How to Use GPR for Foundation Repairs
We use GPR for foundation repairs when we need to see beneath the soil before digging. Whenever we need to use GPR for a job, we team up with GPR Arkansas & Geotechnical Services LLC. Using GPR allows us to see underground, and also helps us locate potential obstacles we might face during the project. Unlike X-Rays or metal detectors, Ground Penetrating Radar uses radio waves to detect objects and anomalies beneath the ground’s surface. We like using GPR over other methods because it is far more effective for locating utilities, voids, and other hazards.
Locate voids, utilities, and other anomalies under ground prior to digging anything up.
Before digging anything up for foundation repairs, it’s important to know where utility pipes and other anomalies are located. That’s where the GPR unit comes in! The GRP unit resembles a lawnmower, which makes it easy to move in a grid-like pattern for a thorough reading.
While covering the area, a transmitter emits a radio wave into the ground. These high-frequency, polarized radio waves will respond differently when they encounter an object or change in structure. They may reflect, refract, or scatter back to the surface depending on what is beneath the surface. The GPR unit deciphers these waves and creates an image of what is below the ground. Then, a map is created of these readings. It takes a trained operator to understand what the images are and what they mean. To the trained eye, they can determine the difference between objects, types of soil, and other anomalies.
Below are a few key things we look for using GPR:
- Underground utility lines and pipes
- Changes in ground strata
- Geological features and rock obstructions
- Air pockets or voids
- Excavated and back-filled areas
- Groundwater tables
Using GPR for foundation repairs is a great way to save time and money.
In addition to being a huge time and money saver, GPR has many other advantages. GPR is safe to use in public spaces and can be used at a wide variety of project sites. This surveying method gathers the dimensions and locations of underground utility lines, as well as metal and non-metal objects, and voids or underground irregularities all in one session. Lastly, Ground Penetrating Radar is a non-evasive process, which means that your landscaping and lawn will be left intact. Give us a call to schedule your free in-home estimate today!