how to calculate cubic yards of excavation

Excavation is necessary for various projects, including constructing a building, putting roads, or installing underground utilities. Determining the amount of dirt or soil to be moved is critical to ensure the project's success. One of the best ways to calculate the amount of excavation needed is by using cubic yards. This article will guide you on how to calculate cubic yards of excavation.

Step 1: Measure the Area of Excavation

To calculate cubic yards, you first need to determine the area of the excavation. Measure the length, width, and depth of the area using a measuring tape or a measuring wheel. Multiply the length, width, and the depth to find the volume in cubic feet. If you have multiple areas to measure, use the same calculation method to determine their volume.

Step 2: Convert Cubic Feet to Cubic Yards

After obtaining the volume in cubic feet, you need to convert it to cubic yards. One cubic yard equals 27 cubic feet. Divide the total volume in cubic feet by 27 to get the answer in cubic yards. It is crucial to use a calculator or computer to ensure an accurate result.

Step 3: Adjust for Shrinkage or Swellage

Most soil excavated will have natural compaction, which will affect its volume. Therefore, it is necessary to adjust the excavation volume for shrinkage or swellage. Shrinkage occurs when the soil is dug up, and its volume decreases due to natural compaction. Swellage occurs when the soil is excavated, and its volume increases due to natural expansion. To make this adjustment, divide the actual volume of the soil by the shrinkage factor or the swellage factor. The shrinkage factor depends on the type of soil and its moisture content. For example, a typical shrinkage factor for excavated sandy soil is 1.25.

Step 4: Add the Volume of Additional Materials

When excavating, additional materials such as rocks, debris, or trees may need to be removed from the site. To calculate the cubic yards of excavation for these materials, determine their volume, convert them to cubic yards, and add them to the excavation volume calculated in step 2.

Conclusion

In conclusion, calculating the cubic yards of excavation is a vital step in any construction or excavation project. Following the steps above will help you determine the amount of excavation you need to complete your project successfully. Remember to measure the area first, convert cubic feet to cubic yards, adjust for shrinkage or swellage, and add the volume of any additional materials. With these considerations, you can accurately calculate the cubic yards of excavation required for your project.