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Tunnel Designer Overview

The RS3 Tunnel Designer b_tunnel designer option under the Tunnels menu allows you to create 3D tunnels with various shapes, supports, loads, and staging excavation.

To create designs using Tunnel Designer:

  1. Select Tunnels > Tunnel Designer b_tunnel designer.
  2. Define the tunnel Profile. Create the tunnel cross-section drawing using available tools in the Toolbar:
    1. Tunnel: select and modify typical Tunnel Shapes b_tunnel shapes provided by RS3
    2. Draw: draw the cross-section with polyline, circle, data tables, and etc
    3. Edit: move or modify the cross-section
    4. I/O: import, export, or print a tunnel profile

A note will display by hovering the cursor over the viewport as shown below. It shows tips for constructing the tunnel cross-section (outer contour).

overview_tunnel profile tips

After the tunnel profile is created, you can use the drawing tools and options to Edit the profile, or customize the view (Annotate, I/O, Visibility, Select, Display).

  1. Define the tunnel Path. Construct the depth dimension to transform the 2D tunnel profile to 3D. Available approaches include extrude, coordinates, import files, and etc.
  2. Define the tunnel Excavation settings. The material and excavation sequence can be customized for each tunnel region.
  3. (Optional) Add Supports b_tunnel support and Add Loads b_tunnel load to the tunnel. Available support types include bolts, liners, and beams.

Tunnel Designer Interface

The Tunnel Designer dialog is divided to three sections as seen below (List, Settings, and View panel):

Example Tunnel Designer dlg
Example Tunnel Designer Dialog

List Panel

The list panel on the left of the dialog displays the defined tunnels with their framework: profile, path, excavation, supports, and loads. Use icons at the bottom to Add b_add, Delete b_delete, or Copy b_copy a tunnel design.

The “…” button beside the Tunnel Design item gives you more options. You can Copy b_copy, Paste b_paste, and Clear Design b_clear design. You can Add Support b_add support and Add Loads b_add load to a tunnel design after Profile, Path, and Excavation haven been defined. The Add Support and Add Loads options can also be found at the top middle section of the tunnel designer dialog.

tunnel design_more options

Advanced Options

When two pieces of geometries are too close together (e.g. edge to edge distance), the default algorithm may not be able to differentiate the two pieces. In such cases, the differences between the two pieces are not recognized, the two pieces will be detected as one, which might lead to misplace or missing supports/loads in the gap. In order to differentiate these small geometry features, you can lower the tolerance in Advanced Setting.

By default, the minimum tolerance is 0.12 m in length. You can define a lower tolerance to detect smaller features. The lower tolerance, the longer processing time due to longer calculation for higher accuracy. Based on the tunnel deign geometry, a suggested maximum and minimum tolerance value are provided in the dialog in blue text.

tunnel_advanced options_dlg

Settings Panel

The settings panel in the middle of the dialog allows you to modify the properties of the selected item from the left list. Use the icons on the top to Add Supports b_add support, Add Loads b_add load, or Pin the current 3D View b_pin view.


The Pin b_pin option allows you to display multiple designs in the 3D view port at the same time. When the Pin option is selected, the current tunnel design item will be pinned in the 3D view. It means when switching to other tunnel design items, you can still see this design in the 3D viewport. This option helps to compare between designs.

When the Pin option is selected, the Pin icon will be highlighted. Click again to unselect the option.

View Panel

The view panel on the right of the dialog displays the tunnel drawing in 2D b_2d view, 3D b_3d view or both b_both windowsby selection with viewport options. A toolbar is attached at the side. You can create the tunnel profile using Tunnel, Draw, Edit, and I/O options, and modify the view with other options. See the Tunnel Designer – Toolbar topic for more information.

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