Structure Investigations
Mapping and investigating Cemetaries / Graves
Bookmarks to

and
Road Pavement
Radar is being used to investigate, image and define road pavement
In the USA and Europe its the standard.
1. GPR gives the construction thickness of the pavement.
2. It can detect where construction changes (use to target BH’s)
3. GPR can detect Rebars
4. Use it to map changes with time (repeat surveys)
5. It’s a quick way to assess bigger areas
Applications
* Road QA QC
* Airport pavements
* Parking area
* Asset / Infrastructure Management
This is what a typical air launched Radar setup looks like
Compare GPR directly to AC Core
The radar data is collected by running the antenna across the surface, the makes an image, the base of the pavement shows up as the semi horizontal line at 19 nS (about 700mm) depth
Applications for Radar on Road projects

* Estimate void content of AC
* Map thin overlays
* Detect defects
* Use to map deterioration
* Use to map where properties change
* Locate delaminating within the pavement
* Locate void or water within the pavement
* Locate and image voids below the pavement
Radar used for Imaging Structure
Olympic Pool
The image below shows the floor of a swimming pool. The client was concerned that leaks in the pool floor could cause piping erosion and ultimately failure of the pool base. This was an Olympic size pool. The pool was drained down for remedial work and (fortunately) we had a dry surface to work on. It would have been very challenging if the pool was full as it was up to 3 m deep at one end. The defects showing at the Right of the image are grout paced as part of the remedial work. It was good we could report to the client that there were not defects showing with radar that could show there was piping under the pool
The image below is is a plan view version of the 3D image, the grouted area shows at the right of the image. The cross pattern is the jointing between the slabs the form the pool base.
Subsurface Imaging also apply other techniques such as Resistivity Imaging, EM, Seismics, Magnetics for Structure investigations
Email or call us for more information