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route 72 manahawkin bay bridges project graphic


September 2014

(click on thumbnail photos to enlarge in bottom window)

The column reinforcement steel is carefully lifted into place by a crane so that no damage occurs to the newly placed bars or to the bars extending out of the footing. The crew ties together the opposing surfaces of the galvanized reinforcement steel prior to pouring concrete for the pier columns. The steel rebar cage conforms to the shape of the pier columns and adds strength and ductility to the column.
Once the work for the reinforcement steel cage is complete, metal forms are placed to facilitate the concrete pour and to control the shape of the pier column. Custom column forms are used to match the geometry of the existing bridge piers. The design involved repetitive column dimensions and geometry to that the forms can be reused after an individual pier is complete.
After the concrete is poured, hardens and reaches an acceptable strength over time the forms can be removed revealing the concrete structure. Each form segment is removed carefully and independently.

This view is of a completed wall portion of the bridge pier column. Reinforcement steel extends out of the top of the column to provide the strength needed to connect the pier top/cap. Large recesses are built into the pier columns both vertically and horizontally to match the aesthetics of the existing bridge pier.
The formwork for the pier top/cap is placed after the wall portion of the column has gained the appropriate strength. Workers are completing the preparation tasks for the pier cap concrete pour from an elevated work platform integrated into the metal formwork.
The first pier top/cap has the formwork removed at the easterly end of the crossing. The pier is nearly complete with only minor finishing work remaining. There will be 16 piers constructed in the water for the new bridge, matching the number and location of piers of the existing structure.
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  Department of Transportation
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  Trenton, NJ 08625-0600
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  Last Updated:  September 23, 2014