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Sandberg GPR services

Ground Penetrating Radar services offered by Sandberg

  • About
    • About Sandberg
    • What is GPR and how does it work?
    • Ground Penetrating Radar equipment
    • Ground Penetrating Radar FAQ
  • GPR surveys
    • Chimney flue location
    • Concrete floor slab surveys
    • Locating conduits in concrete slabs
    • Locating embedded metal in masonry
    • Locating Tendon Ducts
    • Locating underfloor heating pipes
    • On-site rebar mark-up surveys
    • Railway ballast evaluation
    • Rebar mapping and concrete imaging
    • Retaining wall surveys
    • Void location surveys
    • Wall and slab thickness measurement
  • GPR Case Studies
    • Bridge investigation
    • Detection of services in floor slab
    • Identifying construction defects
    • Gas holder base thickness
    • Paddington Station
    • St Helen’s church, London
    • Warehouse tendon location
    • Wellington monument investigation
    • Pad foundation location survey
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On-site rebar location and mark-up surveys

Reinforcement marked-up in-situ on slab soffit

Sometimes all you need is a simple on-site mark-up survey to locate the position of reinforcement, tendons, services, etc. so you can drill or cut safely. Our GPR surveys offer deeper penetration and better resolution than Ferroscan or Cover Meter.

Ground Penetrating Radar detects changes in the sub-surface, therefore it will detect metallic and non-metallic features making it suitable for detection and location of rebar, tendons, underfloor heating pipes, voids and other features within concrete. Results can be interpreted in real-time making it a quick and efficient method.

High-frequency GPR offers several advantages over other, more traditional methods, such as Cover Meter and Ferroscan:

  • Greater depth penetration
  • Higher resolution
  • Typically, GPR can resolve two layers of reinforcement
  • Will detect non-metallic features such as plastic pipes or conduits
  • Small scanning head available allowing scanning to within 45mm of an obstruction

Site survey

Our GPR surveyors are trained in house and have considerable site experience. This experience and expert knowledge mean that we offer a reliable and quality service, helping to reduce risks during the cutting and drilling stage to an absolute minimum.

Although site mark-up surveys usually involve small local areas (e.g. for a single fixing or slab penetration), they can also be used for larger areas if required.

Tendon positions marked-up on warehouse floor slab
On-site mark-up survey of tendons in a warehouse floor slab

Deliverables

Generally, no off-site data processing is required. The GPR data is inspected by our surveyor in real-time using the display screen on the GPR control unit. The position of detected features is picked in the data and their position marked up on-site using chalk, engineers crayon or paint.

Need more information?

Contact us to find out more about our GPR on-site rebar location and mark-up surveys and how we can help you:

Telephone: 0207 565 7056
Email: gpr@sandberg.co.uk

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Sandberg GPR

We undertake GPR site surveys with data interpretation and reporting across the UK and abroad. Do not hesitate to contact us with your requirements.

Our Office

5 Carpenters Place,
Clapham, London,
SW4 7TD

Company No. OC304229

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