My Construction Photos > 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.
My Construction Photos > 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.
My Construction Photos > 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.
My Construction Photos > 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.
My Construction Photos > 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.
My Construction Photos > Precast concrete tilt-up construction: Specialized lifting hardware for tilt-up wall construction by which crane can lift reinforced concrete walls from horizontal casting position to vertical position in wall. Primary hardware is steel lifting stud/anchor/bolt/plug, attached to reinforcing steel or wire embedded in concrete, as shown in circled inset, as it looks after lift is completed and hardware has been released. This is lifted by ground release lifting hardware consisting of a clasp/lock/grip that fits over the lifting stud/anchor and grips it while the attached lifting eye/bale applies lift. The lifting clasp/lock/grip has a release arm by which an attached rope/chain/cable is pulled down by worker on ground to release the lifting hardware from the wall after lift has been completed. A lifting clevis (red here) provides attachment to crane cable by which wall is lifted. Photo shows lifting hardware in place on right, before ground man has activated its release arm by pulling on attached release chain. To left is lifting hardware after its release from lifting stud/anchor. Phoenix, Arizona, November 2006.
My Construction Photos > Precast concrete tilt-up construction: Reinforced concrete wall section was pulled up at its top by crane into near vertical position to form section of outside wall of building. Worker uses impact drill to make hole in slab into which to bolt bracket that supports diagonal shore/brace to hold wall up until roof structure is in place. Phoenix, Arizona, November 2006.
My Construction Photos > Precast concrete tilt-up construction: Reinforced concrete wall section has been pulled up at its top into near vertical position to form section of outside wall of building. Wall section is heavily reinforced concrete that was cast in horizontal position on top of floor slab of building, which alleviated the need for wall forms. It is lifted by steel cable, hooked to wall at a 8 points to provide force sufficient to break wall free from the slab beneath it and lift it into its final vertical position. Two point support from lifting beams/ harness and pulleys provide independent support to each lifting point. Pipe with screw jacks at end align the wall and support it against wind forces. Workers 3, 5, and 6, from left to right, hold chain/cable with which they will jerk out pens locking the lifting cables to the slab wall, and they will next pull to withdraw pens to separate lifting tools from the wall. Phoenix, Arizona, November 2006.
My Construction Photos > Precast concrete tilt-up construction: Reinforced concrete wall section is pulled up at its top into near vertical position to form section of outside wall of building. As foreman on right signals crane operator to hold position of tilted up concrete slab wall section, workers inside and outside manually position bottom of section to sit on its foundation, forming corner with previously placed adjacent section. Worker on left holds up adjustable shore so it does not drag on ground/slab and impact positioning. Phoenix, Arizona, 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.
My Construction Photos > 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.
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