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Ground & root radar FAQ

Here we answer common questions about ground-penetrating radar and its wide range of applications.

Do you have any questions that aren’t answered here, or would you like a personal consultation to discuss your specific needs?

Which measuring principle is used?

Our ground penetrating radar equipment is used to record and map the subsurface in the highest resolution. With the help of the Proceq GS-8000 and the TreeRadar BS-900, we detect metallic, as well as non-metallic lines and other objects in the underground. The soil is not destroyed during the collection. The measuring procedure is based on the use of a transmitter-receiver antenna. The transmitter antenna sends electromagnetic pulse waves underground. The wave velocities of the soil penetration differ here depending on the subsoil conditions. If the wave hits an object in the ground, the pulse wave is reflected by the object and detected by the receiver antenna. It is shown as a radargram in the form of a hyperbola on the display.

measuring principle

How is the location or object recorded?

By using a powerful GPS antenna and precise recording of the geo-coordinates with the help of up to 30 satellites, the location can be recorded exactly. This is done via multiband GPS + Glonass + Galileo + Beidou.

Recording of the location by means of GPS data

How is it measured?

The scan data is collected by means of a GPR antenna in the form of electromagnetic pulses. The dielectric value can be used to determine the length, depth, diameter and type of object and to display individual soil layers. 

live measurement road

How is the data analysed?

Using software for the ground penetrating radar equipment that has been specially developed for the evaluation of GPR data, specific objects can be quickly identified and clearly marked in the scans. This makes it possible to evaluate the data directly on site.

Evaluation by means of special software

In which formats can the measurement results be made available?

Due to the multitude of file formats in which the evaluated data can be output, SEGY, KML, DXF, DWG, SHP and HTML, the data can be built up and printed by means of map programs or conversion in CAD to physical or digital plans.

Creation of site plans, definition of the ramming areas

What does the documentation look like?

The collected and evaluated data and plans can be made available at the end of the project in pure data form or also in physical form through plans and on data carriers for use on the construction site or for passing on to customers.

Documentation in file form

Can traffic safety be offered during the measurement work?

Temporary or long-term construction site protection according to RSA (guidelines for the protection of work sites on roads) is also possible to ensure the protection of workers and also road users during the measures. Please contact us about this.

traffic safety

Which measurement methods are used?

We offer the following measurement methods: Line Scan, Grid Scan, Free Path, A-Scan, Line Scan and Migrated Line Scan.

Example scan Free Path/Grid Scan

How does the measuring principle work?

“Electromagnetic (EM) induction and ground penetrating radar (GPR) are geophysical techniques routinely used to investigate the near-surface subsurface for engineering and environmental purposes (Annan and Daniels, 1998; Greenhouse and Slaine, 1983; and Olhoeft, 1986). These two methods have been widely used in recent decades to meet the growing need for a non-invasive and cost-effective method to characterise contaminated sites.

Both techniques have proven useful for locating subsurface features that contain contaminants and for mapping geological features that may influence or trap the flow of contaminants below the surface.

Cross-sectional view of the near-surface subsoil

What requirements must be met to obtain accurate results?

To achieve optimum measurement results, we need a dry surface, the area should be accessible and free of obstacles and, if possible, any existing plans should be included.

Ideal surface conditions
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Download our ground and root radar brochure in PDF format.

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Our experts develop customized concepts for your individual situation. Let us put together an optimal concept for the effective detection of roots, supply lines or contaminated sites in the scanning area.

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Volkmann Strassen-
und Verkehrstechnik GmbH

Hohe Strasse 9-17
56410 Montabaur

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