The determination of earthwork quantities is based upon field cross- sections taken in a specified manner before and after excavation. Cross- sections are vertical profiles taken at right angles to the survey centerline. Every section is an area formed by the subgrade, the sideslopes, and the original ground surface.
How do you calculate earthwork?
The volume of earthwork between sections is obtained by taking the average of the end areas at each station in square feet multiplied by the distance between sections in feet and dividing by 27 to obtain the volume in cubic yards.
How do you calculate earthwork in excavation?
In this method Sections are drawn for Each Line of Value. Area of Cutting and Filling is found out for each Section with Trapezoidal Method or Nett Area Calculation Method. Then volume is determined by multiplying Average Area with Distance between Sections.
How do you calculate earthwork in a filling?
The volume between each pair of sections is estimated by multiplying the average cut or fill area of the two sections by the distance between them. Once these volumes have been calculated for each pair of sections the total cut and fill volumes are obtained by adding them all together.
How is BCY calculated?
To convert soil quantity from CCY to BCY, multiply the CCY value by the factor in the BCY column. To determine the volume of dirt you will have to haul to another location on the site or off the site, you would multiply the cubic yard by a Swell Factor, which in this case would be 1.25.
What is mid section formula?
In this formula, the mean depth is to be calculated. First by avergaing the depths of two consecutive sections. From the mean-depth the area of mid-section is to be worked out and volume of arthwork to be compted by multiplying the area of mid-secion by the distance between the two original sections.
What is the rate of earthwork excavation?
Example of Rate Analysis of Excavation in Earthwork
|1||Backhoe Excavator ( Per Day Excator 200 Cu.m.)||7000.00|
|B||Labour for Dressing|
|1||Mason For Leveling||700.00|
What is the difference between earthwork and excavation?
This earth work may be either earth excavation or earth filling or Some times both will get according to the desired shape and level. … Basically the volume of earthwork is computed from length, breadth, and depth of excavation or filling.
How do you calculate cost of excavation?
of days required for 10m3 excavation = 10/242.4242 = 0.04125 days. Likewise, based on the capacity of other equipment, labors etc., their cost is calculated. Contractors profit is also added to the total cost of labors and machineries. Then grand total gives the rate of excavation per 10m3 of soil excavation.
Is cut and fill expensive?
Builders say that putting a concrete slab on a cut and fill site is cheap, and it is until you factor in extra costs to solve the drainage problems that occur after the builder has long gone. Putting in drainage after completion of the home is very expensive.
When should I cut and fill?
Cut: Areas where the existing elevation exceeds the desired elevation have the “cut” material. Fill: Areas where the existing topography lies below the desired elevation line are the “fill” spaces.
How do you calculate backfill and excavation?
How to Calculate Backfill
- Calculate the volume of the space to be filled. …
- Calculate the cubic yardage of the same trench. …
- Next you might need to fill a round hole that is 10 feet in diameter and 5 feet deep. …
- Estimate the number of truckloads that will be required to fill these two holes with backfill.
How do you calculate fill area?
- Measure the length, width and depth of the area you want to fill with dirt. …
- Calculate the volume of dirt needed to fill the area you measured by multiplying length (120 inches) by width (60 inches) by depth (30 inches). …
- Convert cubic inches to cubic yards by dividing by 46,656 cubic inches.
How do you calculate filling quantity?
Area of the plot = Length x Width = 40 x 30 =1200 sft. Suppose we need to fill the plot by 3’5” = 3.41 feet. ∴ Depth of the plot = 3.41 feet. Volume of plot to be filled = 1200 x 3.41 = 4092 cft.
What is cut and fill method?
In excavation, cut and fill is the process of constructing a railway, road or canal whereby the amount of material from cuts roughly matches the amount of fill needed to make nearby embankments, so minimizing the amount of construction labor.