Elliott County KY 7 3D Modeling Pilot Project Kevin Martin, PE - - PowerPoint PPT Presentation

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elliott county ky 7 3d modeling pilot project
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Elliott County KY 7 3D Modeling Pilot Project Kevin Martin, PE - - PowerPoint PPT Presentation

Oct 24, 2022 175 likes •358 views

Elliott County KY 7 3D Modeling Pilot Project Kevin Martin, PE Jason Littleton, PE Project Overview Designed by KYTC Obtained input from Division of Construction and KY Association of Highway Contractors Requires contractor

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SLIDE 1

Elliott County – KY 7 3D Modeling Pilot Project

Kevin Martin, PE Jason Littleton, PE

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SLIDE 2

Project Overview

  • Designed by KYTC
  • Obtained input from Division of

Construction and KY Association

  • f Highway Contractors
  • Requires contractor to use

design model

  • Model rules over plans
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SLIDE 3

Project Details

  • 5 miles of KY 7

in Elliott Co from KY 885 to Grayson Lake

  • Rural, 2-lane

relocation

  • ~ 3M CY

excavation

Project Termini

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SLIDE 4

Project Goals

  • Determine “Best Modeling

Practice”

  • Determine best submittal to

contractor

  • Determine role of designer after

letting

  • Create dialog between

Design/ Construction/ Contractor

  • Set new policy for better models
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SLIDE 5

KY 7 Model

  • Modeled entirely

in Roadway Designer

  • Mainline,

Approaches, Entrances, Ditches, Radii

  • Finished grade,

Subgrade, etc.

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SLIDE 6

Why Model in 3D?

Design Benefits

  • Catch design errors

prior to construction

  • Better

communication of intent

  • Utility/ sewer clash

detection Construction Benefits

  • Decreased bids
  • Decreased change
  • rders
  • Better construction

inspection

Better overall product!!!

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SLIDE 7

Special Notes

Special Notes were included to

  • verride KY Standard Specs
  • Use of 3D Design Model
  • Corrections to 3D Surface Model
  • Mandatory Progress Meetings
  • Earthwork Quantity Calculation
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SLIDE 8

Project Progress

Earthw ork

2 5 % 7 5 % Completed Remaining

Expenditures

2 0 % 8 0 % Billed Remaining

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SLIDE 9
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SLIDE 10
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SLIDE 11

Lessons Learned

  • Force template drops at each

horizontal/ vertical cardinal station, superelevation event, begin/ end of transitions, etc.

  • Use continuous breaklines as

much as possible

  • Provide surfaces for each

subsurface layer

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SLIDE 12

Lessons Learned

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SLIDE 13

Lessons Learned

  • Don’t forget to model lane

additions/ drops, widening for guardrail end treatments, etc.

  • Pay close attention when

modeling intersections, gore areas, etc.

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SLIDE 14

Which way do we go?

  • 2nd pilot project
  • 3D Modeling guidelines

– And 3D Model expectations – Diminishing Return?

  • Update electronic submittals
  • Standard naming convention?
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SLIDE 15

Electronic Submittals

  • DXF files
  • Coordinate Control file
  • Cross Section Report file
  • Expanded surface files
  • File Index
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SLIDE 16

3D Resources

  • www.fhwa.dot.gov/ 3d

– Technical Support Service Center

  • FHWA web-based training

modules

  • KYTC Highway Design Webinars

– http: / / transportation.ky.gov/ High way-Design/ Pages/ Software-and- Support.aspx

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SLIDE 17

Questions?

Kevin Martin, PE TEBM Developm ental Kevin.Martin@ky.gov Jason Littleton, PE Project Engineer Jason.Littleton@ky.gov