alternative design of CMC rigid inclusions would support the entire facility and improve the soft, contaminated soils allowing for spread footings and slab-on-grade construction.
CMC rigid inclusions are a preferred alternative for ground improvement at brownfield sites because they are installed using a specially-designed auger that displaces the soil laterally, with virtually no spoil. In addition, the inherent flexibility in the design of this system allowed for field adjustment of the CMC rigid inclusions locations so as to avoid the long-term ground water treatment system (air sparging and soil vapor extraction) structures being incorporated in the site’s remediation plan.
Menard designed and installed thousands of CMC rigid inclusion elements to keep total and differential settlement within project tolerances of 1.2 in total and half inch differential. Four load tests were successfully performed to confirm critical components of the design. The installation was completed in 2.5 months using multiple rigs resulting in significant cost savings for the client.