Novapoint Online Documentation

Standard Cross-Section Wizard

MOUS_ICO Menu: Railway > Standard Cross-Section Wizard
MOUS_ICO Toolbar: Railway: Standard Cross-Section Wizard

Based on the values defined in 'Track Data', this function will construct the railway model. The cross-section details, mentioned below are to be defined.

  • Railway Model Section: The stretch of the alignment along which railway model is to be constructed.
  • Rail and Ballast Description: The rails, sleepers to be used and the ballast height are to be defined.
  • Substructure Description: The substructure cross-section details as widths, slopes and thickness are to be defined.
  • Calculation options: Mark the options which are to be included in calculations.
  • Calculation process and results can be viewed in the dialog box 'Building Activity'.
  • The cross-sections can be viewed in the dialog box 'Cross Sections'.
  • The subsurface description will be exported to 'Railway Design (Subsurface)'.
  • The superstructure description can be viewed or modified with this function alone.
  • The substructure description can be viewed or modified either with this function or 'Railway Design (Substructure)'.

Step 1 - Railway Model Section

The section along which railway model is to be constructed is defined in this dialog box.

  • The 'Track Data' is to be defined before constructing the railway model.
  • The 'Track ID' (Reference alignment), 'From Station' and 'To Station' of the reference alignment along which railway model is being constructed are mapped at respective fields under the heading 'Reference Track'.
  • Define the section ('From Station' and 'To Station') for which railway model is to be constructed.
  • If 'Track Data' details are to be changed, exit the function 'Standard Cross Section Wizard' and run the function 'Track Data'.

The dialog box 'Railway Cross-Section Wizard' will pop up.

Define the section and click 'Next >' to define the 'Rail and Ballast Description'.

Step 2 - Rail and Ballast Description

The Rail, Sleeper and Ballast Description are defined here. These values can be define in two way:

  • Manually specify the value at respective fields.
  • Select the pre-defined rail/sleeper from the respective pull down menus.
  • Select pre-defined rail from the pull down menu. The height of the rail and proposed height of ballast will be displayed at respective fields of column 'Height'.
  • User can edit the values.
  • Select pre-defined sleeper from the pull down menu. The length of the sleeper, proposed ballast shoulder and ballast slope will be displayed at respective fields of the columns 'Width' and 'Slope'.
  • User can edit the values.

The following details are to be defined:

  • Rail height
  • Ballast height
  • Sleeper length
  • Ballast shoulder
  • Ballast slope

Position of alignment

  • Horizontal geometry is located at centre of track.
  • Vertical geometry is located at the lowest rail's top surface.

The dialog box is shown below.

Formation Level

The vertical offset from the lowest rail's top surface to the formation level is displayed here. This is the sum of the heights rail and ballast.

Tip: Use the value at the field 'Formation Level' as verification of the vertical offset from the lowest rail to the formation level.

View Parameters

View the graphical representation of all the parameters of the dialog box.

Click the button 'Next >' to define 'Substructure Description'.

Step 3 - Substructure Description

Based on the values defined in this dialog box and the 'Track Identification' values, the substructure cross-section of railway model is constructed.

  • Manually specify the values.
  • Only the white cells are to be used.
  • By default Novapoint Railway will suggest the values. User can edit the values.

View Parameters

View the graphical representation of all the parameters of the dialog box.

Formation Right/Left

  • The values defined for these parameters and the values defined in 'Track Identification' gives the formation width.
  • In case of double track with one reference line, 'Track Distance' is used along with these values to obtain formation width.
  • In case of double track with two reference lines, the horizontal distance between two reference lines is used along with these values to obtain formation width.

Ditch

  • Ld: Horizontal offset from formation edge to ditch inner edge.
  • Sd: Slope from formation level to ditch bottom.
  • Using the values the depth of the ditch from the formation level is calculated.
  • Ldb: Ditch width.
  • Sdb: Ditch bottom slope.
  • Sc: Slope for Soil cut.
  • Sr: Slope for Rock cut.

Note: The subsurface details of the terrain are to be defined so that 'Rock Cut' details can be used effectively.

Substructure Layers

  • Specify the substructure layers defining the thickness for the required layers.

Click the button 'Next >' to select the 'Calculate Options'.

Step 4 - Calculation Options

Constructing railway model involves calculation of ballast including rails and sleepers with described cant, and the substructure including formation level, surfaces and substructure layers.

  • The results of the ballast calculation are stored in a file with extension BBL (<Railway Project Name>.BBL). The file can be found in the current project's folder. The same file can be used for quantity calculation using the tool 'Railway Superstructure Quantities'.
  • The result of the substructure calculation (using 'Railway Design (Substructure)') is a complete railway model but without the ballast, sleeper and rail descriptions.
  • By default Novapoint Railway will calculate all the listed options, but user can opt to ignore some of them. These options are useful when user is doing iterations.

While doing iterations, based on the changes made, all of these need not be calculated. For e.g.:

  • If the cant values ('Cant Setting') are modified, Ballast alone will be affected. In such case, ballast alone needs to be calculated.
  • If 'Substructure Description' is modified, Ballast and Formation Level need not be calculated.
  • Show Calculated Cross-Sections: Mark this check box to view the calculated cross-section in dialog 'Cross-Sections'.

The cross-section interval for constructing the railway model is defined here.

Press 'Calculate' to construct the railway model.

  • If user is performing this task for the second time, as there exists a surface description of previous calculations, Novapoint Railway will prompt for: 'Confirm Replace Surface-Description'. Click 'Yes' to reconstruct the railway model.
  • The calculation process and the result will be displayed in the dialog box 'Building Activity'.
  • Make sure that there are no errors.
  • Description of errors and warning can be viewed using the button 'Errors and Warnings' of the dialog box 'Building Activity'.
  • The cross-sections can be viewed in the dialog box 'Cross-Section' which pop up after calculation is finished if the option 'Show Calculated Cross-Sections' is marked.

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