roadway designer resurfacing restoration and rehabilitation
DESCRIPTION
Roadway Designer Resurfacing Restoration and Rehabilitation. Kevin Jackson, Technical Director, TLI Bentley Systems, Inc. Roadway Designer Overlay Tools. Objectives – Overlay Components. Overlay Tools – Overlay / Stripping Components. Top Option Bottom Option Follow Surface - PowerPoint PPT PresentationTRANSCRIPT
Date
Roadway Designer Resurfacing Restoration and Rehabilitation
Kevin Jackson, Technical Director, TLIBentley Systems, Inc.
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Overlay / Milling
Components
Vertical Adjustment
s
Cross Slope
Optimization
Roadway Designer Overlay Tools
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Objectives – Overlay Components
Overlay Components
Stripping Components
Quantities and Reports
Cross Slope Optimization
Vertical Adjustments & Alignments
Overlay Tools – Overlay / Stripping Components
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Add New Component > Overlay/Stripping
• Top Option
• Bottom Option
• Follow Surface
• Follow Component
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Overlay Component
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• Create Pave + Overlay Template– Drag the Overlay_Only template into it so
that the bottom of pavement and Overlay points merge.
• Test
• Run Roadway Designer– Change to Pave+Overlay template– Note that Overlay now extends full width
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Stripping Component
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• Create a Pavement+Overlay template– Add a Milling Component– Match the bottom three points
• Test
• Create a Pavement + Overlay + Milling Component
• Run Roadway Designer
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Multiple Layers
• Different Overlay Layers?– Use Follow Lowest / Follow Highest
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• Review the 05_OverMill_Complicated Corridor (multiple overlay layers, saddlebags, quantities)
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• Standard: End-Area Volume Reports• Quick: Component Quantities
– Provides Component Quantities and Costs– Not exact: good for quickly comparing alternatives– For “complete” quantities use the full End-Area Volumes
functionality
Component Quantities
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• Run Roadway Designer
• Launch Component Quantities
• Walk the Corridor
• Disable Parametric Constraints
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• Reports on Overlay/Stripping components that have the Stripping option set.
• Milling Stylesheet (set Default)
Milling Report
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• Generate a Milling Report
Overlay Tools – Vertical Adjustments
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• Overlay
• Overlay + Max Milling
• Min. Milling w/ & w/o Max. Milling
Vertical Adjustment Scenarios
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• Structural Integrity of new Backbone• Minimum amount of overlay material (minimum overall
overlay thickness)• Full-width Milling• Milling: maximum depth of high-point milling
Vertical Adjustments: the Engineering
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• Given a template, it determines the Template Top.– This is the triangulated surface– Regardless of the complexity of the template, the Top is a
simple left-to-right linestring
• It compares the vertices in the Top to the vertices in the Active Surface
• It finds the Minimum (or Maximum) Vertical Difference value
• It adds the Backbone Thickness, Overlay and/or Milling values to determine an Adjustment Value.– Adjustment is completely independent of anything other than
the Top line and the Surface
Vertical Adjustments: the Methodology
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• Determined from Top segments in the template– Everything under the top ignored
• The Backbone Thickness is used in Adjustments
Template Top
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• Horizontal Range of Comparison must be defined
• Template Top– User Selects Two Template Points to define the left and right
ends
• Existing Ground Range– Use the Template Points used for the Top– Or - Follow Alignments, Features or Styles– Or - Fixed Offsets
Vertical Adjustments Horizontal Range
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• Solution Options– Compare at Template Points Only or at all Section Points– Maximum Difference can be set
Vertical Adjustments Comparisons
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Critical Points and Vertical Delta• Only Two Comparison Points/Vertical Deltas matter:
• Zero Overlay Point and Minimum Milling Point
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Vertical Adjustment GeometryCritical Point =
• Min. Milling Point for Min. Milling
• Zero Overlay Point for Overlay
Critical Delta =
• Existing Surface Elev. - Template Top Elev. at the Critical Point
• Direction matters
• + is up, - is down
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Minimum Milling•Top is moved to the lowest position where it intersects the existing surface•Establishes “Bottom” of backbone
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• Backbone Thickness (always positive) is added to the (positive or negative) Min. Milling Delta– Adjustment = Min. Milling Delta + Backbone Thickness
Backbone Thickness
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• In Roadway Designer select the 02_Pavement* Corridor
• Select Display Mode: Overlay
• Vertical Adjustments:
• Set Template & ex Ground Range
• Select Use Minimum Milling
• Walk the Corridor, observe
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• Step 1: Find the Minimum Overlay point: the intersection between the top and the existing ground where the Top is highest
Minimum Overlay
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• Minimum Overlay Value– Between Backbone Bottom and high point of existing
(Minimum/Zero Overlay Point)– Zero or greater– Added to Adjustment
Overlay Settings
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• Steps 2 and 3: Add the Minimum Overlay Value to the Zero Overlay Delta and add the Backbone Thickness
Minimum Overlay
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• In Roadway Designer select the 02_Pavement* Corridor
• Select Display Mode: Overlay
• Vertical Adjustments:
• Set Template & ex Ground Range
• BB=0, Min Overlay = 0
• Walk the Corridor, observe
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• Change the Backbone Thickness to 0.2 ft [0.1m]
• Walk the Corridor, observe
• Change the Minimum Overlay to 0.2 ft [0.1m]
• Walk the Corridor, observe
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• Sets a maximum limit to milling• Milling is limited to
– Maximum Milling Value or– Minimum Milling Point (full-width milling)
Minimum Milling with Maximum Milling
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• Set to Minimum Milling
• Select the Maximum Milling option
• Key in 0.1 [0.05]
• Walk the Corridor, observe
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• Mills out High Points• Requires less Overlay Material than with no milling• Can save significant money
Minimum Overlay with Max Milling
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• Milling Adjustment value is the last adjustment
• Total Adjustment is never negative
• Milling Adjustment is limited by– The Max Milling Value or– Zero Adjustment point
Minimum Overlay with Max Milling
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• Change the Maximum Milling depth to 0.1 [0.05]
• Walk the Corridor, observe
• Change the Corridor Vertical to None
• Walk the Corridor, observe
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• Vertical Adjustments do not require vertical alignments• Components behave the same regardless of how
they’re controlled vertically.
• To “Permanently Save” the Adjustments you’ll need to make an Alignment:– Smooth Adjusted Vertical Alignment– Apply Adjusted Vertical Alignment
• Final Cleanup: can use standard alignment tools
Vertical Alignments
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• Smooth the Vertical Adjustment
• Save the Vertical– envelopes
• Review the Vertical
• Push the Corridor w/o Adjustments (go w/ adj. to see if the Adjustment deviates from 0.0)– If different: verify that the Adjustment
settings were the same