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My Construction Photos > 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.
My Construction Photos > Peterbilt tractor pulling flatbed trailer waits at construction site after delivering materials. In immediate background are galvanized steel soldier beams embedded in concrete in earth to support brick acoustic/privacy fence. US Route 1 interchange with I495 Capital Beltway. Woodrow Wilson Bridge project, Alexandria, Virginia. November, 2006.
My Construction Photos > 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.
My Construction Photos > 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.
My Construction Photos > 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.
My Construction Photos > 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.
My Construction Photos > 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.
My Construction Photos > 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.
My Construction Photos > 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.
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.
My Construction Photos > 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 (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.
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