A sample of our GPR surveys recently undertaken, presented as case studies:
GPR bridge investigation
GPR investigation to determine reinforcement detail and concrete testing of a bridge over the river Thames.
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.
Construction defects in London school
How we used GPR to investigate possible causes of cracking in the roof slab and verify as-built drawings.
Gas holder base thickness measurement
We used GPR to determine the gas holder base thickness non-intrusively and with access to the top only.
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, London – wall voids
GPR survey to locate areas of voiding and their extent within the rubble infill of the 900mm thick walls.
Warehouse tendon location mark-up
A non-intrusive GPR survey to locate post-tensioned cables within the floor slab of a working warehouse.
Wellington Monument
The trust’s building surveyor said the GPR study was to help “understand this unique and somewhat complex monument.
Pad foundation location survey
GPR used to locate pad foundations on-site in Waterloo. Historic drawings indicated that the building previously on the site.