Timorese Academic Journal of Science and Technology
ISSN : 2617 - 4944 (Print) ISSN : 2617 - 4952 (Online)
Buried Iron Pipe Detection Using Ground Penetrating Radar: a Case Experiment
Author(s):
Moises Soares,
Filomeno J. Alves,
Domingos da Silva,
Eustaquio A. Amaral,
Norberto S. Celestino,
Marcelo C Valenca,
Antonio de Jesus Lira,
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Abstract: This work presents an experiment of GPR (Ground Penetrating Radar) instrument (LMX200) to identify a buried iron pipe. Data measurements were conducted in two directions; sensor directions perpendicular and parallel to the long axis of a pipe. An iron pipe is 80 cm in length and 8 cm in diameter. It is buried horizontally at the depth of 70 cm. The top of the pipe is positioned at 60 cm in burial depth. The obtained image in perpendicular to the pipe shows a hyperbola-shape with its apex at 0.6 m, while that in parallel to pipe shows a flat reflection at the same depth. Therefore, the image in the perpendicular measurement is highly recommended for buried utility investigation. For the deeper target (> 2 m), we need to use low frequency to obtain better images.
Keywords: GPR, iron pipe, hyperbola-shape, flat reflection, and sensor direction.