This subassembly creates corridor-side daylighting links with user-defined slope configurations, such as flat, medium, and maximum slopes for cut and fill situations.
This subassembly creates either a v-shaped or flat- bottom ditch in cut situations, and includes an option to include guardrail widening for steep fill conditions.
The final daylighting link can be omitted for cases where the corridor model needs to be left in an incomplete state. For example, this might be done so that grading surfaces on adjacent properties can tie to the hinge point on the uncompleted roadway.
You can also specify optional lined materials for daylight and other links (All Links, Daylight Links, Fill Links Only, and None).
Attachment
This subassembly is typically attached to the subassembly used at the outside edge of the roadway, such as the edge of shoulder, back of sidewalk, or back of curb. The attachment point is at the inside edge of the ditch front link, the top of the flat or medium fill slope, or inside edge of guardrail widening link, depending on conditions.
Input Parameters
Note: All dimensions are in meters or feet unless otherwise noted. All slopes are in run-over-rise form (for example, 4 : 1) unless indicated as a percent slope with a “%” sign.
|
Parameter |
Description |
Type |
Default |
|---|---|---|---|
|
Side |
Specifies which side to place the subassembly |
Left / Right |
Right |
|
Include Daylight Link Omit Daylight Link |
Include or omit the Daylight link. |
Include / Omit |
Include |
|
Flat Cut Slope |
First, flattest, catch slope to attempt. (x : 1) |
Numeric, positive |
6 ( : 1) |
|
Flat Cut Max Height |
Maximum allowable height of the closing link using the Flat Cut Slope |
Numeric |
1.5 m 5 ft |
|
Medium Cut Slope |
Cut slope to attempt if the Flat Cut Slope link exceeds the Flat Cut Max Height |
Numeric, positive |
4 ( : 1) |
|
Medium Cut Max Height |
Maximum allowable height of the closing link using the Medium Cut Slope |
Numeric |
3 m 10 ft |
|
Steep Cut Slope |
Cut slope to use if the Medium Cut Slope link exceeds the Medium Cut Max Height |
Numeric, positive |
2 ( : 1) |
|
Foreslope Width |
For cut sections, the width of the front-of-ditch link |
Numeric |
3.6 m 12 ft |
|
Foreslope Slope |
Slope of the front-of-ditch link (x : 1). This link is always inserted downwards. |
Numeric, positive |
4 ( : 1) |
|
Ditch Width |
Width of the bottom of ditch. Use zero for a V-ditch. |
Numeric, positive |
1 m 3 ft |
|
Flat Fill Slope |
First, flattest, catch slope to attempt. (x : 1) |
Numeric, positive |
6 ( : 1) |
|
Flat Fill Max Height |
Maximum allowable height of the closing link using the Flat Fill Slope |
Numeric |
1.5 m 5 ft |
|
Medium Fill Slope |
Fill slope to attempt if the Flat Fill Slope link exceeds the Flat Fill Max Height |
Numeric, positive |
4 ( : 1) |
|
Medium Fill Max Height |
Maximum allowable height of the closing link using the Medium Fill Slope |
Numeric |
3 m 10 ft |
|
Steep Fill Slope |
Fill slope to use if the Medium Fill Slope link exceeds the Medium Fill Max Height |
Numeric, positive |
2 ( : 1) |
|
Guardrail Width |
Width of the guardrail widening link for fill slopes using Steep Fill Slope. Use zero for no guardrail widening. |
Numeric, positive |
0.6 m 2 ft |
|
Guardrail %Slope |
% slope of the guardrail widening link |
Numeric |
-2 (%) |
|
Include Guardrail Omit Guardrail |
Include to insert the guardrail structure when guardrail widening occurs. Omit does not insert the guardrail structure. |
Include / Omit |
Omit |
|
Width to Post |
When the guardrail is included, the width from the attachment point to the inside edge of the guardrail post. |
Numeric |
0.3 m 1 ft |
|
Rounding Option |
Specifies to round off the daylight link at the catch point |
String |
None |
|
Rounding By |
Specifies what parameter is used for rounding |
String |
Length |
|
Rounding Parameter |
Specifies value for length or radius |
Numeric, positive |
1.500 ft |
|
Rounding Tesselation |
Specifies number of intermittent points on rounding links (maximum 10 links) |
Numeric, positive |
6 |
|
Place Lined Material |
Specifies to place optional material lining along daylight links. You can choose All Links, Daylight Links, Fill Links Only, and None. |
String |
None |
|
Slope Limit 1 |
Specifies the slope limit until which the associated material lining is placed |
Slope |
1 : 1 |
|
Material 1 Thickness |
Specifies the thickness of lined material. This thickness is measured perpendicular to the link. |
Numeric, positive |
12 inches |
|
Material 1 Name |
Specifies the name of the material applies for lining along grading links |
String |
Rip Rap |
|
Slope Limit 2 |
Specifies the slope limit until which the associated material lining is placed |
Slope |
2 : 1 |
|
Material 2 Thickness |
Specifies the thickness of lined material. This thickness is measured perpendicular to the link. |
Numeric, positive |
6 inches |
|
Material 2 Name |
Specifies the name of the material applies for lining along grading links |
String |
Rip Rap |
|
Slope Limit 3 |
Specifies the slope limit until which the associated material lining is placed |
Slope |
4 : 1 |
|
Material 3 Thickness |
Specifies the thickness of lined material. This thickness is measured perpendicular to the link. |
Numeric, positive |
4 inches |
|
Material 3 Name |
Specifies the name of the material applies for lining along grading links |
String |
Seeded Grass |
Target Parameters
This section lists the parameters in this subassembly that can be mapped to one or more target objects. For more information, see To Specify Corridor Targets.
