7 march 2014 2014 virginia concrete paving conference richmond va
This presentation is the property of its rightful owner.
Sponsored Links
1 / 23

7 March 2014 2014 Virginia Concrete Paving Conference, Richmond, VA PowerPoint PPT Presentation


  • 107 Views
  • Uploaded on
  • Presentation posted in: General

DFW Connector Pavement Design and Construction Challenges and Solutions. 7 March 2014 2014 Virginia Concrete Paving Conference, Richmond, VA. By: Dan Dawood, P.E. DFW Connector. Owner: TxDOT D-B Firm: NorthGate Constructors Lead Design: PB Americas Pavement Design: Transtec

Download Presentation

7 March 2014 2014 Virginia Concrete Paving Conference, Richmond, VA

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


7 march 2014 2014 virginia concrete paving conference richmond va

DFW ConnectorPavement Design and ConstructionChallenges and Solutions

7 March 20142014 Virginia Concrete Paving Conference, Richmond, VA

By: Dan Dawood, P.E.


Dfw connector

DFW Connector

  • Owner: TxDOT

  • D-B Firm: NorthGate Constructors

  • Lead Design: PB Americas

  • Pavement Design: Transtec

  • Cost: Over $1.0 billion

  • Publicly funded CDA:

    • $667 million from public gas taxes,

    • $250 million from ARRA funds, and

    • $107 million from bond proceeds for ROW acquisition.

www.dfwconnector.com


Dfw connector1

DFW Connector

  • Project Length: 8.4-mile initial phase of 14.4-mile project,

  • Existing 12 Lanes Expanding to 24 lanes

CL

2-3 lanes

6-7 lanes

2 lanes


Dfw connector design tasks

DFW Connector Design Tasks


Pavement design tasks

Pavement Design Tasks

  • Thickness design

  • Reinforcement design

  • Temporary pavement design

  • Block-out solutions

  • Terminal joint design

  • Pavement transitions

  • Pavement widenings

  • Gore area design

  • Mix and materials

  • Resilient modulus verification


Crcp thickness design

CRCP Thickness Design

  • PCC Thickness Design

    • 10” CRCP for Frontage Roads

    • 13” CRCP for Main lanes, Ramps, and Managed lanes

    • 2.5” HMA Base Layer

    • 12-36” Lime Stabilized Subgrade/Crushed Concrete Base (Effective Plasticity Index Requirements)


Reinforcement design

Reinforcement Design

  • Adopted updated reinforcement standard

    • CRCP (1) -03

      • Longitudinal Steel

        • 13” CRCP: #6 bar @ 5.5”

        • 10” CRCP: #6 bar @ 7”

      • Transverse steel

        • Varies as a function of pavement width (PW)

        • For 13”: #6 @ 2.5’ for PW < 60 ft up to @1.0’ for PW < 120 ft,

          CRCP (1) -09

      • Same Longitudinal Steel as CRCP (1) -03

      • Transverse steel: #5 @ 48” for PW up to 100 ft


Optimized pccp mix

Optimized PCCP Mix

  • #57 stone, pea gravel, and natural sand


Toll gantry area blockouts

Toll Gantry Area Blockouts


Other pavement design tasks

Other Pavement Design Tasks

  • CRCP Transition Design

    • CRCP to HMA

    • CRCP to existing CRCP

    • CRCP to new CRCP

    • CRCP Thickness Transition

  • Design of Pavement Widenings

    • Drainage Considerations

    • Remaining Life of Existing CRCP

    • Future Rehabilitation Needs

  • ProVAL Analysis - PI vs. IRI


Accelerated construction challenges and solutions

Accelerated Construction Challenges and Solutions

  • Construction Schedule: 4 years (2010-2014)

  • Design-Build contracting process


Accelerated construction challenges and solutions1

Accelerated Construction Challenges and Solutions

  • Keep all lanes open during peak travel times

  • Temporary pavement to shift traffic


Accelerated construction challenges and solutions2

Accelerated Construction Challenges and Solutions

  • Keep all lanes open during peak travel times

  • Most lane closures scheduled to occur at night (off-peak)


Accelerated construction challenges and solutions3

Accelerated Construction Challenges and Solutions

  • Varying paving widths:

    • 12’ lanes, 10’-12’ shoulders, 16’-24’ ramps

    • 10’, 12’, 16’, 22’ and 24’ paving widths

  • 10”-13” paving thicknesses

  • Short poursdue to MOT and bridge construction

EB & WB managed lanes – SH 114


Accelerated construction challenges and solutions4

Accelerated Construction Challenges and Solutions

  • Four new Guntert & Zimmerman pavers

    • S600 – 10’-18’ paving widths

    • S850 – 18’-24’ paving widths


Accelerated construction challenges and solutions5

Accelerated Construction Challenges and Solutions

  • Four new Guntert & Zimmerman pavers

    • Stringless compatible

    • Mobility – Tracks steer 90°

    • Telescoping End Sections

      • Easy to change widths – 2 hrs

    • 226 lane miles of CRCP (535,000 yd3)


Terex batch plant model s

Terex Batch Plant Model S

  • RexCon Dual Drum 12 yd3 plant

  • Capacity 600 yph.

  • Typical batch size is

    • 11 yd3 on flowboy rear discharge trailers

    • 7 yd3 on tandem dump trucks


Location of batch plant and yards

Location of Batch Plant and Yards


Completed manage lanes

Completed Manage Lanes


Leica stringless system

Leica Stringless System


Leica stringless system1

Leica Stringless System

North bound widening on SH121


Leica stringless system2

Leica Stringless System

Advantages:

  • Smoother ride

  • Eliminates man-hours in the field  (production and safety).

  • Eliminates schedule impacts/coordination (stringline setup/removal). 

  • Flexibility

    • Haul route

    • Trucks entrances and exits

    • jump around from area to area (easier set-up)


7 march 2014 2014 virginia concrete paving conference richmond va

www.thetranstecgroup.com


  • Login