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Woodrow Wilson Bridge

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Demolition, drawbridge: Demolition view of bascule drawbridge on Potomac River, in open position, but with the draw bridge leaves (beams and road deck) cut off; leaving the geared rotating base (circled in gray). A bascule draw bridge has counterweights (circled in blue) on back side of draw bridge leaves so that raising the leaves and opening the bridge to allow ships to go through uses very little power/ energy. Woodrow Wilson Bridge Project at George Washington Street, Alexandria, Virginia, November 2006.
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Demolition, drawbridge: Demolition view of bascule drawbridge on Potomac River, in open position, but with the draw bridge leaves (beams and road deck) cut off; leaving the geared rotating base (circled in gray). A bascule draw bridge has counterweights (circled in blue) on back side of draw bridge leaves so that raising the leaves and opening the bridge to allow ships to go through uses very little power/ energy. Woodrow Wilson Bridge Project at George Washington Street, Alexandria, Virginia, November 2006.

DemolitiondrawbridgePotomac Riverconcretesteelbasculeleaveshighway bridgeconstructiondemolishedship passageWoodrow Wilson BridgeProjectGeorge Washington StreetAlexandriaVirginiaNovember 2006wilson drawbridge 2038

  • Airplane view of Woodrow Wilson Bridge construction project, looking from west to east, wiith the bridge carrying the Capital Beltway US495 and the Potomac River it spans in the center. The bridge shows three distinct segments. On the left are remains of the two lane westbound segment of the old bridge, not yet fully dismantled. In the center, dark in color, is the four lane westbound segment under construction. On the right are the four lanes of the new eastbound segment, currently carrying two lanes each way until the new westbound segment is completed. At photo bottom is the highway interchange between Route 1 and Capital Beltway I 95/495 with scheduled completion in 2008. The Beltway intersects I 295 at the far end of the bridge and Maryland 210 at photo top. All of these interchanges are part of the overall project. November, 2006.
  • Demolition, drawbridge: Demolition view of bascule drawbridge on Potomac River, in open position, but with the draw bridge leaves (beams and road deck) cut off; leaving the geared rotating base (circled in gray). A bascule draw bridge has counterweights (circled in blue) on back side of draw bridge leaves so that raising the leaves and opening the bridge to allow ships to go through uses very little power/ energy. Woodrow Wilson Bridge Project at George Washington Street, Alexandria, Virginia, November 2006.
  • Construction crane: Grove RT760E telescoping boom rough terrain 4-wheel drive 60 ton, 110 ft main boom mobile hydraulic crane, sitting on its outriggers, ready to lift materials into position. Woodrow Wilson Bridge Project at George Washington Street, Alexandria, Virginia, November 2006.
  • Demolition, drawbridge: Drawbridge on Potomac River: From background to foreground is (1) New 4 lane highway/bridge, with white painted steel drawbridge sections, (2) 4 lane highway/bridge under construction, with stub end sections of new drawbridge, and (3) partially demolished drawbridge section from old bridge. To either side of ship passage /drawbridge area are the concrete support structures for drawbridges. areas. These consist of large hollow bridge piers for old bridge and massive triangular structures for new bridge. Woodrow Wilson Bridge Project at George Washington Street, Alexandria, Virginia, November 2006.
  • Foundation pit for V-shaped piers for bridge, with protruding reinforced concrete piles/piers to be capped by pier. Structural steel interlocking sheet piles support soil around pit, with supplemental structural steel horizontal wales and cross pit bracing from steel pipes. In distance on left are completed east side of bridge and its piers and west side piers still under construction. In right background are field cast reinforced concrete modules from which bridge piers are being constructed. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Steel forms and green epoxy coated reinforcing steel for cast in place reinforced concrete bridge pier base in foundation pit. Ladders provide access for workers to complete preparations for concrete placement. Piers for completed east side bridge are in left background. The curved portion at bottom of completed piers coincides with curved forms in foreground, and the ~45 degree joint shown is connection of top of pier base to lowest field precast concrete modules of V-shaped pier legs. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Steel forms and green epoxy coated reinforcing steel for cast in place reinforced concrete bridge pier base in foundation pit. Ladders provide access for workers to complete preparations for concrete placement. Piers for completed east side bridge are in left background. The curved portion at bottom of completed piers coincides with curved forms in foreground, and the ~45 degree joint shown is connection of top of pier base to lowest field precast concrete modules of V-shaped pier legs. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Steel forms and green epoxy coated reinforcing steel for cast in place reinforced concrete bridge pier base in foundation pit. The corner openings provide access for placing concrete, to be closed when concrete reaches the opening. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Green epoxy coated reinforcing steel extends above top of formwork for cast in place base for V-shaped bridge pier. We look over top of structural steel sheet piles surrounding foundation pit for west most pier, looking at protruding steel and top of form of the next pier base toward completed pier of east half of bridge. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Precast concrete bridge construction: Precast post-tensioned concrete module, tied cantilevered arch section bridge piers, described as V-piers, support structural steel bridge stringers/girders/beams. Sloped arch sections consist of hollow field-precast reinforced concrete segments (as shown in foreground) tied together by post-tensioned steel cables. Wood forms on top of pier are for cast in place pier cap and tie into two post-tensioned horizontal precast reinforced concrete tension tie beams that will carry the outward thrust of the two pier segments. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capital Beltway, I-95/I-495. November 2006.
