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Tunnel Design

MOUS_ICO Menu: Tunnel > Tunnel Design…
MOUS_ICO Toolbar: Tunnel: Tunnel Design…


Define Tunnel Profile Geometry

This is the !!dialog!! where you define the tunnel !!geometry!!.

On the left hand side in the dialog you find the “tunnel structure element tree”. You should use this tree-control to define your tunnel project.

On the right hand side in this dialog there is a cross-section viewer for the tunnel. You should use this viewer to inspect the results of what you define in the tree-control.

The dialog top-menu

At the top of this dialog you find a small menu:

The following menu items are included in the Project menu:

  • Open Project: Opens the Tunnel Project Setting dialog
  • Save Project: Saves the geometry shown in the tree-control in this dialog to the tunnel geometry file
  • Close: Closes this dialog

The following menu items are included in the Profiles menu:

When selecting Help you get this help-text.

The tunnel structure element tree

This tree-control is the place where you design your tunnel.

A tunnel project can consist of only one tunnel at a time. Each tunnel is designed along one reference line. The reference line is defined in the road project (typically centre line of the road).

The reference line for the tunnel is shown above the tunnel structure element tree.

The tunnel is divided into several structure elements. The following elements are supported:

To define a new tunnel element, you have to go to the folder symbol for the actual tunnel element and click on the New button or click on the right mouse button and choose New. When you do so, a dialog opens in which you can define the new tunnel element.

The dialogs for the different tunnel elements are floating dialogs, so you don´t have to close them when you move on to the next type of tunnel element to define.

To edit an existing tunnel element, you simply choose the element in question and click on the Edit button or click on the right mouse button and choose Edit.

The cross section viewer

You should use this cross section viewer to actively check the cross-sections of the tunnel while working with the tunnel geometry.

You can step along the road by using the spin buttons for the Chainage no below the cross-section viewer. Alternatively you can write a chainage number in the text field and tab out of the text field. The Interval value decides the step size for the spin buttons.

The cross-section viewer tool-buttons

The tool-buttons placed above the cross-section view have the following functionality:

Measure a distance in the cross section viewer. Click in the cross section viewer to see a line stretching from the point you clicked to the mouse location. The length of the line is dynamically updated on the status bar.

Opens the Cross Section Area Calculation dialog

Opens the attribute dialog where you can turn on and off information on the cross-section image.

Zoom button: Click the left mouse button in the cross-section view, hold it down and drag a square across the area you want to zoom in.

Resets the zooming and panning in the cross-section view

Pans the cross-section view. Click the left mouse button in the cross-section view, hold it down and drag the image in the direction you want to move it.

Toggles on and off a 1×1 meter mesh in the cross-section view.

The status bar

The following values are shown in the status bar at the bottom of the dialog (from left to right). Cross-section calculation status

  • Rotation in % of the tunnel cross-section
  • Total area of the perimeter in m2. The area is calculated based on the theoretical base.
  • X-and Y- (horizontal and vertical)- coordinate in meter at the mouse cursor. Origo is the road reference line at the road surface.

All values refer to the cross-section shown in the cross-section viewer.

Dependencies between the tunnel structure elements

The tunnel structure elements are dependent of each other and of the road profile. These are the dependencies:

  • The inner profile is dependent of the road profile
  • The perimeter is dependent of the road profile and the inner profile
  • The left and right pavements are dependent of the road profile and the inner profile
  • The free space is dependent of the road profile
  • The designed base is dependent on the road profile
  • Bolts are dependent on the inner profile and/or the perimeter.

The specification of the following tunnel structure elements canít be overlapping (defined at the same chainage number):

  • Inner profile
  • Perimeter
  • Left and right pavement independently
  • Designed base

Several free space elements and bolts can be defined at the same chainage number (no limitation).

There can be gaps in the chainage intervals between adjacent tunnel structure elements of the same type, but generally the chainage interval for the previous tunnel element should stop at the start chainage number for the following tunnel element.

Gaps in the chainage intervals for the inner profile leads to breaks in the tunnel definition.

Requirements for the road project

The tunnel is connected to the road. The road is the master and the tunnel is the slave. The road project must fulfill certain requirements so that it will be possible to connect the tunnel to the road. These are the requirements:

These are the requirements:

  • There must exist continuous surface edge lines that represent the intersection between the inner profile of the tunnel and the road surface. These edge lines will be used as connection points for the inner profile.
  • The pavement should not be a part of the road surface description
  • There must be a continuous surface edge line representing the curbstone line (connection point).
  • Below the curbstone line there should be defined a binding course to place the curbstone on. This course should not end below this surface edge, but be modeled a little further out against the tunnel wall.

Note: If the curbstone line is not parallel with the reference line of the road, this line must be defined further out from the tunnel wall in the cross section, so that the pavement will not be too narrow:

  • There must exist continuous surface edge lines that can represent the free vehicle box connection points to the road surface
  • The road bed must be modeled to represent the theoretical rock base
  • Closed drainages to be included in the contractors bore plan, must be defined in the road model. The closed drainages must contain the same number of cross section geometry points all the way along the total tunnel distance. Dummy points must be included for parts of the tunnel if necessary.
  • Sometimes the road bed is automatically defined up against the modeled open drainage in the road
Last modified: 2012/08/13 08:18 by admin