I-75 Wildwood Interchange
This project consisted of widening and reconfiguring the I-75/Florida’s Turnpike Interchange. Improvements included the construction of braided ramps to and from SR 44 to eliminate weaving, widening of I-75 and the construction of auxiliary lanes on NB I-75 north of SR 44.
The project began just south of the I-75/Florida’s Turnpike Interchange (MP 20.814) and terminated north of the SR 44 NB entrance ramp (MP 24.052). Through the ATC process, profile grades were lowered for most highway and ramp alignments, which resulted in reducing the settlement. To lower the profile of 2 bridges, large steel straddle bents were changed to inverted “T” concrete post tensioned straddle bents.
2020 – Best in Construction – Interchange
By the Numbers
2 spans, 322 FT long
Ramp A-2 Flyover
2 spans, 345 FT long
Ramp B Flyover
2 spans, 297 FT long
Leg B Bridge
178K SF
MSE Walls
198K CY
Muck Excavation
60K SF
Rigid Inclusions
$75M
Project Value
Scope of Work
- Widened NB and SB I-75 to accommodate an additional travel lane
- Provided a right exit ramp to SB Turnpike from SR 44
- Separated NB I-75 exit traffic to SR 44 from NB
- Mainline traffic
- Constructed a new bridge over NB I-75 fpr SB Turnpike traffic
- Milled and resurfaced new and existing pavement
- Post-tensioned concrete inverted “T” straddle bents
Unique Challenges
- Thick layers of compressible soils, in many locations too thick to excavate completely or too deep for an excavator to reach.
- Settlement was limited to 0.5” within 200 FT of the bridge approaches; rigid inclusions were installed to keep within limits.
- Staged constructed was used for embankment and MSE walls outside of 200 FT.
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