Ground penetrating radar system for detection of desiccation cracks in soils

Conference item


Levatti, HU, Prat, P, Ledesma, A and Cuadrado, A (2013). Ground penetrating radar system for detection of desiccation cracks in soils. Third International Symposium on Computational Geomechanics (COMGEO III). Krakow, Poland 21 - 23 Aug 2013 London South Bank University.
AuthorsLevatti, HU, Prat, P, Ledesma, A and Cuadrado, A
Abstract

In this paper we explore a relatively simple, non-destructive, indirect technique using a ground penetrating radar (GPR) system to detect cracks that form and propagate inside a soil specimen during desiccation. Although GPR devices have been used for multiple applications, their use in the detection of small cracks (few millimetres wide), has not been demonstrated yet. The experiments and the methodology used to test the accuracy of a small commercial GPR device for crack identification are described. The main objective was to identify what type of signals and what crack width can be detected using the GPR device. The results indicate that cracks of one or two millimetres wide can be detected depending on its position and shape. On the other hand, sub-millimetre cracks are undetectable with the currently existing devices in the market. In spite of the limitations the GPR method can be useful to find time-related bounds of when the cracks appear, and to point at their location. Because the GPR systems are in constant evolution this technique could become a very versatile and convenient method to scan soils under different kinds of processes both in the laboratory and in the field.

KeywordsGPR; Cracks in soils
Year2013
PublisherLondon South Bank University
Accepted author manuscript
License
CC BY 4.0
Publication dates
Print21 Aug 2013
Publication process dates
Deposited27 Mar 2017
Accepted31 Mar 2013
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https://openresearch.lsbu.ac.uk/item/878y9

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