Ground Penetrating Radar (GPR) is suitable for a wide variety of survey types. Its main advantage is that it detects changes in the sub-surface, making it suitable for detecting not just metallic objects, but also most other materials including plastic, asphalt, voids and layer interfaces. Being non-destructive and non-invasive, it can be used in occupied premises with minimal disturbance to the occupants. It is particularly suited for listed and historic buildings, where more intrusive methods are not permitted.
Sandberg have developed Ground Penetrating Radar survey techniques for the Civil Engineering sector, in particular, building inspection and investigation. This complements the range of consultancy, quality management, testing and inspecting services on construction industry materials offered by Sandberg.
We specialise in the innovative use of GPR in the Civil Engineering and Building sectors. Find out more about our twelve most common GPR surveys:
Chimney flue location surveys
A fast and efficient NDT method for the locating chimney flues within walls.
Concrete floor slab surveys
Determine reinforcement detail, slab thickness and changes in construction.
Locating services and conduits
Location of service conduits within floor screeds and reinforced concrete slabs.
Detecting embedded metal in masonry
Surveys to locate embedded beams, columns, metal dowels, pins and cramps.
Locating Tendon Ducts
Accurate location of tendon ducts in post-tensioned or pre-stressed concrete.
Locating underfloor heating pipes
Our site surveys can locate pipes used in the majority of underfloor heating systems.
On-site mark-up surveys
Sometimes a simple site mark-up survey is all that is required. We do that too.
Railway ballast thickness and evaluation
NDT surveys to determine the condition and thickness of railway ballast.
Rebar mapping and concrete imaging
High-resolution rebar mapping, far superior to that offered by other techniques.
Retaining wall surveys
GPR surveys offer NDT determination of construction detail and thickness.
Void location surveys
Void detection in most materials incl. concrete, stone walls and below concrete slabs.
Wall and slab thickness measurement
GPR surveys to determine the thickness of screed, concrete slabs and walls.