top of page
Cellars-and-Basements.png
ArrowBackground.png

GEOPHYSICAL
ENGINEERING

Cellars & Basements

EngineeringGeophysicsIcon.png

Do you know your basement from your cellar?

 

It’s all down to the designed purpose. Typically, cellars are designed as storage spaces, whereas basements are often finished off as living spaces. Either way, both can prove a problem on development site, particularly if they are now known about prior to starting site works.

 

Ideally the location of any basements and cellars would be investigated at design stage before any development work takes place, but it is as important before siting a crane or erecting scaffolding.

 

The most suitable geophysical technique is Ground penetrating Radar (GPR). This is a high-resolution technique which offers depth information and allows the data to be analysed in plan or section view.

 

The contrast between the roof of a basement or cellar and the space beneath produces a large electrical contrast which is detected by the GPR.  In general, if the construction is simple and flat, the reflections from the roof of the basement should be reasonably smooth and planar (flat) responses. Vaulted basements tend to produce steeply curved upper reflections. The amplitude of the reflected signal diminishes significantly if a basement has been backfilled. If a cellar is full of stock or is disused and has collapsed internally the reflections characteristics become more complex.

 

The GPR data below was collected prior to scaffolding being erected around a building. Three possible basements/cellars were identified at c. 0.7m depth. The planar responses suggest that these are of flat roof construction.

Section-view-of-GPR.png

Above : Section view of GPR, showing two probable basements/cellars with flat roofs and the same data in plan view (Timeslice) showing three possible cellars at c. 0.7m depth (red responses).

The section view below shows two large, dome shaped voids which are suggestive of the remains of buried arched boiler rooms that serviced two former glasshouses within a historic walled garden site.

GPR-view-of-cellar.png

Above : Section view of GPR, showing two probable vaulted basements/cellars (probably boiler rooms) at c. 0.5m depth.

ArrowBackgroundLong.png
SideStripes.png

FREE SURVEY QUOTATION

 

Receive a FREE Survey quotation from one of our survey engineers?

 

Chat through any requirements you need, including site survey, survey methodologies and detail requirements.

Geophysical Engineering Surveys
 

360Degree.png

Air Raid Shelters

360Degree.png

Cellars & Basements

360Degree.png

Post Tension Cables

360Degree.png

Underground Storage Tanks

360Degree.png

Air Voids

360Degree.png

Chimney Flues

360Degree.png

Rebar

360Degree.png

Water Engineering

360Degree.png

Badger Setts

360Degree.png

Earthing Installations

360Degree.png

Sinkholes

360Degree.png

Burials

360Degree.png

Geological Application

360Degree.png

Soil Thermal Resistivity Testing

360Degree.png

Buried Foundations

360Degree.png

Landfills

360Degree.png

Structural Investigations

360Degree.png

Buried Manholes

360Degree.png

Mineshafts

360Degree.png

Tree Roots

bottom of page