Characteristics of Mass Curve:
1- Rising sections of the mass curve indicates areas where excavating exceeds fill, whereas falling sections indicate where fill exceeds excavation. 2- Steep slopes reflect heavy cuts & Fills, while flat slopes indicate areas fro small amount of earthwork.
What does a mass haul diagram represent?
A mass haul diagram provides viewers with a graphical representation of the material moved. In particular, the diagram will showcase the amount of material that’s been transported along the centerline. It also displays the distance that the materials travel while being transported.
How a mass haul diagram is used to calculate the earthwork quantities?
The mass haul diagram is a curve plotted on a distance base with the ordinate at any point on the curve representing the algebraic sum of the volume of earthwork up that point. A haul refers to the transportation of your project’s excavated materials.
How is stripping cut calculated?
The area of each strip is calculated by multiplying the line’s length by the distance interval between the lines.
How do you calculate overhaul volume?
The Engineer will compute the overhaul quantity by multiplying the overhaul distance in Stations by the number of units of excavation in cubic yards hauled. The Engineer may use an analytical method in lieu of the mass diagram method to determine the overhaul.
What is haul and over haul?
The area enclosed by the two mass haul lines on the left if above the balance line, or on the right if below the balance line, represents the free haul volume. The remaining intersecting area represents the overhaul.
How do you use a mass haul diagram?
To Create Mass Haul Diagrams
Select a material to display as mass haul line (Total Volume, Total Cut Volume, Total Fill Volume, Total Unusable Volume, and any other material associated with the material list). Specify a mass haul line style. To edit the mass haul line style, next to Mass Haul Line Style, click .
What is overhaul in construction?
To overhaul is to completely renovate, making major changes in order to repair. A few shutters and a new coat of paint won’t come close to fixing that old, boarded-up house — it needs a complete overhaul.
What is a mass diagram in construction?
The mass diagram is a plot of horizontal distance along a project against the algebraic sum of the accumulated earthwork along the project. Excess cut or excavation is assigned a positive sign; excess fill or embankment is assigned a negative sign.
How do you calculate mass excavation quantity?
So, the formula is: Ab = Wb * Lb, where Wb and Lb are the width and length of the bottom of the excavation. At = Wt * Lt, where Wt and Lt are the width and length of the top of the excavation. In our example, Wb = Lb = 5 and Wt = Lt = 15, so Ab = 5 * 5 = 25 and At = 15 * 15 = 225, and D = 5.
How do you calculate backfill?
Backfill for Figure 3.1:
Backfill volume = excavation volume – footing volume – wall volume. (Note that only the portion of the wall that is in the trench is deducted, so the height of wall in the trench is the average trench depth minus 2′-0” for the footing: 6′-0” – 2′-0” is 4′-0”)Backfill volume = 207.4 cubic yards.
What is haul distance?
The distance measured along the center line or most direct practical route between the center of the mass of excavation and the center of mass of the fill as finally placed. It is the distance material is moved.
How do you calculate haul?
Average haul is the area of the mass diagram representing the number of cubic yard stations of haul between balance points divided by the ordinate of the mass which the yardage is hauled.
