Loading Your Files
1. Go to Start>Programs>Bentley>InRoads Group XM and load the product “Bentley Rail Track”.
2. From
Starting a Vertical Alignment using Single Element
Regression Analysis (SERV)
With the location of the horizontal alignment in place, the next step in designing a railway is the definition of the design grade line or vertical alignment. Before you define the vertical alignment, you extract a profile of the original surface along
he horizontal alignment. Then, use the surface profile as a reference for designing the vertical alignment. The profile appears in the drawing file in a rectangular box, referred to as the profile window. As you add segments to the vertical
alignment, they appear in the profile window. This topic covers profile generation and starting the vertical alignment layout within the profile.
Before Getting Started
Locate the tutorial data in C:\Program
\Bentley\Tutorials\Rail. Extract RailChapter11.exe oading Your Files
Go to Start>Programs>Bentley>InRoads Group XM and load the product “Bentley Rail Track”.
From C:\Program Files\Bentley\Tutorials\Rail rail_tutorial.dgn or rail_tutorial.dwg file.
Click File > Open.
Set the directory to C:\Program Files\Bentley\Tutorials\Rail.
Select railm_tut.xin, and click Open.
Starting a Vertical Alignment using
Regression Analysis
With the location of the horizontal alignment in place, the next step in designing a railway is the definition of the design grade line or vertical alignment. Before you define the vertical alignment, you extract a profile of the original surface along
he horizontal alignment. Then, use the surface profile as a reference for designing the vertical alignment. The profile appears in the drawing file in a rectangular box, referred to as the profile window. As you add segments to the vertical
hey appear in the profile window. This topic covers profile generation and starting the vertical alignment layout
RailChapter11.exe.
Go to Start>Programs>Bentley>InRoads Group XM and Rail open the
6. Select 7. Select
8. Click Cancel to dismiss the dialog box.
Generating a Profile Along an Ali
Next, extract a profile, which represents the elevation of the surface
1. Click Evaluation > Profile > Create Profile.
2. Click Preferences.
3. Under Name, sel
have been previously prepared for this topic.
4. Click Load.
5. Click Close.
6. Under Symbology in the Display column, make sure the surface
7. Click the Include leaf. Make sure that all options are turned of
8. Click Apply, and place a data point somewhere to the right of the surface
This location identifies the origin of the axes used in the profile generation (justified about the lower
and Bentley Rail Track extracts and displays the the specified point.
Select existing.dtm, and click Open.
Select singletrack.alg, and click Open.
Click Cancel to dismiss the dialog box.
Generating a Profile Along an Alignment
Next, extract a profile, which represents the elevation of the surface existing along the horizontal alignment centerline.
Click Evaluation > Profile > Create Profile.
Click Preferences.
Under Name, select metric profile. The profile settings have been previously prepared for this topic.
Click Load.
Click Close.
Under Symbology in the Display column, make sure the surface existing is ON.
Click the Include leaf. Make sure that all options are turned off.
Click Apply, and place a data point somewhere to the right of the surface existing.
This location identifies the origin of the axes used in the profile generation (justified about the lower-left corner), and Bentley Rail Track extracts and displays the
the specified point.
Next, extract a profile, which represents the elevation of the along the horizontal alignment centerline.
ect metric profile. The profile settings
Under Symbology in the Display column, make sure the Click the Include leaf. Make sure that all options are Click Apply, and place a data point somewhere to the right
This location identifies the origin of the axes used in the left corner), and Bentley Rail Track extracts and displays the profile at
The graphics in the profile show the elevation of the
existing ground along the path of the horizontal alignment.
NOTE: If the profile is un extract the
through steps 1 through 8 again.
9. When you are finished, click Close to dismiss the Create Profile dialog box.
10. Using your CAD software, save the rail_tutorial.dwg
Using Single Vertical Element Regression Analysis Once regression points have been added to the profile, you can begin adding elements to the vertical alignment. When working with regression data, you can add, modify and delete points using the command dialog box or by graphi
points in the graphic view. In this topic, you will select points graphically in the view. Begin by loading the regression points into the vertical alignment. Vertical regression points will be loaded from the regression points in the ac
alignment.
1. Click Geometry > Vertical Regression > Add Regression Points.
2. Click Apply; then Close. No points will be listed in the dialog box.
Next, confirm that the points were loaded.
3. Click Geometry > Vertical Regression > Edit/Review Regression Points.
The graphics in the profile show the elevation of the
existing ground along the path of the horizontal alignment.
NOTE: If the profile is un-readable, it may be necessary to extract the railm_tut.xin from railchapter11.exe
through steps 1 through 8 again.
When you are finished, click Close to dismiss the Create Profile dialog box.
Using your CAD software, save the rail_tutorial.dgn rail_tutorial.dwg file.
Using Single Vertical Element Regression Analysis Once regression points have been added to the profile, you can begin adding elements to the vertical alignment. When working with regression data, you can add, modify and delete points using the command dialog box or by graphically selecting points in the graphic view. In this topic, you will select points graphically in the view. Begin by loading the regression points into the vertical alignment. Vertical regression points will be loaded from the regression points in the active horizontal alignment.
