Palmetto Section 5 SR-826/SR-836 Interchange. Miami, Florida


Awards

  • 2017 ACEC Grand Award
  • 2016 Roads&Bridges Top 10 Road Award
  • 2016 NSCEA Excellence in Structural Engineering Award
  • 2016 ACEC National Recognition Award
  • 2016 FICE Engineering Excellence Award – Grand Conceptor
  • 2015 ASBI Bridge Awards of Excellence

Services Provided by FINLEY

  • Pre-Bid Design and Technical Support for Proposal
  • Bridge Concept Report
  • Final Design and Contract Documents (including Load Rating)
  • Construction Engineering
  • Technical Support during Construction

Innovations

  • First Use of Diabolos
  • External Post-tensioning
  • Use of Pier Heads to Stabilize the Deck to Eliminate Temporary Supports
  • Use of Polystyrene in the Hollow Pier Columns
  • Expansion Joints at Abutments

Project Details

  • 360,718 square feet of deck area
  • 7,763 linear feet of bridge
  • Longest span of 266′ and tallest pier at 81 feet
  • Number of Segments: 775
  • Design-Build

Owner

Florida Department of Transportation - District 6 / Miami-Dade Expressway Authority

FDOT District 6 - Project Site Report Photos

Courtesy FDOT District 6

Client

Community Asphalt Corporation, Condotte America, Inc., The DeMoya Group, Inc., JV (Construction Engineering), and BCC Engineering

Renderings

Courtesy of Touchstone Architecture

Photos

Courtesy of AIM Engineering & Surveying, Inc., Condotte America, Inc., and Rizzani de Eccher

Video

http://www.local10.com/news/florida/miami-dade-county/dolphin-flyover-to-palmetto-nearly-complete_20151128095033390

Cost

$558 million

Start Date

November 2009

Est. completion date

April 2016

Specifications & Details


From Top to Bottom (294 KB)

Bd&e, Issue 65, December 2011


First Segment Erected for Palmetto Expressway Section 5 (32 KB)


Seeking Savings (1 MB)

Bd&e, Issue 61, November 2010


Project News: Palmetto Expressway, Section 5, Miami-Dade-County, FL (347 KB)

ASBI, SEGMENTS Newsletter, Winter 2011


FTBA Structures Session Presentation (3 MB)

Project update - February 19, 2013


2012 ASBI Convention Tour Palmetto Expressway Project (128 KB)


Less Leads To More (929 KB)

ASPIRE. Summer, 2014


FES Journal, October 2014 (6 MB)


Community Condotte DeMoya JV takes on massive $560M Dolphin/Palmetto Exp. Interchange (5 MB)

Dixie Contractor. June 2015. Part 1


Community Condotte DeMoya JV takes on massive $560M Dolphin/Palmetto Exp. Interchange (1 MB)

Dixie Contractor. July 2015. Part 2

This $558 million design-build-finance project involves the construction of an interchange between SR-826 and SR-836, two limited access facilities, as well as the reconstruction of SR-826 at Flagler Street and SR-836 at NW 72nd Avenue interchanges. Capacity improvements include the reconstruction and widening along both SR-826 and SR-836 and the construction of 46 bridges. The project will provide new direct connector ramps for major improvements and collector-distributor ramps to eliminate existing geometric and operational deficiencies.

As the Engineer of Record, FINLEY designed and provided the construction engineering on four high-level segmental bridge ramps (Bridge Nos. 9, 11, 15 and 19) that traverse the core of the interchange. The segmental bridge ramps were precast, balanced cantilever and erected with a 460 ft. launching gantry. The bridge lengths varied from 1,100 ft. to 2,450 ft. in length and are 47 ft.-wide with a maximum span length of 266 ft. The curved segmental bridge ramps are the third level of the interchange with radii down to 590 ft. and have a maximum superstructure deck height of 95 ft. above the proposed ground. All of the bridges are supported on 24” pile foundations and reinforced concrete piers and caps.

The design offered unique challenges integrating underlying roadways, canals, and MOT requirements into the layout of these segmental bridge ramps. This project was constructed in the Miami International Airport flight path and followed FAA requirements. The high level segmental flyovers are built over multiple roads that carry 430,000 vehicles per day and are the tightest elevation curves erected in the United States. The all overhead erection eliminated the need for falsework and cranes as well as eliminated five MOT phases that would have impacted traffic and provided a safer work environment. FINLEY integrated the design into the construction while satisfying the strong aesthetic requirements. The design reduced maintenance and construction costs with the utilization of external tendons, diabolos and deviators. Besides at the base of the caps the use of polystyrene in the hollow pier columns eliminated the need for interior formwork and reduced the overall mass of the structure and concrete required.

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