Jackson Bridge Removal
The bridge will be removed in segments from the bridge itself. Steel I-beams will be placed on the outside of the exterior stringers on the ends of the pile caps to serve as gantry crane rails. These beams will be 100' long, and will be placed to the side of the span being removed and the next two shoreward spans. Light weight gantry cranes running on these beams will be used to lift the span and transport it shoreward to a light wagon waiting on the adjacent span. The wagon will then be pulled to shore by a pickup or other light equipment, where the span will be removed. The steel beams and gantry cranes will then be utilized to remove the unloaded pier cap and piles, which will be placed on the wagon and taken to the storage yard. The steel beams and gantry cranes will then be lifted by the wagon and shifted one span shoreward, and the removal process repeated until the entire bridge is removed.
JACKSON BRIDGE REMOVAL SEQUENCE
1. Remove the existing asphalt surface.
2. Mark the weakest areas of the bridge.
3. Remove the rails, rail posts, fire stops, fire curtains, and splice blocks.
4. Remove an 8" to 18" strip of deck over the joints.
5. Remove the exterior stringer toe-nails and interior stringer drift pins.
6. Install steel I-beams to serve as gantry crane rails and install gantry cranes.
7. Lift, load, and remove the span.
8. Remove the unloaded pile cap and piling.
9. Shift the removal apparatus one span shoreward and repeat Steps 4 - 9. Repeat until the bridge is removed.