Tunnel Section Measurement Calculation

Function Description: Calculate road-related measurement data, attributes, and comparisons between two tunnel sections.

To avoid noise points on the generated ground surface, point cloud classification can be performed beforehand.

Prerequisite: Click the Tunnel Section button to enter the road section calcul

Only when the road section is activated will subsequent calculation buttons be available. During activation, switching projects via the directory and adding/deleting/modifying design data are not allowed.

Calculate Measurement Data

Function Description: Based on design data and point clouds, generate measurement data that meets parameter requirements and fits the ground point cloud.

1.Click the Calculate Measurement Data button to open the settings dialog.

OpenPointCloud

Calculate Measurement Data

Parameter Description

  • Measurement Group: Select the group of measurement data to be calculated.
  • Maximum Edge Length: Edges larger than this threshold will be split into shorter edges.
  • Section Thickness: The width of point cloud data used to generate the measurement longitudinal section.
  • General
    • Source Category: The point cloud category used for section generation. Choosing the correct source category is critical; otherwise, the generated result may be incorrect.

Result Example:

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Result Example

The red line represents the generated measurement section. The result is calculated automatically; if it does not meet expectations, manual editing can be performed in the 2D cross-section editor.

Note: Tunnel sections currently only support geometric calculation and section export. For other details, refer to Road Section.

Two Section Comparison

Function Description: Compare different measurement data groups and calculate filling and excavation volumes. Filling and excavation are displayed in different colors (colors can be customized).

Steps

1.Click the Two Section Comparison button to open the dialog.

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Section Comparison

2.After calculation, the generated tunnel reference section and the tunnel design section will be compared, and the filling/excavation area and total filling/excavation volume will be calculated. Filling and excavation areas are displayed in different colors (customizable).

The total filling/excavation volume is calculated as: half the distance between the previous and next mileage stakes multiplied by the filling/excavation area of the current stake. The start and end mileage stakes only calculate half of the respective distances.
Example: If the mileage stake is K0+80 with filling/excavation area S, the previous stake is K0+72, and the next stake is K0+90, then the volume V = ((80-72)/2 + (90-80)/2) * S. Summing the volumes of all mileage stakes yields the total filling/excavation volume.

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Section Comparison Result

3.Click the Export Report button.

Export Section

Function Description: Export 2D or 3D section lines in multiple formats. Sections can be saved as one or multiple files. Supported formats include ".csv", ".hdm", ".shp", and ".dxf".

1.Click the Export Section button to open the parameter dialog.

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Export Section

Parameter Description

  • csv: A universal format used internally by the software. Design section imports are read in as .csv section data.

  • dxf, .shp: Two vector formats that can be imported into third-party software such as AutoCAD to view section results and related data.
    Example: Generating a .dxf file, parameter settings are shown below. After setting the output path, click OK to export.

    OpenPointCloud

    Export Section

Export PDF

Function Description: Export cross-section images to PDF.
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Export PDF

End

Function Description: End the section analysis and automatically save the analysis project management file (.section file).

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