Creating a Platform Earthwork

You can create the geometrical design of a platform on terrain by modifying the initial terrain. You can create a platform cross section that is an input necessary for the platform creation.

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Before you begin: The app optional content is not automatically installed along with the code. Contact your administrator if you must install the files you need. For more information, see Install Optional Content. You can also see Installation and Setup:Install: 3DEXPERIENCE Platform: Installing 3DEXPERIENCE Platform Services for the First Time: Installing Services One-by-One: Native Apps: Installing Native Apps: Installing a Native App.

As you create only one profile all around the curve platform, you need a surface or a closed curve (both can be polyhedral) and associated terrain (it must be a polyhedral mesh) as input. For more information, see Working with Polyhedral Entities in Civil Engineering 3D Design. You can use the Platform Earthwork functionality in the Civil Engineering, Road, or Railway context.

  1. From the Civil Engineering section of the action bar, click Platform Earthwork .
  2. Select a surface or a closed curve (highlighted in blue in the 3D area).
  3. Select a polyhedral terrain.
  4. To select a platform cross section containing predefined excavation and filling profiles, do one of the following:
    1. Select a platform cross section in the Cross Section node in the tree when it is available in the same assembly. Or click Search an object type .

      Only object types corresponding to the chosen discipline (which can be a platform, a road, or a railway) and undefined object types are visible. The content provided in the SubgradeTypicalCrossSections.3dxml stored in the ...\startup\Civil\Alignment directory has been updated in R2022x GA to take the discipline into account.

    2. Select a platform cross section in the list.
    3. Optional: Sketch a new profile.
    4. To remove the cross section, click .

    A platform cross section is created. The filling profile is blue and the excavation is orange:

    A light blue profile is also pasted at the beginning of the curve indicating cross section scanning.

  5. Optional: To display a preview of the selected object type in a side panel, click Template Helper .
    A template viewer opens next to the Platform Earthwork dialog box and displays the shape of the object type and axis systems.

    In the Helper, you can move and zoom in the object type. Click again the same input and the object type moves back to its initial position.

    To close the Helper, click or Close or

  6. Optional: To modify the terrain and compute excavation or filling works, select the following options:
    If the terrain has not been selected, or if it is selected but no stretch set has been selected, only a road, railway, or platform stretch is created, without any modification of the terrain.

    • If the terrain has not been selected, or if the terrain is selected but no stretch set has been selected, only a road, railway, or platform stretch is created, without any modification of the terrain.
    • To keep or remove excavation or filling works, which are not connected to road, railway or platform surface, select the Keep non-connected excavation and filling works option. When a zone seems to be meaningless for the surface (Zone2 in the example below), you can disconnect it from the road, railway, or platform:

      With this option, Zone2 is excluded from the filling works result.

  7. To visualize the excavation and filling profiles on the terrain in the 3D area, click Preview.


  8. Click OK.

    The filling profile is blue and the excavation is orange.



    A new node called Earthwork containing Platform Stretch Set is created in the tree. Platform Stretch Set includes the following items:

    • Modified terrain
    • Excavation works
    • Filling works
    • Platform

    If you hide the excavation and filling works, and the platform, you can visualize the new shape of the terrain:

  9. Optional: To modify the terrain and compute excavation or filling works, select the following options if:

    1. When the terrain has not been selected, or when it is selected but no stretch set has been selected, only a road, railway, or platform stretch is created, without any modification of the terrain.
    2. When the terrain and stretch set have been selected:
      1. And when the stretch set does not exist, then a new stretch set is created.
      2. Otherwise, the road, railway, or platform stretch is moved to the existing stretch set.
      3. If the Create modified terrain option is not selected, the terrain is modified. If not, it is deactivated. By default, the with excavations and fillings option is selected and you can see these modifications encrusted on the terrain:

      4. To modify the terrain and take only earthwork excavation stretches into account in terrain modification, click with excavations: filling stretches are ignored. To modify the terrain and take only earthwork filling stretches into account in terrain modification, click with fillings: excavation stretches are ignored and consequently excavation works are not computed.
      5. To remove the excavations and fillings from the modified terrain, click the without excavations and fillings option:

      6. If you click with only excavations and fillings, the modified terrain contains only excavations and fillings:

      7. If the Create excavation and filling works option is selected, they are created (filling profile in blue and excavation in orange), or modified if they have already been created. If not, they are deactivated.
    3. If the Create modified terrain option is selected, the boundary of excavations and fillings is generated under the Stretch Set in the tree. If you select the boundary in the tree, it is highlighted in the 3D area:

  10. Optional: To extrapolate the last section of the cross section profile to the terrain, select the Extrapolate cross section to terrain option. By default, this option is selected.
    • The cross section profile is systematically extrapolated to the terrain, as shown in the right figure below.
    • In some cases, you want to keep the profile as it is (as shown in the left figure below), without extrapolation.
    • This option allows you to have a choice about the profile extrapolation.

      : Right side profile without extrapolation.

      : Right side profile with extrapolation.

  11. Optional: From the Civil Engineering section of the action bar, click BIM Attributes and select the Excavation or Filling works in the tree to read the excavation and filling volumes (in the Bank volume box).
  12. To edit the cross section, select Platform Stretch Set in the tree and click under the Platform Cross Section area in the Platform Earthwork dialog box.

    For more information, see Creating a Platform Cross Section and Associated Object Types.

    The Platform Cross Section Sketcher opens and lets you edit the excavation and filling profiles. Two green lines are displayed on the modified terrain corresponding to the current profile of the cross section.
  13. To create a new cross section, you need to generate only one profile on the right side of the platform.

    For more information, see Creating a Platform Cross Section and Associated Object Types.