The project involved the rehabilitation of the New York Avenue Bridge and approach roadways between Florida Avenue and 9th Street NE. The bridge passes over numerous rail lines such as CSX, Amtrak, Washington Metropolitan Area Transit Authority (WMATA), Maryland Area Regional Commuter (MARC), and the Virginia Railway Express (VRE). Rehabilitation work involved the demolition, removal, and reconstruction of the bridge superstructure between the existing abutments utilizing the accelerated bridge construction (ABC) approach.
Subsurface conditions were investigated by drilling three auger test borings, one dilatometer (DMT) test boring, and two cone penetrometer (CPT) test borings in the vicinity of the bridge foundations. In addition, GeoConcepts performed Windsor Probes and obtained deep concrete piers from the existing bridge structure to evaluate the concrete compressive strength.
Based on GeoConcepts’ recommendations, the design team was able to determine if the subsoils could support new loading and what components of the bridge could be rehabilitated to support a new bridge including an additional travel lane. The team was able move forward with accelerated construction methods, determining the most economically viable options for minimal traffic disruption (vehicular and train) and construction time.