Frank Nelson Burns

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Culvert Design with GEOPAK Drainage
Frank Nelson - Burns McDonnell
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GEOPAK Culvert Beats Nomographs

• Powerful tool for design analysis of culverts.
• Interacts with GPK, GSF, GDF, and/or tin files.

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GEOPAK Culvert Used on 2 Recent Projects

• Fort Smith, AR Access Construction Roads for
  Dam Improvements Project for City of Fort Smith,
  AR.
• US 169 Oologah to Talala, OK Improving Rural
  2-Lane Road to 4-Lane Freeway for ODOT.

Project Areas
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Culvert Expedites Pipe Design at Fort Smith

• Project Schedule Compressed by Changes in Scope.
• 1.5 Miles of Access Roads 4.5 Miles of
  Construction Roads 15 Cross Road Culverts.
• Design Engineer Inexperienced in HH Design.

Project Area
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Good GEOPAK Design Starts with the Project Manager

• Opening Project Manager Provides a Smooth Setup
  of GEOPAK Preferences and Directories for Use in
  GEOPAK Drainage Culvert.

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Culvert Located In GEOPAK Drainage
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GEOPAK DRAINAGE TOOL BAR

• Drainage Project Must Be Added or Opened Before
  Culvert Can Be Used.

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Open GEOPAK Drainage File

• Contains All Previously Developed Information.
• Might Want to Keep a Spare.

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Preferences Set the Project Standards

• Preferences Defined on a Project by Project
  Basis.
• Fort Smith Preferences Different from US 169
  Preferences.

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Units A Critical Preference/Standard
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Project Components Where to Find Critical
Project Data

• Locations of Drainage Library Files (DLB), GPK
  No., Drainage Cell Library, Site Modeler File
  (GSF), Criteria Directory, and Superelevation
  Shapes.

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Rainfall Parameters for Runoff Calculations

• May or May Not Be Required With Culvert.
• Used in Runoff Calculations Rational Method or
  SCS TR-55.

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Land Use Options for Runoff Calculations
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Frequency Options for Runoff Calculations
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Intensity Option for Runoff Calculations
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Junction Losses for Storm Sewer Systems
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Inlet Options for Storm Sewer Systems
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Node Options for Culvert Headwalls
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Link Options Culvert Considers a Pipe a Link
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Design Symbology Paints a Pretty Picture
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Drainage Library 2nd Key Project Component

• Further Defines Project Standards, such as,
  Rainfall Data, Land Use, Runoff Coefficients,
  Nodes (Headwalls), Links (Pipes), Spread
  Sections.

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Rainfall Data Land Use Data for Runoff
Calculations

• Rainfall Data to Develop Intensity Data
  Curves.
• Land Use Data to Develop Runoff Coefficients.

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Headwalls Primary Node Type for Culverts

• Other Inlet and Outlet Nodes for Storm Sewer
  Systems.

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Node Items Can Be Modified

• Node Items Can Be
• Added
• Copied
• Pasted
• Modified
• Deleted and
• Printed.

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Links Come in a Variety of Shapes
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Links Come in a Variety of Materials
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Link Items Can Be Modified

• Link Items Can Be
• Added
• Copied
• Pasted
• Modified
• Deleted and
• Printed.

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Pipe Arch Links Require Dimensions

• Input of RC CM Pipe Dimensions Required for
  Pipe Arch Items for Drainage Library.

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Culvert Located Under Tools on Drainage Tool Bar
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Culvert Tool Bar

• Add
• Delete
• Modify
• ID Selected Culvert
• Close Culvert Session
• Show Cross Section
• Center Plan On Culvert

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Add Culvert Tool

• Most Recent Culvert Data Appears in Name and
  Description Input Blanks.
• Must All Be Replaced.

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Edit Culvert Tool

• Presently 5 Data Tabs
• 1st Data Tab Parameters
• Input Discharge Tailwater Elevation

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Configuration Tab Inputs Culvert Headwall
Characteristics

• Culvert
• Shape
• Material
• Size
• No. of Barrels
• Mannings n and
• Headwall Entrance Type

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Headwall Location Tab Allows a Variety of Input
Sources

• Can Be Tied to
• GEOPAK Reference Chain
• MicroStation Element
• TIN File
• Site Model or
• Input Data from User

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Overtopping Tab Not Used on Fort Smith Project
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Computation Tab Analyzes and Outputs Data
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Typical Data Output File for Lake Fort Smith
Cross Road Culvert
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US Highway 169 for Oklahoma DOT

• Improving 8 km of Rural 2-Lane Road to 4-Lane
  Freeway.
• 14 Cross Road Culverts 16 Section Line/Drive
  Culverts.
• 4 Cross Road Culvert Impacted by Backwater from
  Existing Backwater from Downstream RR Culverts.

Project Area
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Project Manager Opened to Set Project Standards
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US 169 - Metric Project
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US 169 - Different Project Components

• ODOT Specific Cell File.
• No Criteria File Directory.
• No Superelevation Shape Files

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Different Design Symbology Different Picture
to Meet ODOTRequirements
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Rainfall Data from ODOT Hydrology Manual
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Numerous Different Headwall Nodes on Project

• Cross Road Side Road Culverts Require a Number
  of ODOT Standard Headwalls.
• Most Side Road and Drive Culverts Require
  Sloping Headwalls.

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ODOT Cell Library Developed for Headwalls
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Project Included a Number of Metric RCB Culverts
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Discharge Tailwater Elevations Developed by
Spreadsheets Outside of GEOPAK
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Variety of Culverts Headwalls Used on Project
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US 169 - Typical Headwall Location Tab

• Headwalls for Cross Road Culverts Dynamically
  Placed.
• Headwalls for Section Line/Drive Culverts Placed
  by Keyin Determined by Spreadsheet.

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US 169- Flat Profiles Make Checking Overtopping
Critical

• Used Elevations Calculated by GEOPAK Culvert
  from Median Centerline PGL at Lowest Point Near
  Culvert for Cross Road Section Line Culverts.
• Elevations for Drive Overtopping Were Determined
  Input by User.

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Typical US 169 Computation Tab After Calculations
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Typical Data Output File for US 169 Cross Road
Culvert
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Profile/Section of Culvert

• All of the Information that Can Presently
  Developed in GEOPAK Culvert on Profile/Section of
  Culverts.
• 6th Tab - Culvert Profile is to be Developed by
  GEOPAK in the Future.

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GEOPAK or Nomographs - Its Your Choice!
OR
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QUESTIONS?