Milling and Overlay

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Milling and Overlay

Updated November 12, 2018


This article applies to:
  • RoadEng Civil

This example explains how to calculate milling and overlay volumes.


Download the sample files used with this example: HERE.

Download a PDF of the example HERE.


This example uses a specific E-library template component, MillOverlay VII - CL Offsets, located in the Overlay and Widenings folder. The operation and behavior of this component is explained.

Creating Reference Features - Lane and Shoulder

  • Open the Location module. Open MillFill.DSNX (included with this example). The screen should now display a cross section and a profile view as shown in Figure 1.

Figure 1 – MillFill.DSNX

  • Choose menu Setup | Location Setup | Alignment | Features. Setup Reference Features RF 1 and RF 2 as shown in Figure 2 below:
    • RF 1 -> RD RT-LANE-168
    • RF 2 -> RD RT-PAVE EDGE-173

Figure 2 – Setting up Lane and Shoulder Reference Features.

  • For both the reference features, make sure the Section tab setting is set to Intersection and that an appropriate symbol is chosen to display the reference features (see Figure 3 and 4 below):

Figure 3 – Setting up Cross Section Display of Reference Features

Figure 4 - Cross Section Display of Reference Features

Applying the Mill and Overlay Template

  • Choose menu Home| Templates | E-Library and choose Overlays and Widenings, press OK.

Figure 5 – E-library Overlays and Widenings

  • In the downloaded folder ( Overlays and Widenings), select MillOverlay VII and choose Copy (from the right click menu). Click on the DF - Default template and choose Paste | As New (from the right click menu).
  • Remove the Roadway, Ditches and Slopes components in the DF- Default template (select them and press the delete button).
  • Flip the MillOverlay VII object to the right by clicking on it and selecting menu Flip. The DF - Default template should now appear as shown in Figure 6 below.


Figure 6 – Default Template with MillOverlay VII on the right side

Setting Up The Mill/Overlay Parameters

  • Right click while the MillOverlay VII is selected and choose menu Properties. Set the following parameters:

Variable

Value

Description

OverlayThick

.05

Thickness of overlay measured from existing CL elevation.

OverlayLaneDX

Reference Feature 1
(ROAD RT LANE-168)

Lane (inside) overlay offset from CL.If 0, it is ignored (only EOP will be used).

OverlayLaneSlp

-9999.0

Slope of lane (inside) overlay. If set to -9999, parameters OverlayLaneDX/DYwill be used to determine slope.Super/Crown is added to this value.

OverlayShldrDX

Reference Feature 2

(RD RT PAVE EDGE-173)

Shoulder overlay offset (measured from CL to toe of new overlay pavement).

OverlayShldrWidth

0.0

Shoulder width. If 0, the shoulder will be calculated based on OverlayShldrDX position.

OverlayShldrSlp

-9999.0

If set to -9999, parameters OverlayShldrDX/DYwill be used to determine slope.Super/Crown is added to this value.

OverlayFillSlp

33.3

Outside fill slope of overlay.

MillLaneDepth

.06

Milling depth of lane (inside shoulder).

MillLaneDX

Reference Feature 1
(ROAD RT LANE-168)

Horizontal offset from C/L for lane milling.

MillLaneSlp

-9999.0

Slope of lane (inside) milling. If set to -9999, parameter MillLaneDX/DYwill be used to determine slope.Super/Crown is added to this value.

MillShldrDepth

.03

Depth of milling beyond the shoulder.

MillShldrSlp

-9999.0

If set to -9999, parameters MillShldrDX/DY(see advanced) will be used to determine slope.Super/Crown is added to this value.

MillDaylightSlope

-2.0

If set to -9999, parameters MillShldrDX/DY(see advanced) will be used to determine slope.Super/Crown is added to this value.

  • Press OK twice.When prompted, Recalculate Range.
  • The screen should appear as shown below.

Figure 7 – Mill Fill Section with Filled Areas Highlighted

This completes the example.

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