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Sandberg GPR Surveys

GPR surveys to find out what's below the surface.

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    • What is GPR and how does it work?
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  • 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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GPR Case Studies

A sample of our GPR surveys recently undertaken, presented as case studies:

Reading bridge over the river Thames

GPR bridge investigation

GPR investigation to determine reinforcement detail and concrete testing of a bridge over the river Thames.

Entrance foyer of London office; GPR was used to locate services in the floor slab

Floor slab services in a London office

Survey to locate services/conduits in the floor slab of a London office to enable six revolving doors to be fitted.

Corridor in London school

Construction defects in London school

How we used GPR to investigate possible causes of cracking in the roof slab and verify as-built drawings.

Scanning the gas holder base to determine the thickness

Gas holder base thickness measurement

We used GPR to determine the gas holder base thickness non-intrusively and with access to the top only.

GPR survey of a platform at Paddington station

Paddington Station

GPR survey using a multi-channel system to scan 8 platforms and a concourse area to determine construction detail.

St Helen's church in London, - the walls were scanned using GPR to locate voids

St Helen’s church, London – wall voids

GPR survey to locate areas of voiding and their extent within the rubble infill of the 900mm thick walls.

Tendon positions marked-up on warehouse floor slab

Warehouse tendon location mark-up

A non-intrusive GPR survey to locate post-tensioned cables within the floor slab of a working warehouse.

Abseil GPR survey of Wellington Monument

Wellington Monument

The trust’s building surveyor said the GPR study was to help “understand this unique and somewhat complex monument.

GPR survey to locate pad foundations

Pad foundation location survey

GPR used to locate pad foundations on-site in Waterloo. Historic drawings indicated that the building previously on the site.

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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.

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Clapham, London,
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Company No. OC304229

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