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
Building a Vertical Alignment using Multiple Element Connection (MEC)
In this chapter, you will connect existing vertical elements using the Bentley Rail Track geometry commands.
Before Getting Started
Locate the tutorial data in C:\Program
\Bentley\Tutorials\Rail. Extract RailChapter12.exe Loading 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.
Select existing.dtm, and click Open.
Select singletrack.alg, and click Open.
Click Cancel to dismiss the dialog box.
Using Multiple Vertical Element Connection Bentley Rail Track provides several methods for creating a 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
Building a Vertical Alignment using Multiple Element Connection (MEC)
In this chapter, you will connect existing vertical elements
RailChapter12.exe.
Go to Start>Programs>Bentley>InRoads Group XM and Rail open the
Using Multiple Vertical Element Connection ds for creating a 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 and
regression analysis. In this task, you will build on an existing vertical alignment using multiple element connection. In the tutorial topic
Element Regression Analysis
with vertical multiple element regression analysis.
Begin by viewing the current active vertical alignment.
1. Click Geometry > View Geometry > Active Vertical.
Next, fit a parabola between the linear elements.
2. Click Geometry > Vertical Regression > Multiple Regression Analysis.
3. Under Beginning Element, click
4. Click on the first element in the alignment.
5. Under Ending Element, click Select.
6. Click on the second element.
regression analysis. In this task, you will build on an existing vertical alignment using multiple element connection. In the tutorial topic Completing a Vertical Alignment using Multiple Element Regression Analysis, you can complete the alignment
h vertical multiple element regression analysis.
Begin by viewing the current active vertical alignment.
Click Geometry > View Geometry > Active Vertical.
Next, fit a parabola between the linear elements.
Click Geometry > Vertical Regression > Multiple Regression Analysis.
Under Beginning Element, click Select. Click on the first element in the alignment.
Under Ending Element, click Select.
Click on the second element.
regression analysis. In this task, you will build on an existing vertical alignment using multiple element connection. In the
Completing a Vertical Alignment using Multiple , you can complete the alignment Begin by viewing the current active vertical alignment.
Click Geometry > View Geometry > Active Vertical.
Next, fit a parabola between the linear elements.
Click Geometry > Vertical Regression > Multiple Element
Notice that the length is displayed in the dialog box.
7. Click Add After
8. For Type, select Parabola.
9. For Length, type
This is an initial “best guess” for these values.
10. For the K value, type
11. Click Apply; then, click Close.
The defined parabola parameters are displayed in the dialog box.
Notice that the length is displayed in the dialog box.
Click Add After.
For Type, select Parabola.
For Length, type 800. Press Tab.
This is an initial “best guess” for these values.
For the K value, type 200. Press Tab.
Click Apply; then, click Close.
The defined parabola parameters are displayed in the dialog box.
Notice that the length is displayed in the dialog box.
The defined parabola parameters are displayed in the
Notic
dialog box, you must indicate that you only seek a connection between elements, not a regression solution.
Make this distinction on the Advanced tab.
12. Click Advanced.
13. Ensure the Regression Analysis opti
14. Click the Main tab.
15. To provide a “best fit” for the new element, you must first
“free” elements and parameters to make the fit. For more information on parameters and regression analysis, see the InRoads Suite Help
16. Click Free for all
Notice that the element has not yet been placed. On this dialog box, you must indicate that you only seek a
connection between elements, not a regression solution.
Make this distinction on the Advanced tab.
Click Advanced.
Ensure the Regression Analysis option is turned OFF.
Click the Main tab.
To provide a “best fit” for the new element, you must first
“free” elements and parameters to make the fit. For more information on parameters and regression analysis, see the InRoads Suite Help.
Click Free for all three elements.
e that the element has not yet been placed. On this dialog box, you must indicate that you only seek a
connection between elements, not a regression solution.
on is turned OFF.
To provide a “best fit” for the new element, you must first
“free” elements and parameters to make the fit. For more information on parameters and regression analysis, see the
17. Click Apply.
The computed parabola connects the two elements.
The final computed parameters for the parabola are returned to the dialog box.
Notice that the estimated length of 800 is actually 799.178.
18. Click Save; then, Close.
Click Apply.
The computed parabola connects the two elements.
The final computed parameters for the parabola are returned to the dialog box.
Notice that the estimated length of 800 is actually 799.178.
Click Save; then, Close.
The computed parabola connects the two elements.
The final computed parameters for the parabola are
Notice that the estimated length of 800 is actually 799.178.
19. Click F
exit your CAD software, or continue to Chapter 13, Completing a Vertical Alignment using Multiple Element Regression Analysis.
Click File > Save > Geometry Project.Click File > Exit and exit your CAD software, or continue to Chapter 13,
Completing a Vertical Alignment using Multiple Element Regression Analysis.
ile > Save > Geometry Project.Click File > Exit and exit your CAD software, or continue to Chapter 13,
Completing a Vertical Alignment using Multiple Element
12
Overview
In this topic, you will complete a vertical alignment that contains two previously connected elements. The
serves as a railroad bed. You will accomplish this task using the multiple element regression analysis command. Regression analysis allows for a best fit geometric solution through
surveyed points.
Before Getting Started
Locate the tutorial data Files\
Loading Your Files
9. Go to Start>Programs>Bentley>InRoads Group XM and load the product “Bentley Rail Track”.
10. From
rail_tutorial.dgn 11. Click File > Open.
12. Set the directory to Files
13. Select 14. Select 15. Select
16. Click Cancel to dismiss the dialog box.