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18.10.2021, 09:15
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GPR uses radio waves as a GPR scanning device, with the frequency used ranging from 50 to 3000 MHz. GPR equipment consists of two major parts – the transmitter and an antenna receiver.
The transmitter sends radio waves underground, which penetrate soil, dirt, and other materials. When the radio waves collide with objects, the radio signal bounces back, refracts, and echoes the signal. The antenna receiver then records the ‘echo’ from the collision. The antenna receiver only detects signals returning from the object or objects it has collided with and will record other vital details and differences between every returning echo.
A GPR system uses software to interpret the data. Once interpreted, a visualisation of the shape, material, composition, and other important information about the object underground is created. The system converts the data into easily understandable forms, like maps of the structures and objects, mineral formations, man-made utilities, and so on that are buried underground.
The signals emitted by a Ground Penetrating Radar survey can locate a variety of objects buried underground. GPR signals are most effective if there is a large difference in the electromagnetic characteristics of the item compared to the materials surrounding it. That means GPR is most effective at detecting, for example, metallic objects, plastics, concrete, PVC, and a wide range of natural materials.
Because GPR surveys can detect a wide variety of materials, there are many practical applications for the equipment across a wide range of industries. The most common uses of GPR surveys include checking for utility pipes and lines buried underground; visualising rock formations and other geological features like air pockets; gathering groundwater data; noting changes in ground strata, bedrock visualisation; GPR evaluation; and more.
Ground Penetrating Radar (GPR) is a geophysical locating technique. It utilises radio waves to scan underground, giving you an accurate picture or impression of any subsurface location, item, or object. GPR surveys are carried out using fully non-destructive technology, so there is no damage nor any other adverse side effects to the area being scanned.
GPR surveying costs tend to vary depending on the location being surveyed, the complexity of the GPR equipment that needs to be used, and various other factors. Typically, the average price of a complete GPR survey is between £18,800 and £36,000.
If you choose to have your GPR survey conducted by professional GPR survey contractors, be prepared to spend £780 to £1,800 a day on their services. This price could change depending on the extent of the GPR survey needing to be carried out and whether you will need a detailed report of the findings afterwards.
Many businesses use the cost of the service as the main criterion when deciding whether to hire in this service. Notably, they will ask for quotes from GPR surveying companies and then opt for the cheapest one. However, the quoted price should not be the main consideration. You should also be able to understand the differences between various GPR surveyors and what is included in their quotes. You will often find that the cheapest quote will not necessarily offer you the full extent of the services you require.
If you are looking for high-quality GPR surveys, speak to KB Surveys, the leading GPR survey provider in the UK. Our team has many years of experience and a great track record in providing GPR surveying to a long list of customers in the UK and globally. We provide efficient and accurate results at competitive prices.
Our company employs various state-of-the-art GPR systems, allowing us to gather more data from every survey than others. Our team consists of highly experienced engineers, archaeologists, and GPR surveyors. Regardless of whether you need data for demolition or construction; for archaeological purposes; or simply to investigate the nature of what’s below the surface on a piece of land, we will provide you with the most accurate and precise data.
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If you are interested in our services, speak to us today on 020 3931 5759. If you would like to contact us in writing, use the contact form available on our website at www.kbgprsurveys.co.uk/contact/, or message us directly to our email address at info@kbgprsurveys.co.uk.
What is a GPR survey?
GPR stands for Ground
Penetrating Radar. It is geophysical locating method that can capture images
below the ground by using minimally invasive radio waves. GPR can locate
utilities, structures and other objects underground without disturbing the
surface or any need to dig down, which is one of its greatest advantages.
How accurate is GPR?
GPR surveying is the
most effective method of non-destructive testing, but it cannot promise 100%
accuracy. There are still many factors that can affect the testing, including
the conditions and material that make up the scanning area, the individual operating
the equipment, and so on. You can maximise your chances of success by hiring
expert GPR surveyors.
What is the frequency
of a Ground Penetrating Radar?
Ground Penetrating
Radar has a frequency of 50 to 3000 MHz. GPR is the general term for techniques
that uses radio waves to map structures and discover objects buried
underground. These objects might include man-made structures like utility lines
and pipes, rock obstructions, air pockets, bedrock, groundwater tables, and
more.
Can GPR penetrate
concrete?
GPR survey equipment
is mainly designed to detect what is below ground. However, many businesses
also use the technique on concrete surfaces. Even if the concrete is
reinforced, the Ground Penetrating Radar can detect objects through the
surface. The construction and engineering industries often use GPR to detect
the rebar in concrete.
What are benefits of
GPR?
GPR has various
advantages over other methods. The operation is self-contained, quiet, and
non-hazardous, so you will not have to worry about causing disturbance to the
local area. GPR scanning can detect both metallic and non-metallic materials
and their depth, offering results instantly. GPR can penetrate up to 2ft of
concrete.
What are applications
of GPR in construction?
Ground Penetrating
Radar or GPR inspecting is a method used to identify elements positioned
subsurface. It is non-destructive imaging method that can be used for both
underground detection and beneath surface of concrete structures. GPR is a
perfect for construction as it can even detect reinforcing bars and metallic
ducts.
GPR evaluation is
highly cost-effective. Before GPR, engineers had to excavate a project area in
its entirety to detect what lay underneath. This cost of considerable amount of
money and time, with the possibility of still not finding everything that was
sited underground. GPR is a far more accurate and cheaper method of detecting
elements below the earth's surface. The process usually takes less than a day
to survey an entire area (depending on the size), which is far faster than the
excavation option.
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