SEISMIC SUPPORT SYSTEM FOR EXPANDED POLYSTYRENE GEOFOAM BRIDGE

According to the U.S. Department of Transportation, 61,000 bridges in the United States are structurally deficient. Consolidation and post- construction creep settlement slow and inhibit accelerated construction of support systems for bridge structures on soft soil. Other common challenges include low bearing capacity, poor construction conditions, relocation of buried utilities, and potential settlement damage to adjacent structures and foundations.

Expanded Polystyrene (EPS) Geofoam Bridge Support Systems accelerate construction of bridge support without compromising safety. EPS eliminates the need for deep foundations or ground improvement in soft ground conditions. EPS technology is lightweight and reduces, or almost eliminates, uneven settling of soil. EPS bridges are used around the world, but not currently permitted in the United States as they do not hold up under seismic conditions. The proposed system increases stability during seismic events by utilizing a steel cable system enabling EPS bridge deployment in seismic geographic areas.