The Tampa International Airport has been ranked as one of the best airports in the world due to its friendly parking and rental car facilities in close proximity to the terminal.
The parking garages represent one of the major sources of revenue, therefore closing operations, even temporarily for rehabilitation purposes was not an option. Access had to be maintained at all times.
Project Information:
Designed Build Contract
Contract Value: $6,414,400
NTP: Dec 12, 2012
Completion Date: May 31, 2014
Estimated Completion Date: Mid March 2014
Designer/EOR: Atkins Int.
Project Manager: Dario Munoz
Project Superintendent: Todd Lantzy
Assistant Project Manager: Alejandra Zamora
Subs:
Cross Engineering – Demolition
Liberty/Denson – Formwork / Rebar / Concrete
Florida Structural Steel : Working Platform and Steel Beams
Scope of Work:
The scope of work involved the removal of 14 spans in the entry and exit concrete ramps of the short term parking garage and replacement with a composite of steel beams and concrete deck.
Challenges:
1. Maintain vehicular access to the parking garage at all times during construction operation.
Two rolling steel working platforms 100 ft long weighing almost 100 tons, designed by Dixon Engineering and installed by Florida Structural Steel were anchored to the existing columns underneath the ramps to allow demolition and form work installation and removal.
The platforms had the ability to roll 50 lf in cantilever, care and precision had to be considered when distributing the live load and balance as they were moving to avoid any tipping of the platform or sliding of the construction debris. Two air tuggers (11000 lb/force)at each end were used to pull each platform.
Only 100 ft by 12 ft of ramp area was available for demolition and construction at the same time. However the entry and exit ramp were worked concurrently, facilitating tasks and trades continuity, maximizing productivity and reducing construction schedule.
Due to the height, weight and access restrictions, a mini excavator, mini hammer drill and bobcat were selected to execute the demolition work. The construction debris was removed on a daily basis by hand and hauled out in a pull behind trailer.
Crack Monitoring prior and after demolition of adjacent areas. Epoxy crack injection was performed to correct the affected areas.
2. Maintain access to pedestrian walkways between Short Term and Long Term parking garages
The short term and long term parking garages are connected by two elevated walkways. No closing of the two walkways was allowed at the same time. The short term parking garage ramps are in X configuration just above the elevated walkways, and by having the working platform attached underneath, caused them to encroach into the walkways as they move up and down. Intense coordination and planning was analyzed as to avoid conflicts that could potentially delay the construction.
3. Steel Beams Installation
The project had a total of 72 ea 45 ft steel I beams. The original design called for cranes that would lift up the steel beams 80 ft in to the air and then travel them around to the final location creating down time and safety issues. Further evaluation and creativity, the operation was simplified in cost and time by utilizing only two skid loaders to haul each 3 ton steel beam through the tool and ticketing booth, up the ramp and drop down the final location. The beam installation operation was minimized to 1 hour per span.
4. Form Work, Rebar and Concrete Installation
Organization and qualified manpower were the key components as having so many trades working in a reduce space was the challenge.
The concrete was pumped 80 ft up. Two tremie pipes were strategically located to minimize relocations.
