Ground Penetrating Radar (GPR)
GPR is at its best when analyzing structures in tunnels, buildings or shallow targets such as top soils on ground. GPR can also be applied to locating infra targets such as underground pipes or powerlines. Due to its high resolution and cheap and fast execution, GPR can also be used as a supportive method in, for example, refraction seismic measurements. GPR can also be done from borehole.
Geovisor has special knowledge about the GPR based GPR EDZ –method. This method is used in tunnels and engineering project, because it can determine the depth and extent of the excavation damage zone.
GPR creates reflections wherever electric impedance changes in the ground, allowing it to map various targets, from soil structures to infra objects. GPR gives very high-resolution results and is relatively fast and cheap method.
Transmitter, receiver and batteries are usually built into one equipment, which allows the entire system to be moved by a single person. The measurements are done by moving the equipment along the predetermined measurement lines. The frequency of the used antenna effects to the resolution and the penetration depth. The measurement setups are chosen according to the target and the location.
We use GSSI SIR-3000 and SIR-4000 devices with 100-2600 MHz antennas. These can be used for a wide variety of different projects.
However, if necessary, you can ask for alternative equipment. Geovisor has connections to equipment rental companies and an extensive cooperation network.
Client will always receive quality assessed raw data from the surveys. Additionally, we provide the data processing and interpretation of the results. Reporting according to request and introduction to the survey results will be done as requested.