Non-Destructive Evaluation of Reinforcing Rebar Radius by Digital Image GPR Technique

2014 ◽  
Vol 501-504 ◽  
pp. 847-851
Author(s):  
Che Way Chang ◽  
Chen Hua Lin ◽  
Shyi Lin Lee ◽  
Ping Huang Chen ◽  
Ching Cheng Jen ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Behavior Analysis ◽  
Physical Model ◽  
Digital Image ◽  
Ground Penetrating Radar ◽  
High Efficiency ◽  
Non Destructive Evaluation ◽  
Energy Zone ◽  
Ground Penetrating ◽  
Non Destructive

Ground Penetrating Radar (GPR) is a high efficiency technology to detect the cylindrical medium in the concretes material. The electromagnetic wave is incidental to double-rebar, and measures the reflection signal behaviors from energy zone. The results from the reflection signal of electromagnetic wave of the reinforcement concretes allow evaluating the radius of double-bar (1.6cm, 1cm). A physical model can effectively measure the radius of double-bar by the result of electromagnetic wave reflex behavior analysis. The results indicate that, this techology is capable of estimating the reinforcing double-bar radius to within 6%.

scholarly journals Investigation structural settlement by Ground Penetrating Radar (Case study)

2022 ◽  
Vol 961 (1) ◽  
pp. 012037
Author(s):  
Marwan Sulayman Abdullah ◽  
Hussein Hameed Karim ◽  
Zeena Waleed Samueel
Keyword(s):  
Electromagnetic Wave ◽  
Ground Penetrating Radar ◽  
High Accuracy ◽  
Differential Settlement ◽  
Cement Injection ◽  
Before And After ◽  
Ground Penetrating ◽  
Non Destructive ◽  
Geotechnical Application

Abstract Electromagnetic wave is transferred by the GPR (ground penetrating radar), and A geotechnical application may benefit from this non-destructive test. This study is proposed to estimate the type and soil problem location that causes differential settlement of a structure (pumping station) by GPR surveying. The survey is achieved before and after the treatment by cement injection method to identify the locations that took cement injections as a full injection, partial or not at all using two types of antennas (160,450) MHz. The study also will estimate the thickness of the foundation by GPR and comparing it with actually executed. The results showed the creeping soil has occurred in some parts of the soil under the foundation, and after soil treatment, most of these parts were taken injection, and others did not. Also, it was found the relatively high accuracy of GPR for detecting the thickness of the raft foundation.

NON-DESTRUCTIVE EVALUATION OF BRIDGE DECKS USING GROUND PENETRATING RADAR

2014 ◽  
Author(s):  
Aleksandra Varnavina ◽  
Aleksey Khamzin ◽  
Evgeniy Torgashov ◽  
Brandon Goodwin ◽  
Lesley Sneed ◽  
...  
Keyword(s):  
Ground Penetrating Radar ◽  
Bridge Decks ◽  
Non Destructive Evaluation ◽  
Ground Penetrating ◽  
Non Destructive

Ground-Penetrating Radar Detection of the Defects in Tunnel Lining

2010 ◽  
Vol 163-167 ◽  
pp. 3794-3797 ◽  
Author(s):  
Yong He Liu ◽  
Ding Yan Wu ◽  
Jun Xing Wang
Keyword(s):  
High Resolution ◽  
Ground Penetrating Radar ◽  
High Accuracy ◽  
Tunnel Lining ◽  
Practical Work ◽  
Waveform Analysis ◽  
Radar Detection ◽  
Non Destructive Evaluation ◽  
Ground Penetrating ◽  
Non Destructive

Because of High-resolution, high accuracy, rapid and efficient, Ground-penetrating radar has been widely used in engineering testing as one of non-destructive evaluation (NDE) methods. Combined with practical work, this paper introduced how to use the ground-penetrating radar in tunnel liner testing, the detection, preferences and waveform analysis, etc.

NON-DESTRUCTIVE EVALUATION OF BRIDGE DECKS USING GROUND PENETRATING RADAR

2014 ◽  
Author(s):  
Aleksandra Varnavina ◽  
Aleksey Khamzin ◽  
Evgeniy Torgashov ◽  
Brandon Goodwin ◽  
Lesley Sneed ◽  
...  
Keyword(s):  
Ground Penetrating Radar ◽  
Bridge Decks ◽  
Non Destructive Evaluation ◽  
Ground Penetrating ◽  
Non Destructive

The Application of LTD-2100 GPR (Ground Penetrating Radar) in Inspection of Concrete Structures

2012 ◽  
Vol 424-425 ◽  
pp. 1282-1286 ◽  
Author(s):  
Feng Xie ◽  
Cheng Cheng Wang
Keyword(s):  
Ground Penetrating Radar ◽  
Concrete Structure ◽  
Large Scale ◽  
High Efficiency ◽  
Detection Method ◽  
Scale Construction ◽  
Structure Quality ◽  
Monitoring Tools ◽  
Ground Penetrating ◽  
Non Destructive

At present, a large-scale construction of concrete structure sprout up all over china, it is imperative to inspect the concrete carefully, efficiently and accurately with portable monitoring tools as speedy bulk construction required. This paper sets out by analyzing LTD-2100 radar diagnosis waveform in concrete structure safety, and then compares the interpretation of waveform with sampling concrete examination. Eventually, the consistent result reflects the non-destructive detection method of this radar has high value, for its high resolution examination, accurate positioning defects with high efficiency and easily operates which could benefit to engineers from real-time monitoring of concrete structure quality.

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