Click Geometry > Vertical Regression > Add Regression Points.
Click Apply; then Close. No points will be listed in the dialog box.
Next, confirm that the points were loaded.
Click Geometry > Vertical Regression > Edit/Review egression Points.
The graphics in the profile show the elevation of the
existing ground along the path of the horizontal alignment.
readable, it may be necessary to .exe and go
When you are finished, click Close to dismiss the Create rail_tutorial.dgn or
Using Single Vertical Element Regression Analysis Once regression points have been added to the profile, you can begin adding elements to the vertical alignment. When working with regression data, you can add, modify and delete points
cally selecting points in the graphic view. In this topic, you will select points graphically in the view. Begin by loading the regression points into the vertical alignment. Vertical regression points will be
tive horizontal Click Geometry > Vertical Regression > Add Regression
Click Apply; then Close. No points will be listed in the
Click Geometry > Vertical Regression > Edit/Review
4. Scroll down and confirm all 163 points were loaded; then, close the dialog box.
Next, display and view the points in the profile.
5. Click Geometry > Vertical Regression > View Vertical Regression Points.
6. Click Apply; then, Close.
7. Zoom in
Now, place elements in the vertical alignment based on the regression points. Select the first set of points.
8. Click Geometry > Vertical Regression > Edit/Review Regression Points.
9. Click the Select button.
10. Graphically select points 1 zoom in the view.
11. Accept the points.
Scroll down and confirm all 163 points were loaded; then, close the dialog box.
Next, display and view the points in the profile.
Click Geometry > Vertical Regression > View Vertical Regression Points.
Click Apply; then, Close.
Zoom in to see the points.
Now, place elements in the vertical alignment based on the regression points. Select the first set of points.
Click Geometry > Vertical Regression > Edit/Review Regression Points.
Click the Select button.
Graphically select points 1 through 26. You may have to zoom in the view.
Accept the points.
Scroll down and confirm all 163 points were loaded; then, Next, display and view the points in the profile.
Click Geometry > Vertical Regression > View Vertical
Now, place elements in the vertical alignment based on the regression points. Select the first set of points.
Click Geometry > Vertical Regression > Edit/Review
through 26. You may have to
The points are highlighted in the Edit/Review Vertical Regression Points dialog box:
12. Collapse, do not close, the dialog box.
13. Click Geometry > Vertical Regression > Single Element Regression Analysis.
14. For Element type, select Line.
This indicates that points 1 through 26 will be regressed as a line in the alignment.
15. For Save Order, select Last Element.
16. Click Compute.
The results of the computation are displayed in the Results field.
17. Click Save.
Regressing through points 1 through 26, you have added a linear element to the vertical alignment. Next, you will move along the points to add another element.
18. Uncollapse the Edit/Review Vertical Regression dialog box.
19. Click the Select button.
20. In
select them all in one view, remember that you can multi select in the dialog box.
21. Accept the points.
22. Redisplay the Single Element Vertical Regression dialog box.
23. For element select Line.
24. For Save 25. Click Compute.
The line is added to the alignment.
26. Click Save; then, Close.
27. Close all dialog boxes.
Now is a good time to save the geometry project.
28. Click File > Save > Geometry Project.
Regressing through points 1 through 26, you have added a linear element to the vertical alignment. Next, you will move along the points to add another element.
Uncollapse the Edit/Review Vertical Regression dialog box.
Click the Select button.
the graphic view, select points 69 to 105. If you can’t select them all in one view, remember that you can multi select in the dialog box.
Accept the points.
Redisplay the Single Element Vertical Regression dialog box.
For element select Line.
For Save Order, select Last Element.
Click Compute.
The line is added to the alignment.
Click Save; then, Close.
Close all dialog boxes.
Now is a good time to save the geometry project.
Click File > Save > Geometry Project.
Regressing through points 1 through 26, you have added a linear element to the vertical alignment. Next, you will Uncollapse the Edit/Review Vertical Regression dialog box.
the graphic view, select points 69 to 105. If you can’t select them all in one view, remember that you can
multi-Redisplay the Single Element Vertical Regression dialog
Now is a good time to save the geometry project.
29. Click File > Exit and exit your CAD software, or continue to Chapter 12, Building a Vertical Alignment using Multiple Element Connection.
11
Overview
In this chapter, you will connect existing vertical elements using the Bentley Rail Track geometry commands.
Before Getting Started
Locate the tutorial data in Files\
Loading Your Files
1. Go to Start>Programs>Bentley>InRoads Group XM and load the product “Bentley Rail Track”.
2. From
8. Click Cancel to dismiss the dialog box.
Using Multiple Vertical Element Connection Bentley Rail Track provides several metho
vertical alignment. One approach lets you add points of intersection (PIs) and curve sets. Another method defines the geometry by vertical element design. Finally, you can create a vertical alignment using multiple element connection a