The Ground Penetrating radar (GPR) is a non-evasive detection and imaging method that uses radio waves to capture images below the surface of the ground. It can be used to identify subsurface elements either underground or within a surface such as concrete, asphalt, metals or masonry.
How does the GPR work?
This non-destructive method uses electromagnetic radiations in a particular frequency or frequency bands to detect reflected signals from subsurface structures. The GPR has two main parts, the transmitter, and a receiving antenna. The transmitter sends the signal into the subsurface being investigated while the receiver receives the signal reflected by the subsurface. Experienced GPR technicians interpret readings of the reflected signals to determine what type of material has been located. The GPR device also detects variations in the ground material compositions.
Applications of GPR
The possible applications of GPR is endless, it can be used to detect or image buried metals, plastics, PVC, concrete rebars, voids or cracks, natural materials, underground utility line detection, geologic mapping – rock layering and changes, groundwater tables, depth to bedrock, mineral ore mapping and more.
GPR penetration depth and limitation.
The depth of penetration of a GPR depends on the frequency of the antenna, our company has a vast range of antenna that can penetrate as deep as 40 meters with high resolution images. We also have antenna which are very suitable for very high resolutions shallow subsurface imaging applicable for concrete, asphalt, or soil scanning.
The GPR has depth penetration limitations, ground or surfaces with high electrical resistivity can limit the penetration depth of the GPR. Our experienced technicians will be able to assess your site’s condition to determine if GPR can be used accurately.
Advantages of Ground Penetrating Radar
GPR is a non-invasive and cost-effective method of surveying. It provides valuable information even before workers break ground or start any destructive or excavation works.
GPR is safe for use in private and public spaces.
It detects metal and non-metal objects, as well as voids and underground irregularities.
It can be used to detect the dimensions of target (length, breath, depth, and thickness).
Target mapping can be done in real time and has the ability to cover large site area in a little or small time.
Antenna Frequencies can be changed or controlled to deliver a range of resolution and penetration depths.
Data collected during the survey can be seen immediately or used in later projects.