  • Precast concrete bridge construction: Precast post-tensioned concrete module, tied cantilevered arch section bridge piers, described as V-piers, support structural steel bridge stringers/girders/beams. Sloped arch sections consist of hollow field-precast reinforced concrete segments tied together by post-tensioned steel cables. Two piers in rear support completed south half of bridge, and two piers in foreground are being constructed for north half of bridge. Outward thrust of arch sections is supported by post-tensioned horizontal precast reinforced concrete tension tie beams. In foreground is Daewoo 340LCV track mounted backhoe/excavator. In midground is Link-Belt lattice boom track mounted crane. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Precast concrete bridge construction: Precast post-tensioned concrete module, tied cantilevered arch section bridge piers, described as V-piers, support structural steel bridge stringers/girders/beams. Sloped arch sections consist of hollow field-precast reinforced concrete segments tied together by post-tensioned steel cables. Two piers in rear support completed south half of bridge, and two piers in foreground are being constructed for north half of bridge. Outward thrust of pair of arch sections is supported by two post-tensioned horizontal precast reinforced concrete tension tie beams, which are cast in two segments, temporarily supported by a steel truss scaffold erection tower, to be joined by cast in place concrete and then posttensioned. In foreground is Daewoo 340LCV track mounted backhoe/excavator. In midground is Link-Belt lattice boom track mounted crane. Beyond that is JLG Ultra Boom self-propelled telescoping hydraulic boom personnel lift. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Precast concrete bridge construction: Precast post-tensioned concrete module, tied cantilevered arch section bridge piers, described as V-piers, support structural steel bridge stringers/girders/beams. Sloped arch sections consist of hollow field-precast reinforced concrete segments tied together by post-tensioned steel cables. Alternating precast concrete sections in the foreground pier have been darkened in this photo to identify them to the viewer. Two piers in rear support completed south half of bridge, and two piers in foreground are being constructed for north half of bridge. Outward thrust of pair of arch sections is supported by two post-tensioned horizontal precast reinforced concrete tension tie beams, which are cast in two segments, temporarily supported by a steel truss scaffold erection tower, to be joined by cast in place concrete and then posttensioned. In foreground is Daewoo 340LCV track mounted backhoe/excavator. In midground is Link-Belt lattice boom track mounted crane. Beyond that is JLG Ultra Boom self-propelled telescoping hydraulic boom personnel lift. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Precast concrete top center module/segment/section for bridge pier, with steel reinforcing bars and long steel bolts protruding to be imbedded in cast in place concrete connection between precast concrete tie-beam and top of the pier. This segment is shown in place in other photos. Portions of the sides of the module are corrugated to provide resistance to sliding/shear relative to the modules at its side. In the background are portions of two precast concrete modules from which the piers are constructed. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Construction of the cast in place concrete connection between one end of V-shaped bridge pier and one end of concrete tension beam, which ties two ends of bridge pier together to carry their outward thrust. The key element is the tightly grouped reinforcing steel in the center of the photo. Wood forms will be built around the reinforcing steel, and ready-mix concrete will be placed to fill the forms around the steel. After this concrete has gained its strength, post-tensioning cables run through the white tubes will be tensioned strongly to connect the tie beam to the bridge pier. In the interim, highly stressed tension cables, circled in blue, provide support against outward thrust of the piers until the tension beams are completed. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Construction of the cast in place concrete connection between the ends of two precast reinforced concrete beams. This connection will make them a single reinforced concrete beam, which will then be post-tensioned to become the tension tie beam that carries the outward thrust of the cantilevered arches of a V-shaped bridge pier. The beam ends and this construction point are supported from the ground by a steel truss scaffold erection tower, of which we see only the top part. Wood forms will be built around the bottom and sides of the space between the two beams, into which ready-mix concrete will be placed. After this concrete has gained its strength, post-tensioning cables run through tubes the length of the two beams will be tensioned to create the post-tensioned tie beam. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Construction of the cast in place concrete connection between one end of V-shaped bridge pier and one end of concrete tension beam, which ties two ends of bridge pier together to carry their outward thrust. The key element is the tightly grouped reinforcing steel in the center of the photo. Wood forms are being built around the reinforcing steel, and ready-mix concrete will be placed to fill the forms around the steel. After this concrete has gained its strength, the white-sleeve covered steel bolts will be tensioned to connect the tie beam to the bridge pier. A worker in the center of the photo gives an idea of scale of the construction. The top of the bridge pier consists of three sections of precast concrete connected together. These are easily differentiated in the lower right quadrant. These are tied together by post-tensioned long steel bolts whose ends are exposed here near the edge of the concrete section. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Cast in place concrete connection between top of pier and end of precast concrete tie-beam, which allows the tie-beam to act as tension member that ties the tops of the cantilever arched piers together. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Structural steel and precast concrete bridge construction: Precast post-tensioned concrete modular, tied cantilevered arch section bridge piers, described as V-piers, support structural steel bridge stringers/girders/beams. Sloped concrete arch sections consist of hollow field-precast reinforced concrete segments tied together by post-tensioned steel cables. Outward thrust of arch sections is supported by post-tensioned horizontal precast reinforced concrete tension tie beams. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
  • Concrete construction: Concrete is placed for bridge from lay-down concrete bucket supported by crane. Worker pulls down on pipe handle for concrete valve at bottom of bucket. Workers in mid/foreground are installing cover on freshly placed concrete to protect it from rapid cooling and drying. Woodrow Wilson Bridge; Project; George Washington Street, Alexandria, Virginia, November 2006
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