How GPS Tracking Helps Landfill Construction Save Time and Money

Surveyors no longer need to jam stakes into the dirt to grade landfills these days. In fact, engineers now have the option to use their GPS devices and machines in finishing landfill construction projects—and doing so at a faster pace.

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Landfill Construction GPS Tracking

Carlson Software vice president of business development and marketing, Randy Noland, shared, “Landfill construction has very tight tolerances. It has the same benefit as any GPS machine control. You want to move exactly per design, as productively and accurately as possible.”

He added, “If you overgrade, it costs money; if you undergrade, it costs money.. . . In building landfills, you’ve got a very regulated design for the slopes of the landfill. You’ve also got expensive materials because you’re lining the landfill with clay and with other materials, and those are even more expensive.”

Rebuilding a slope due to poor grading could mean millions of dollars lost in material and manpower. Noland said that if a slope is built too steep, then there would be too much airspace. Too flat and it might not have enough.

For first-time users of GPS for landfill construction, setting them up onsite may be daunting. However, for accurate slope grading, a user must be able to set up the GPS tracker technology properly. Any deviation from the specifications could require expensive rebuilds.

Despite the accuracy of the GPS for landfill construction, errors still occur due to poor usage. However, this can be corrected. Here is the rundown on how to set up the GPS system:

Tips for Setting Up GPS for Landfill Construction

  • Set up control points throughout the site to calibrate the area: the minimum recommendation is 4, but others go with 6 or 8 to be safe.
  • The base station of GPS for landfill construction should be put somewhere stable, around 6 to 8 feet in the air. This enables the system to reach a certain level of accuracy. Calibrating it to the site is also important, so find a permanent location to avoid having to move the base station later on.
  • Set up the radio or cellular network, including those that transmit data to onsite machines.
  • Build the landfill design into a 3-D design file so that the machines onsite could use them as a guide for construction.
  • The GPS for landfill construction can be installed on the bulldozer, compactor, or ATV to be used during construction, then calibrate them with the base station. However, some people don’t recommend putting the sensor directly on the blade for day-to-day operations.
  • Transfer the design files from the system to the machine.
  • As a measure of practicality, anyone operating the machine should have had training on how to use the system properly.

GPS Construction

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A wireless GPS setup at one location joins other GPS devices in others. The owner of the systems can spend the day sitting at a home office while still getting real-time data from each of his systems. This is why the GPS for landfill construction helps reduce needless work. Operators can check landfill building to ensure that the contractors are staying true to the design, but in the actual design phase, the user can load it into the system that gives the specifications for a slope or another landfill component.

Bruce Flora, owner of Flora Surveying Associates, said, “The things that used to take two days now take two hours. Using that machine as a tool to help the operator grade the plan is probably the biggest use of it GPS, with compaction being second. If I am building a wetland, I can put a model into the machine, and the machine can guide and cut through the wetland for me. So you can do it quicker, faster.”

Flora also said that the manner in which items inside the landfill are built, such as the haul road, storage pad, stormwater drains, leachate and stormwater retention ponds, and constructed wetlands, remain the same. However, the difference is that GPS provides a more accurate way of grading and cutting time, although surveyors still need to check out the scene before starting construction.

 

 

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