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 |
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 |
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.