Ground penetrating radar (GPR) is especially useful in roadway inspection applications. Before beginning any pavement work on a roadway, a detailed and thorough inspection and analysis is required in order to accurately gauge the pavement’s condition. It is increasingly required in roadway work to confirm that work has been completed without unnecessarily creating voids under the surface which will sink in time.
Concrete Visions, a spin-off of G&M Services, provides quality roadway inspection services to clients in Maryland, Baltimore, Washington, D.C., Pennsylvania, and Virginia. Our expert technicians are highly trained and skilled to ensure that they are able to complete each and every job according to strict quality standards. Our staff members have more than 25 years of experience in the concrete scanning, coring, drilling, and sawing industry, ensuring that they will be able to complete your project with the care and expertise required.
GPR in roadway inspection – increasingly a requirement
For transportation departments, engineers, and highway professionals, accurate and reliable methods of evaluating road conditions are extremely important. Many contractors have tried to make their lives easier by drilling holes that are larger than necessary beneath roadways which can lead to significant structural concerns over time. In some instances, state agencies are now requiring that the work done by roadwork companies be certified with documentation that assures there is no voided signal due to a hole being drilled too large. Whether planning, preservation, or rehabilitation is required, the first step is an accurate analysis of the roadway’s current condition. Concrete coring was the traditional method of analysis, but this comes with inherent problems.
Benefits of using GPR for roadway inspection
Ground penetrating radar offers a reliable and non-intrusive roadway inspection method that is accurate, safe, and non-destructive. GPR is able to analyze both base as well as sub-base layers, a benefit not offered by traditional methods such as coring. Even better, GPR is far less labor intensive than many of the available alternatives and requires no disruption of the roadway’s surface.
GPR produces incredibly reliable results that are offered in real time. Our field mechanics can send the results of a GPR scan to their supervisor who is then able to clean up the images and send them along to the client and/or structural engineer to be reviewed. GPR can be used to scan concrete that is up to 24” deep, though best results will be acquired with depths of 16-18” as the images will be much more clear in this range. GPR is also much safer than concrete x-ray for roadway inspection as it releases no radiation and gives off less of a signal than a cell phone.