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Introducing Maverick's GPR Dept

Ground Penetrating Radar in Edmonton for over 15 Years

What Is Ground Penetrating Radar (GPR)?

Ground-penetrating Radar or GPR service is not sonar, ultrasound, X-ray or ferroscan. GPR is a non-destructive method of locating and analysing subsurface structures by sending and receiving specific frequencies of radio waves. Maverick carries an inventory of specialized systems spanning 1.6 GHz to 50 MHz.

Our selection of antennas is right for work scopes ranging from imaging and analyzing concrete structures on construction sites to collecting data from large scale superficial geological features for mining studies. We have been involved with utility, structural and civil engineering, forensic, archaeological, research, exploration, remediation, and other projects across Canada and around the world.

Maverick provides ground-penetrating radar (GPR) scans in Edmonton, Calgary, Red Deer, Fort McMurray, St Albert, Lloydminster, Hinton, and more.

Ground-penetrating Radar is an economical, safe and effective tool suitable for various industries including construction, oilfield, chemical, manufacturing, engineering, forensics and archaeology. Ground-penetrating radio signals are used to locate and analyse subsurface features embedded in and below concrete, soils, ice and other non-conductive materials.
Depending on the job scope, the results are interpreted in real time or the data is loaded into analysis software for more in-depth examination and reporting.

Ground Penetrating Radar Field Applications:

Analysis software for Ground-penetrating radar.

FAQS:

WHAT ARE SOME BENEFITS OF GPR?

  • Data can be gathered in busy environments without evacuating staff or causing work stoppages
  • For basic job scopes, the data can be analysed and interpreted on site in real time, and for more complex or larger-scale work, analysis software and further digital reporting is available
  • The equipment is portable and does not emit harmful radiation or pose other health risks
  • Ground Penetrating Radar can be combined with other technology and methods such as remote video inspection, infrared inspection, and geomatics

HOW DOES GPR WORK?

Ground Penetrating Radar works by emitting a short pulse of radio waves at specific frequencies. The radio waves travel into the ground (or wall, or ceiling) in a straight line, and will continue to travel in a straight line until they contact a reflective surface. The sending/receiving unit can detect these reflections, and the on-board computer generates images which can be interpreted by the user.

Maverick selects the GPR frequency and model based on the specific application and site conditions.

IS GPR LIKE X-RAY RADIOGRAPHY OR ULTRASOUND?

GPR is different from both of these imaging methods. X-ray is actually Radiography, which uses a radioactive source, and requires site evacuations and other risk factors. Ultrasound uses mechanical sound waves to image conductive materials in high detail. GPR uses radio waves, similar to a cordless phone to locate objects within various surfaces.

Since the introduction of x-ray for the examination of materials, technology has progressed a long way, providing different alternatives for different materials including ultrasonic, infrared, and ground-penetrating radar.

Ground-Penetrating Radar (GPR) is an excellent method for evaluating concrete and locating structures within concrete. It has many benefits when compared with x-ray including the following features:

  • With Ground Penetrating Radar there is no radiation involved, so there are no health hazards. Personnel are not required to be evacuated prior to inspection. With GPR, there is no chance of accidental exposure to gamma radiation, minimizing liability and health risks. Radiography on concrete is not actually “x-ray” technology, since a very strong radioactive gamma source is required, not just an electronic x-ray tube. This source requires special handling and containment to avoid serious exposure to workers and passers-by. Ground Penetrating Radar uses radio waves no more powerful or harmful than those picked up by household radios.
  • With GPR, there is no need to worry about exposure of film, such as is found in dental or medical facilities, or other radioactive-sensitive equipment or materials.
  • There is no parallax error with GPR. You are not casting a “shadow” on to a large film from a single, small radioactive source. GPR is real-time analysis directly above the structures in the concrete.
  • There is no need to correlate the film back to the target area. Structures found with the GPR are marked immediately, and confirmed with a variety of different scanning methods.
  • If the original area is not suitable for coring or cutting, it is very quick and simple to increase the area of the scan with GPR to find a nearby suitable location. With x-ray, this would involve another clearing of the work area of personnel, performing a film exposure, film development and correlation back to the concrete.
  • Ground Penetrating Radar can provide information about the depths of features in the concrete. This is not possible with x-ray.
  • Slab-on-grade evaluations cannot be performed with x-ray, since it is impossible to place the film on the underside. GPR doesn’t have this limitation.
  • Ground Penetrating Radar is quick and portable. It can be performed in an office, retail, hospital, or residential setting with virtually no disruption of regular activities.
  • There are normally cost and scheduling benefits to using Ground Penetrating Radar rather than x-ray.

If there is a situation where Ground Penetrating Radar does not appear to be as effective as desired for any reason, and x-ray is deemed more applicable for the application, Maverick Inspection will inform you. Maverick has a good working relationship with x-ray providers, and understands the benefits and limitations of both technologies. There have even been job-sites in the past where neither technology alone could provide adequate information, and they have been used together to tackle complex inspection scenarios.

Maverick provides ground-penetrating radar (GPR) scans in Edmonton, Fort McMurray, Red Deer, Calgary, Fort Saskatchewan, St Albert, and more.

HOW IS GPR USED IN OIL & GAS, CHEMICAL, AND MANUFACTURING?

  • Collection of data on subsurface conditions prior to critical crane lifts
  • Location of buried or missing pilings, pile caps, tanks and other structures
  • Delineation, saturation and contamination plumes
  • Specialized utility locates

HOW IS GPR USED FOR ENGINEERING?

  • Location of buried well heads and related facilities for reclamation projects
  • Information on concrete structures such as concrete thickness, rebar spacing and placement, void detection, and stirrup locations in beams
  • Data gathering for concrete structures such as sulphur pits, skids, pedestals, foundations, and footings
  • Pipeline and roadway route data-gathering relating to subsurface obstacles such as boulders and ground water

Maverick combines Ground-penetrating Radar (GPR) with other technologies for complete information.

HOW IS GPR USED IN FIELDS SUCH AS ARCHAEOLOGY AND FORENSICS?

  • Updating cemetery records and maximizing their use of space without disturbing older unmarked graves
  • Location of building foundations and other sites of archaeological interest during pre-construction phases
  • Assisting law enforcement agencies in finding stolen objects, murder weapons and missing persons

Maverick is continually finding new applications, adding new capabilities, and customizing radar data collection and analysis methods. There are many more uses for Ground Penetrating Radar, either alone or combined with other technologies, than can be summarized here. Training, mentoring, and research and development programs are in place ensure that Maverick is on the leading edge of Ground Penetrating Radar service, and we are always evolving to anticipate the growing needs of our clients.

 

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