Place of testing: Russia, Moscow, NAO, MZ “Ukraine” - Serednevo-Maryino-Desna, bridge over the Likova river.
The length of the surveyed section of the highway with the bridge: 538 m. Track length: 1076 m. (right and left side of the highway).
The bridge has a beam structure; the length of the bridge is 164 meters, the width is 20 meters. As of March 2021, construction work on the construction of the bridge has been completed, but the section of the highway has not been put into operation.
Date and time of the survey: 14.03.2021 from 16-15 to 16-35. Air temperature +1C.
Testing goals
- Testing the performance of antennas 50 Mhz.
- Testing of antenna covers L-44/410.
Equipmen
The GEORA X20 GPR complex consists of:
- Receiver X20,
- Transmitter 10 kV,
- Antennas 50 Mhz (3 м.)
Survey method
Parallel penetration; the distance between the antennas is 4 meters.
GPR sounding results
I. Bridge construction
On the right (north-south, first figure) and left (south-north, second figure) sides of the route, the bridge structure, temperature-strain joints are clearly visible.
The design uses 2 monolithic metal parts; below is a photo during their installation (first photo) and at the end of it (second photo).
III. Radio images of lighting poles
When displayed in monochrome, the regular radio images of the lighting poles are clearly visible.
A very visual representation of the structures under the ground is given by black-and-white processing of "Processing of GPR Data" LLC.
