How do you calculate excavation in earthwork?
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 is trench excavation measured?
Determine the volume of the trench by using the formula: Volume = Width x Length x Depth. As an example, a trench 12 feet long with an average width of 2.3 feet and an average depth of 5 feet has a volume of (12 x 2.3 x 5) cubic feet.
What is the unit of measurement for dirt excavation?
ProContractor considers natural dirt in terms of Bank Cubic Yards (BCY) or Bank Cubic Meters (BM3). One cubic yard that is in the ground of a job site (BCY) will be more than one cubic yard when you excavate it out of the ground (LCY).
What is the quantity of excavation?
Volume of Excavation =Length×Width×Depth. Where, ft3 is a total volume (cubic feet) and m3 is a cubic meter. length, breadth and depth in feet/inch.
What is earthwork in excavation?
Earthwork in excavation in foundation trenches or drains not exceeding 1.5m in width and 10sq. … Care shall be taken to cut the sides and bottom exactly to the required shape, slope and gradient, while carrying out excavation for drains work. The surface shall be dressed properly.
How do you calculate slope of excavation?
Slope Angle Calculations
This simple equation will tell you the proper opening width: (depth x 2) x type slope ratio + width of original excavation = top width. As an example, let’s calculate the slope angle of a simple trench that is 6 feet deep by 2 feet wide, factoring in the type of soil. Type A: (6 feet x 2) x .
How much should I charge for excavation?
A typical residential excavation job runs between $1,438 and $5,295 with an average of $3,274. Though most companies charge anywhere from $40 to $150 an hour, residential jobs receive project bids. Project bids reflect cubic yards of dirt moved, anywhere from $50 to $200 per cubic yard.
How do you find the slope of an excavation?
For example, if the trench is 6 ft deep and 20 ft wide across the end of the trench and the bottom of the trench is 2 ft wide, the slope can be calculated as follows: Horizontal distance = 20 ft – 2 ft ÷ 2 = 9 and the Vertical depth = 6 ft; Slope = 9 ÷ 6 = 1.5 to 1, which is the slope needed for type C soil.
What is BCY unit?
A bank cubic yard, or BCY, is the calculation or measurement of 1 cubic yard of earth or rock in its natural state before it is removed from the ground. The volume measurement is commonly used in the mining and construction fields.
How is Earthwork calculated?
Every section is an area formed by the subgrade, the sideslopes, and the original ground surface. Volumes are computed from cross-section measurements by the average end area method. These formulas are used to compute earthwork quantities because the Specifications require this calculation.