|
Parameter |
Description |
Status |
|---|---|---|
|
Daylight Surface |
Name of the daylighting surface. The following object types can be used as targets for specifying the surface: surfaces. |
Required |
Output Parameters
|
Parameter |
Description |
Type |
|---|---|---|
|
Daylight Offset |
Offset of the daylight point |
Numeric |
|
Daylight Elevation |
Elevation of the daylight point |
Numeric |
Behavior
The following steps are used by this subassembly to determine which conditions apply:
- The location of the Cut Test Point (see diagram) is calculated using the Foreslope Width, Foreslope Slope, and Ditch Width parameters.
- If any portion of the foreslope slope or ditch bottom is in cut, the section is computed as a cut section as follows:
- If the Cut Test Point is above the target surface, the Foreslope link or ditch bottom is truncated at the point where it intersects the surface going from cut to fill, otherwise:
- If Include Daylight Link is set to omit, no daylight link is calculated.
- The intercept to the target surface is calculated using the Flat Cut Slope value.
- If the height of the flat cut slope exceeds the Flat Cut Max Height, the intercept to the target surface is re-calculated using the Medium Cut Slope value.
- If the height of the medium cut slope exceeds the Medium Cut Max Height, the intercept to the target surface is re-calculated using the Steep Cut Slope value.
- If the Cut Test Point is above the target surface, the Foreslope link or ditch bottom is truncated at the point where it intersects the surface going from cut to fill, otherwise:
- If no portion of the foreslope link or ditch bottom is below the target surface, the section is computed as a Fill section as follows:
- The intercept to the target surface is calculated using the Flat Fill Slope value.
- If the height of the flat fill slope exceeds the Flat Fill Max Height, the intercept to the target surface is re-calculated using the Medium Fill Slope value.
- If the height of the medium fill slope exceeds the Medium Fill Max Height, the guardrail widening link is added to the assembly using the Guardrail Width and Guardrail %Slope parameters (unless the Guardrail Width is zero). The intercept to the target surface is re-calculated from the outside edge of the guardrail widening link using the Steep Fill Slope value.
- If Include Daylight Link is True, the flat, medium, or steep fill slope link is added to the assembly.
A guardrail structure may be applied to fill sections that meet the criteria for using the steep fill slope. If this criteria is met, the Guardrail Width is not zero, and Include Guardrail is set to true, then a guardrail structure is drawn at the station. The dimensions of the guardrail structure are fixed as shown in the diagram below.
Like other daylight subassemblies, this subassembly optionally lets you add a lined material. You can specify three ranges of slopes. Material type 1 is applied if the slope of the links is up to the specified slope value. From slope 1 to slope 2, the second type of material applied. Similarly, if the slopes of links fall within slope 2 and slope 3 values, then material 3 is applied. If the link slopes are flatter than slope limit 3, then no material is applied.
If a lined material is added to the subassembly, then parallel links are added to the daylight links with specified thickness. This thickness parameter (for example, Material 1 Thickness) is measured perpendicular to the link. Bottom level links are coded with Datum and daylight links are coded with Top. Shapes enclosed by these materials are coded with material name.
In Civil 3D 2010 and previous versions, the Material Thickness parameter was measured vertically. In Civil 3D 2011 and later, this parameter is measured perpendicular to the link. Therefore, if you open a drawing containing these subassemblies that was created in Civil 3D 2010 or prior in Civil 3D 2011 or later, and then rebuild the corridor(s), this parameter will be changed to reflect the new behavior. Any volume reports that use this subassembly will be updated to reflect the new behavior.
Layout Mode Operation
In layout mode, this subassembly shows both the cut and fill flat-slope conditions. The daylight links are extended outward for a horizontal distance of 3 meters or 10 feet, and are shown in dashed lines terminating in arrowheads pointing outwards.
Point, Link, and Shape Codes
The following table lists the point, link, and shape codes for this subassembly that have codes assigned to them. Point, link, or shape codes for this subassembly that do not have codes assigned are not included in this table.
|
Point, Link, or Shape |
Code |
Description |
|---|---|---|
|
P1 |
Hinge Hinge_Fill |
Hinge point for the normal fill condition |
|
P2 |
Hinge Hinge_Fill |
Hinge point for the fill condition with guardrail widening |
|
P2 |
Ditch_In |
Inside edge of the bottom of the ditch (cut condition only) |
|
P3 |
Ditch_Out Hinge Hinge_Cut |
Outside edge of the bottom of the ditch (cut condition only) |
|
P3 |
Daylight Daylight_Fill |
Fill slope stake point (fill condition only) |
|
P4 |
Daylight Daylight_Cut |
Cut slope stake point (cut condition only) |
|
All Links |
Top Datum |
All links added by this subassembly, except for the guardrail structure links. |
|
Guardrail points |
None |
No codes are assigned to the points on the guardrail structure, if included. |
|
Guardrail links |
Guardrail |
All links comprising the guardrail structure, if included. |
|
L3 |
Top Datum Daylight Daylight_Cut |
Daylight link for cut section |
|
Fill Daylight Link |
Top Datum Daylight Daylight_Fill |
Daylight link for fill section |
Coding Diagram
