Volume Calculation that adopted to find earthwork quantities for various civil engineering projects like: • • • • •
Road Work Irrigation Canal project Tank Survey Earth Moving And etc.
Earthworks - created through the moving and/or processing of massive quantities of soil or unformed rock.
Cutting - The process of excavating earth material from a work location to achieve the desired topography. Filling - the process of moving the excavated material or additional earth material to a work location to achieve the desired topography.
Typically, earthwork is done in the following projects: • • • •
Road works Railways Irrigation project such as canals and dams Other common earthwork applications are land grading to reconfigure the topography of a site, or to stabilize slopes
There are four popular methods of earthwork calculation: • • • •
Section method Average method Division by Square method Contour method
• Preparing for Earthwork Calculation • Finding the grid Levels • Interpolating the Available Elevations at the Grid Points ▫ Weighted average ▫ Triangulation Read full article here: http://www.surveydrawing.net/prepareearthwork-data.html
Four different Volume calculation methods should be in practice • • • •
Section Method Average method Division of Square method Contour Method
For calculating the volume, always two sets of surface data are required. • Initial Level: Original Ground Level (OGL) (survey data) • Final Level: Proposed/Designed Level (estimate) or Formation Level (survey data) Read full article here: http://www.surveydrawing.net/earthworkvolume-section.html
In trapezoidal method, each segment of the section is divided into various trapezoids and triangles. • Trapezoidal Area A = 1/2 X a X (b1+b2)
• Triangle area A = a * b/2
Read full article here: http://www.surveydrawing.net/earthwork-volumetrapezoidal.html
Find all the further lessons provided by Survey Drawing Here at Volume Calculation (Earthwork / Takeoff) Methods