The Woodrow Wilson Memorial Bridge is the only
Potomac River crossing in the southern half of the Washington
Metropolitan area. It carries the Capital Beltway (I-495),
which is part of I-95, the main north-south interstate route
on the East Coast.
Approximately 6,000 feet long, the new bridge will be designed
for HS25 loads consisting of six lanes for local traffic,
four lanes for express traffic, and two HOV lanes. Provisions
are made for future replacement of the HOV lanes with light
or commuter rail.
An arch-like appearance is achieved by introducing v-shaped
piers with curved legs, which support haunched girders.
This structural system consists of independent structural
units (v-piers), and produces zero horizontal thrust forces
under dead and live loads.
Proper arrangement of the girder spans balances the dead loads
and produces minimal bending moments at the piers. This system
results in significant savings in the foundations, especially
at the bascule piers.
The v-pier system allows longer spans than the traditional
arch system providing greater openness underneath the bridge.
The v-pier legs consist of precast, match-cast hollow concrete
box sections that will be post-tensioned in place.
Services
Provided by FINLEY
• Design and Details of the Precast, Post-Tensioned
V-shaped Piers for the Fixed Spans
• Erection Procedures for the V-Shaped Piers Utilizing
Horizontal Stays
• QA/QC Review of V-shaped Piers for Moveable Spans