The article describes the basic methods of GPR data processing which used to help emphasize radIn focus of the discussion are the approaches to GPR data handling so that to distinguish anomalous patterns in radar charts which may be indicative of the presence of voids behind the lining. The data on voids are the basis for starting grouting. The features of amplitude equalization, Hilbert transformation and horizontal filtering are described, and the efficiency of these data processing techniques is explained.

The amplitude equalization allows correcting for quick signal attenuation pointing at the presence of voids behind the lining. The best way is the use of statistical parameters calculated in sliding window and used later on as equalizing coefficients. The horizontal filtering in the sliding window makes it possible to accentuate details of wave field and anomalies in the radar charts. The Gilbert transform produces a waveform envelop containing reduced information as compared with the initial path. As a result, the simplified wave pattern, with the highlighted features of signals-identifiers, facilitates the interpretive decision-making.

Issue number: 1
Year: 2018
ISBN:
UDK: 550.8.05:[624.19:625.42]
DOI: 10.25018/0236-1493-2018-1-0-19-25
Authors: Nabatov V. V., Gaysin R. M.

About authors: Nabatov V.V., Candidate of Technical Sciences, Assistant Professor, Gaysin R.M., Candidate of Technical Sciences, Assistant Professor, National University of Science and Technology «MISiS», 119049, Moscow, Russia, e-mail: ftkp@mail.ru.

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