The survey was aimed to determine the structural layers thickness and to discover structural abnormal areas of underlying soils.
GPR OKO-2 with three antenna units were used for the survey:
- AB-1700 – is used for close investigation of the paved surface upper layer and determination of reinforcement and its spacing.
- AB-1200 – features lower resolution, however allows to determine the pavement structure till the natural bed.
- AB-400 – is used to study bottom soils.
Interpretation of radargrams obtained by different antenna units
![](https://gpr.geotechru.com/wp-content/uploads/2021/11/ulan-ude1.jpg)
Multiple decompression zones were detected during survey. Such zones appeared, probably, due to the concrete plates manufacturing technique violation.
Examples of distinguishing reinforcements and abnormal areas in structural body
![](https://gpr.geotechru.com/wp-content/uploads/2021/11/ulan-ude2.jpg)