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Tunnel Software - CS Drawings & Excavation Area Calculation

Area Calculation for Excavation, Under Cut, Over Profile


  Area Calculation for Excavation, Under Cut, Over Profile

Tunnel Module of ESurvey Civil Tools Helps you prepare the Cross Section drawings of Tunnel Profile.

Terminology in Tunnels

  1. Crown: The uppermost part of the tunnel.
  2. Invert : The bottom Floor of the tunnel.
  3. Heading : the excavated face of the tunnel.
  4. Wall: the side of the tunnel
  5. Drift : Horizontal Excavation
  6. Portal : the tunnel entrance
  7. Spring line: The point where the curved portion of a tunnel roof meets the top of the wall.
  8. MEL Area- Mean excavated levels area ( It is called so, because after the excavation of Heading, Even the excavation of benching will be done, so at that stage it is referred as MEL area.)
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Figure 1 : The figure shows the over profile or over cut area. This can be understood that cutting of the tunnel for the designed profile is not achieved exactly , which is also not practically possible to cut as per the designed profile. However, these areas are to be estimated for several requirements.

Figure 2 : The figure shows the Undercut area. This can be understood that cutting of the tunnel for the designed profile is not achieved exactly. Here we can observe that the cutting is not achieved to the designed profile.

Tunnel Module of ESurvey Civil Tools helps you compute Excavation, Under Cut and Over Profile Areas Easily.


  1. Prepare Presentable Cross Section Drawings
  2. Save Considerable time in Preparing Area Computation for Under Cut, Over Profile



  1. Introduction
  2. Preparing drawing to create polygon of Actual, Profile, Lining and move to required layers
  3. Export polygons to Civil Tools Interface from CAD
  4. Import data to Civil Tools Interface
  5. Export Report and Section Drawing

a. Introduction to Tunnel Module of Civil Tools

Tunnel Module of ESurvey Civil Tools gives solution for

  • Preparing Section Drawing in given Scale.
  • Generate earthwork report for Undercut, Overcut and billing Quantity.

In this help You can understand Working with Tunnel Module with an Example.

Using this module you can compute earthwork quantity of Excavation, under cut and Over Profile area with following Steps

Working on ESurvey Civil Tools Interface

Import data Exported from drawing file (Polygons in Layer1 to Layer6). Once all this information is imported into Tunnel module, then Tunnel module can give Area report indicating how much Overcut, undercut, and Actual cut area.

b. Preparing drawing to create Tunnel

First, you need to create polygons of each chainage actual cut area, Profile and Lining polygon in CAD package in 1:1 scale. Draw Closed Polygons representing Profile and Actual Work Done. In Tunnel Module up to 5 Layers are supported that is Layer1 to Layer5. Move these Polygons to Layer between Layer 1 to Layer 5.

Before Exporting the polygon information to Interface, to Help the application Identify each vertex, you have to insert Tunnel Block. Tunnel Block is a attribute Block which works as base point for calculating vertexes of polygongs. Insert Tunnel Block using ITS command. Attach Polygons in Layer 1 to Layer 5 using AttLi command.

Using a set of lisp command you have to prepare required data.

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Insert Tunnel Section object to Attaching line to Section Object



Edit attribute block



Attach polygon to selected section object



To locate a point based on given offset distence and elevation, use this option. You have to select a section object provide Offset and elevation input and command will create a point considering your input values.



You can identify Distance and elevation of selected point based on selected section object



Mark Elevation and Offset distance along a Section line. Select a line representing series values and quick section will mark elevation and chainages along the selected line.



Export Polygons attached to section object with respective line

c. Export boundaries to Civil Tools Interface from CAD

Once drawing preparation is done, all information can be exported using EXTS (Export Tunnel Section Levels) command to ESurvey Civil Tools Interface. Select all the Tunnel Objects to export the vertex information of attached Polygons.

d. Import data to Civil Tools Interface

Open ESurvey Civil Toolsà Go to New File submenu from File menu

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Select Tunnel option and give project name click on the Save button.

Tunnel Software

Select Tunnel submenu from Main menu

Tunnel Software

Import Data in Tunnel window click on Import button then select CAD or Excel option in ‘Import Sections’ window click on Import button.

Tunnel Software

Click on Settings button to set area calculation layers, drawing scale in Basic option in Project Settings tree view

Tunnel Software

Then after, click on Section Display (CS) option from Settings Tree view

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Once setting is completed you can view section as shown

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Export Report and Drawing

To export Section drawing click on Print Section Icon

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In Preview window do settings for section per Row and Column.

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Click on Drawing to export all sections to CAD package

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To get area and volume report click on Export button in Tunnel window. Select Layer which you want to take report then, click on Export button.

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Sample area and volume report

Tunnel Software