How long does it take to dig an excavation pit?
You've already rented an excavator and want to start digging right away? No problem! For those eager to get started immediately, we've condensed the formula for calculating the required time:
Duration (in hours) = Volume of hole (in cubic meters) ÷ Hourly output of excavator (in cubic meters per hour)
This formula may seem complicated at first glance, so we'll explain the calculation step by step:
Step 1: How to calculate the hourly output of an excavator
To determine the hourly output of an excavator, there are various tables that provide performance based on soil type and environmental conditions. A simple yet reliable approach is using the "Landshut Formula". This allows for a rough estimate of an excavator's hourly output:
Hourly output of excavator (in cubic meters per hour) = Engine power of excavator (in kW) x 0.75
If the engine power in kW is not known, the calculation can also be done using engine power in PS:
Hourly output of excavator (in cubic meters per hour) = Engine power of excavator (in PS) x 0.55
The factors 0.75 and 0.55 are standard factors. They're based on average values and provide a solid foundation for your calculations.
Step 2: Calculate the volume of your excavation
Hourly output indicates how much material can be dug out within an hour. To know how many cubic meters of earth you need to excavate, calculate the volume of the hole. The volume depends on the shape of the hole:
Rectangular base (e.g., for a pool):
Volume (in cubic meters) = Length x Width x Depth (in meters)
Step 2: Calculate the volume of your excavation
Hemispherical base (e.g., for a pond):
Volume (in cubic meters) = 2 x Radius³ (in meters)
Keep in mind that these calculations serve as rough guidelines, as actual job site conditions can vary.
Step 3: Calculate the duration of excavation
Once you know the volume of the hole to be dug and the hourly output of the excavator, you can calculate the required time:
Duration (in hours) = Volume of hole (in cubic meters) ÷ Hourly output of excavator (in cubic meters per hour)
This formula gives you a good estimate of how long the excavation will take. However, keep in mind that the actual duration depends on the operator's experience and specific site conditions.
Example: How long does it take to dig a pool or pond with an excavator?
Let's say you want to dig out a rectangular pool that is 8.50 meters long, 2.50 meters wide, and 1.50 meters deep. You rent a mini excavator with an engine power of 11.8 kW.
Step 1: Calculate the hourly output of the excavator
Hourly output (in cubic meters per hour) = 11.8 kW x 0.75 = 8.85 cubic meters per hour
Step 2: Calculate the pool volume
Volume (in cubic meters) = 8.50 x 2.50 x 1.50 = 31.9 cubic meters
Step 3: Calculate the duration
Duration (in hours) = 31.9 cubic meters ÷ 8.85 cubic meters per hour = approx. 3.6 hours
So you'll need roughly three-and-a-half to four hours to dig out the pool. Keep in mind that inexperienced operators may need more time, and you should also plan for additional time for idle operation or transporting the excavator.
How do I operate a mini excavator?
To help you get started with a mini excavator, we've created a video that explains the basic functions. After watching, you can get straight to work and operate your excavator efficiently.
Benefits of equipment rental with klarx
If you want to rent an excavator or mini excavator, klarx offers numerous advantages:
- Maintained machines
All rented machines are regularly serviced and in perfect condition. - Nationwide delivery
klarx delivers machines directly to your job site, saving you time and money. - Easy booking
Booking is simple and can be done quickly online. - Wide selection
klarx offers a broad range of construction machines for different projects. - Transparent pricing
There are no hidden costs, which makes planning easier.
