Ground Penetrating Radar Data Acquisition to Detect Imbalances and Underground Pipes

Bachiri, Tahar; Alsharahi, Gamil; Khamlichi, Abdellatif; Bezzazi, Mohammed; Faize, Ahmed

doi:10.1007/978-981-33-6893-4_92

Cited by 3 publications

(4 citation statements)

References 23 publications

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“…Trace of the defect appears only partially in the area where it is not hidden by the frames. Similar results were obtained in [11].…”

Section: Resultssupporting

confidence: 90%

“…Ground Penetrating Radar (GPR) is a non-destructive technique that has been successfully used in the evaluation of civil engineering structures, such as reinforced concrete structures and utilities buried under pavements or sidewalks [1][2][3]. For structures that need to be rehabilitated and which do not have detailed technical documents, the GPR is a precious tool for locating and determining the amount of rebars to be restored.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Examinating GPR based detection of defects in RC builds

Bachiri

Hamdaoui²,

Alsharahi³

et al. 2022

MATEC Web Conf.

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The Ground Penetrating Radar is a device which can be used for non-destructive inspection of civil engineering structures such as reinforced concrete buildings and bridges. Because of its ability to detect defects and provide reliable image of the substructure, it has attracted large interest from both practitioners and researchers in the field of health monitoring of vital structures. The objective of this work is to analyze detectability of defects in reinforced concrete structures by considering the presence of a defect which can attenuate GPR signals. Defects embedded in the structure can in fact cause significant changes in the intensity of the hyperbolic like reflection patterns generated by reinforcement bars. To assess this effect, a numerical simulation study of GPR data was conducted by using the GprMax software which is based on finite differences time domain method. The proposed approach has enabled to study the modification affecting the radargram due to the presence of a defect of finite size.

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“…Trace of the defect appears only partially in the area where it is not hidden by the frames. Similar results were obtained in [11].…”

Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Examinating GPR based detection of defects in RC builds

Bachiri

Hamdaoui²,

Alsharahi³

et al. 2022

MATEC Web Conf.

Self Cite

View full text Add to dashboard Cite

show abstract

“…While some studies have reviewed the general application of GPR in civil engineering [3,4] or focused on on-site inspections for specific constructions [5], there is still a notable lack of comprehensive critical evaluation of GPR's effectiveness in corrosion assessment for reinforced concrete. GPR has demonstrated its utility in detecting buried networks and examining reinforced concrete structures, thanks to its improved vertical resolution and strong signal reflection from high conductivity bars [6][7][8]. The authors' objective is to gain deeper insights into the capabilities and limitations of GPR in detecting and quantifying reinforcement corrosion, aiming to enhance corrosion assessment practices in civil engineering structures.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of bridge deck reinforcement corrosion based on analysis of GPR data

Bachiri,

Khamlichi,

Hamdaoui

et al. 2024

IRASE

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This study explores the impact of corrosion on Ground Penetrating Radar (GPR) responses through practical experiments and numerical modelling, focusing on rebar diameter reduction, corrosion product layer thickness, crack formation and corrosion product filling in vertical and transverse crack. Practical experiments involved GPR testing of reinforced concrete slab. By analyzing B-scans we identify areas with moderate and severe corrosion. Numerical modelling using the Finite Difference Time Domain (FDTD) Method to model GPR signal propagation in a concrete bridge deck with corrosion is applied. Key finding includes a significant 26.70% increase in reflected wave amplitude when corrosion product filling in vertical crack increased by 400%, highlighting its extensive effect on signal GPR propagation. Reduced rebar diameter led to a 9.79% amplitude decrease and a 0.06 ns arrival time delay. Increased corrosion product layer thickness primarily affected arrival time with a 0.06 ns extension but significantly amplified GPR signal amplitude. These findings offer insights for improving GPR based corrosion detection and assessment methods, leading to more robust systems for concrete bridge deck inspection and maintenance. This paper contributes to understanding how corrosion affects the signal that is detected by GPR. This information can be used to improve the way that we manage and assess corrosion in concrete bridge deck.

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“…This GPR device was judged suitable for the inspection of the sub-surfaces, particularly for the assessment of location of buried pipes in soils and rebars in RC structures. It was successful in monitoring cracks in bridges, roads, pavements and tunnels [1][2][3][4][5]. However, this non-destructive testing technique can involve some shortcomings affecting the stages of data collection, analysis and interpretation.…”

Section: Introductionmentioning

confidence: 99%

Numerically based qualitative evaluation of GPR vertical and horizontal resolutions for reinforced concrete structures

Bachiri

Hamdaoui²,

Alsharahi³

et al. 2022

MATEC Web Conf.

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The GPR is widely used for non-destructive evaluation of reinforced concrete structures. High resolution of detection is needed in order to differentiate between multiple targets present in the host medium. This article aims to numerically study the vertical and horizontal resolutions associated to detection of reinforcing bars buried in a structure made from concrete by means of GPR inspection. Use was made of open source software GprMax2D by considering the three work frequencies: 1GHz, 1.6GHz and 2GHz. The method of scanning is assumed to be according to B-scan protocol which was conducted along a profile traced on the surface of the inspected member. In situ measurements were made for a bridge pillar made of reinforced concrete by the MALÅ CX GPR system with a frequency centred on 1.6 GHz. The obtained results show that the GPR is effective in the examination of reinforced concrete structure and most of the steel bars can be detected. After making correction, the horizontal resolution predicted by a conventional formula was verified. However, the real vertical resolution imposes a minimum distance separating steel bars that is higher than that proposed in the literature. This is due to the high conductivity of steel bars that yields strong reflection of the signal at the first reached bars and which impedes significant secondary reflection from targets located below them.

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Ground Penetrating Radar Data Acquisition to Detect Imbalances and Underground Pipes

Cited by 3 publications

References 23 publications

Examinating GPR based detection of defects in RC builds

Examinating GPR based detection of defects in RC builds

Numerical modelling of bridge deck reinforcement corrosion based on analysis of GPR data

Numerically based qualitative evaluation of GPR vertical and horizontal resolutions for reinforced concrete structures

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