CDOT Calculate Volume

7/29/2019 CDOT Calculate Volume

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CDOT Calculate Volume

Version 3.02.02 Page1 of 7 Updated May, 2008

This document guides you through three methods to calculate volume: Grid, Triangle, and End Area.

Calculating Grid Volumes

Calculate the volume between the existing surface and the proposed surface using the gridvolume method.

1. SelectTools > Customize >[Toolbars]and check onVolume. Closeto dismiss theCustomize dialog.

2. Select theGrid Volume command.

Set theOriginal Surface to: Existing01.

Set theDesignSurface to: Finished Grade. Enter theGridInterval: 50thenTab to accept. Leave theCutFactorandFillFactorset to1.0.

3. Apply.

4. Record the results in the table provided.

5. Enter aGrid Interval of10thenTab to accept.


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CDOT Calculate Volume.pdf

6. Apply.


8. Enter aGrid Interval of5thenTab to accept.

9. Apply.

10.Record the results in the table provided.

11.Close to dismiss theGrid Volume command.

Calculating Triangle Volumes

Calculate the volume between the existing surface and the proposed surface usingthe triangle volume method.

1. From theVolumestoolbar select theTriangle Volume.

Set theModetoEntire Surface. Set theOriginalSurface to: Existing01. Set theDesignSurface to: Finished Grade. Leave theCutFactorandFillFactorset to1.0.

2. Apply.

This method will take longer to process than the grid method.


4. Close to dismiss theTriangle Volume command.



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Calculating End-Area Volumes

Calculate the volume between the existing surface and the proposed surface usingthe end-area volume method (CDOT standard method). With the first run, you will

not take the subgrade into account.

End Area without Subgrade

In order to use this command, you must be in the design file where your final crosssections were cut.

1. SelectFile > Open to open the cross section design file.

2. From theVolumestoolbar, select theEnd-Area Volume command.



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3. Define the cross sections and surfaces to be used for the volume calculations.

Select thefinal sectionset from theCross Section Set list.

This should be a full set of cross sections generated along the alignment. Abox is drawn around the set to show which one youve picked.

Set theOriginalSurface toExisting01. Set theDesignSurface toFinished Grade. SetUnitstoCubic Yards.

Leave theCutFactorandFillVolumeFactorsset to1.0.4. Apply.

Results appear in a separate dialog box.

5. Record the results in the table provided, thenClose to dismiss theResultsdialog.



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End Area with Subgrade Considered

Calculate the volume between the existing surface and the proposed surfaceincluding the subgrade surface using the end-area volume method andgenerate an ASCII report and binary file to be formatted into an ASCII reportin a later exercise. You will also calculate the additional material volumes.

6. In theEnd Area Volume dialog.

Toggle onSubgradeSurface and set toSubgrade. Under Outputplace a check in theASCIIcheckbox. In the field beneath theASCII checkbox,Navigateand enter a

file name ofendvol.txt.

Place a check in theBinary checkbox.

In the field beneath theBinary checkbox,Navigateand enter afile name ofendvol.bin.

7. To calculate additional sublayer volumes, select theLayer Volumestab.



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Set theTop layer toFinished Grade.

Set theBottomlayer toBase Course Top.

Set theClosuretoVertical Drop.

Add.

Set theToplayer toBase Course Top.

Set theBottomlayer toSubgrade.

Set theClosuretoVertical Drop.

Add.

8. Review the other tabs and make any changes you would like.

9. Applyon theEnd-Area Volume dialog box

10.Record the results in the table provided



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11. Close to dismiss theResultsdialog box

12. Close to dismiss theEnd-Area Volume command

Note the difference in the volumes as the subgrade is removed from fill volumes and

added to the cut volumes.

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CDOT Calculate Volume