STN01

Stationing on alignment without broken chainage

Test code	Test author	Test dataset source	Test direction
STN01	Ciro Vendrame	RFI	Export

Intent

This test case addresses the export of the required IFC entities for the exchange of data related to Stationing on alignment without broken chainage.

Main IFC concept involved in this test

• Project Global Positioning
• Alignment Layout
• Spatial Decomposition
• Spatial Containment
• Alignment Geometry
• Alignment Geometry Gradient
• Alignment Geometry Cant
• Product Linear Placement
• Product Local Placement
• Product Shape

Prerequisites

All validation criteria (and usages) of prerequisites' tests shall be verified for this test too (regression test principle). Prerequisites for the present test case are listed below.

Test code	Test title	Comments
PJ01	Project Setup	none
GL01	Global Positioning RFI dataset	none

Test dataset (input)

This test case utilises the dataset collected in the Dataset folder and summarised in the table below. For more details on each item see Dataset description.

Filename (format)	Description
LineLayout.svg	Schematic line layout of the test case
Alignment_horizontal.csv	Alignment parameters for horizontal segments
Alignment_vertical.csv	Alignment parameters for vertical segments
Alignment_cant.csv	Alignment parameters for cant segments
Alignment_exchange.xml	Alignment description in LandXML file format
Alignment_2D_with_stationing_values.dxf	2D CAD model of the alignment with mileage referents (dxf file)
Alignment_3D_with_signals.dxf	3D CAD model of the alignment with 2 signals (dxf file)
Stationing_values.csv	Stationing values according to national conventions
Stationing_values_horizontal_segments.csv	Stationing values of the horizontal segments
Stationing_values_vertical_segments.csv	Stationing values of the vertical segments
Signal_3D.dxf	3D CAD model of the signal (dxf file)
Signals_positions.csv	Signals positions parameters
Stationing_values_signals.csv	Stationing values of the signals
Geographic_Coordinate_System.pdf	Geographic Coordinate System properties

Validation criteria

⚡ For this test case to be considered passed, all criteria listed in this section, and the ones of prerequisites tests shall be verified. ⚡

Formal rules

IFC standard (schema and specification)

When validated using the bSI Validation Service, the IFC must pass:

• Syntax & Schema check
• All following rules:
  • ALA001 - Alignment overall agreement of business logic and geometry
  • ALA002 - Alignment agreement on number of segments
  • ALA003 - Alignment same segment types in business logic and geometry
  • ALB003 - Alignment nesting
  • ALB004 - Alignment in spatial structure relationships
  • ALB015 - Alignment business logic zero length final segment
  • ALS004 - Alignment segment shape representation
  • ALS005 - Alignment shape representation
  • ALS006 - Alignment horizontal shape representation
  • ALS007 - Alignment vertical shape representation
  • ALS008 - Alignment cant shape representation
  • ALS010 - Alignment segment shape representation has the correct number of items
  • ALS015 - Alignment representation zero length final segment
  • TBD000 - Stationing along alignment (RI-7)

Test case-specific checks

Covered by this IDS file: STN01.ids

• (RI-18) Each IfcProduct (and subtypes) must have the attribute Name not null and not empty
• (RI-4) An IfcProject must have the attribute Description not null and not empty
• There must be 1 instance(s) of IfcAlignment and must be named Track alignment,its PredefinedType must be USERDEFINED and its ObjectType must be Railway track alignment
• There must be 1 instance(s) of IfcAlignmentHorizontal and must be named H1
• There must be 1 instance(s) of IfcAlignmentVertical and must be named V1
• There must be 1 instance(s) of IfcAlignmentCant and must be named C1
• There must be 2 instance(s) of IfcSignal and must be named Route Indicator_01, Route Indicator_02
• (RI-8) The horizontal layout must include only the following types of segments: Line, Circular Arc, Clothoid
  • (or one step closer to IFC) The PredefinedType of IfcAlignmentHorizontalSegment must be LINE or CIRCULARARC or CLOTHOID
• (RI-11) The vertical layout must include only the following types of segments: Constant Gradient, Circular Arc
• (RI-13) The cant layout must include only the following types of segments: Constant Cant, Linear Transition

Not covered by the IDS file (must be checked otherwise)

• (RI-19) An IfcSignal shall have 'Body' geometry

Informal criteria

1. Check if the signals are facing opposite direction.
2. Check if the signals are placed on the correct side of the railway.
3. (RI-15) The start station of the alignment is -153.1 m
4. (RI-16) Check that the distance between one reference marker and the next one is 50 m, except for the first one

Signals are facing opposite direction

Overall view of Route Indicator_01 and Route Indicator_02

Signals are placed on the correct side of the railway

Route Indicator_01 top view

Route Indicator_02 top view

Expected geometry

Expected geometry

Control parameters

1. The total 2D length of the track alignment (horizontal projection) is 1029.3721 meters
2. The total 3D length of the track alignment is 1029.3861 meters
3. The ending point of the track alignment has coordinate (x, y, z) 453202.5241, 4539831.9287, 2.0000
4. The ending point of the track alignment has mileage (pk) 0+876.2721
5. The vertical height difference between starting and ending points of the track alignment 3D curve is -3.0000 meters

Link to requirements

BC-002 Requirements.xlsx