Area and volume report - TNC3

5.1 Area and Volume Report

This kind of reports shows the same initial screen for requesting the entry data.

Initial station: Station where volume calculation starts.

Final station: Station where calculation ends.

Minimum height: Height with respect to the vertical alignment for cutting the cross-sections and theoretical cross-section, by a horizontal line.

Once the data requested has been entered, the following list is shown after clicking on OK.

Area Report

The area report shows the following information:

Station: Shows the stations where points have been observed.

Length: Difference between previous and next station.

Perimeter.: Cross-section perimeter.

Area.: Area formed by the cross-section of the previous and next station on the list. This is calculated by the Mean Areas method:

A = ( PerimeterFST + PerimeterIST ) * ( ( FST -- IST ) / 2 )

where

FST = Final Station of the interval.

IST = Initial Station of the interval.

PerimeterIST = Perimeter of the initial cross-section of the interval.

PerimeterFST = Perimeter of the final cross-section of the interval.

Volume Report

The volume report shows the following information:

Station: Shows the station where points have been taken.

Length: Difference between previous and next station.

Overbreak area: Excess excavation area at station indicated.

Underbreak area: Area to be excavated at station indicated.

Exc. area: Excavated area at station indicated.

Overbreak vol: Existing excess excavation volume between the previous and next station on the list. It is calculated by the Average Areas Method:

V = ( ( FSt -- ISt ) / 2 ) * ( SurFSt + SurISt )

Where

FSt = Final station of interval.

ISt = Initial station of interval.

SurFSt = Excess excavation surface or surface to be excavated calculated at the final station of interval.

SurISt = Excess excavation surface or surface to be excavated calculated at the initial station of interval.

Underbreak vol. Existing volume to be excavated between the previous and next station on the list. Calculated using the same method as for overbreak volume.

Exc.vol.: Existing excavated volume between the previous and next station on the list. Calculated using the same method as for overbreak volume.

Total Overbreak Volume: Sum of over excavation volumes between the initial and final stations on the list.

Total Underbreak Volume: Sum of volumes to be excavated between the initial and final stations on the list.

Total Excavation Volume: Sum of excavated volumes on the list