In July 2006, initial construction of the new Mets Stadium was underway in the parking lot beyond the old stadiums left-field. The design called for the playing field to be elevated five to six feet above the grade of the old parking lot. However, the additional fill required to accommodate the design would add an estimated 700 pounds per square foot which was problematic because the extra weight would cause substantial settlement of the weak native soils in the area and require a lengthy surcharge of soils until the settlement subsided.
Most proposed solutions to this situation were cost and time prohibitive. The initial plan called for reducing the load on the underlying soils by using Lightweight Aggregate as fill. This would have yielded a density of ~55pcf after compaction. However, when the owners learned that MixOnSite's Geofill LD Low Density Cellular Concrete was being used on a cross-town rival's new stadium, they decided to investigate further.
After further review, the decision was made to use Geofill LD Pervious averaging 29 PCF and 80 PSI. This decision resulted in a direct savings of more than $500,000.00 along with an immeasurable savings of time. The only condition was that the Geofill LD Pervious be as free draining as lightweight aggregate since the infield lacked the drainage system that would have been needed to accommodate a non-pervious material. This challenge was easily met using MixOnSite's Geofill LD Pervious material.
More than 1,000 cubic yards of Geofill LD Pervious was produced per shift using MixOnSite's high capacity dry mix equipment which allowed us to complete our scope of work well ahead of schedule. For more information on Geofill LD Pervious click here
Lurie Medical Center Chicago, IL
Load Reducing Backfill
This project required backfilling narrow areas up to 45’ deep between the new foundation and the sheet piles. Granular backfill would have required compaction which was logistically impossible, while flowable fill or CDF would exert too much load on the foundation wall.
Geofill Hybrid (70 PCF) reduced the lateral load against the foundation and eliminated hydrostatic pressure by being impermeable. The flowability of the material resulted in minimal disruption to the site.
