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 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 Underground Pipeline Identification into a Non-Destructive Case Study Based on Ground-Penetrating Radar Imaging

2021 ◽  
Vol 13 (17) ◽  
pp. 3494 ◽  
Author(s):  
Nicoleta Iftimie ◽  
Adriana Savin ◽  
Rozina Steigmann ◽  
Gabriel Silviu Dobrescu
Keyword(s):  
Ground Penetrating Radar ◽  
Multiple Interfaces ◽  
Background Removal ◽  
Subsurface Sensing ◽  
Different Depths ◽  
Location Depth ◽  
And Migration ◽  
Ground Penetrating ◽  
Non Destructive

Ground-penetrating radar (GPR) has become one of the key technologies in subsurface sensing and, in general, in nondestructive testing (NDT), since it is able to detect both metallic and nonmetallic targets. GPR has proven its ability to work in electromagnetic frequency range for subsoil investigations, and it is a risk-reduction strategy for surveying underground various targets and their identification and detection. This paper presents the results of a case study which exceeds the laboratory level being realized in the field in a real case where the scanning conditions are much more difficult using GPR signals for detecting and assessing underground drainage metallic pipes which cross an area with large buildings parallel to the riverbed. The two urban drainage pipes are detected based on GPR imaging. This provides an approximation of their location and depth which are convenient to find from the reconstructed profiles of both simulated and practical GPR signals. The processing of data recorded with GPR tools requires appropriate software for this type of measurement to detect between different reflections at multiple interfaces located at different depths below the surface. In addition to the radargrams recorded and processed with the software corresponding to a GPR device, the paper contains significant results obtained using techniques and algorithms of the processing and post-processing of the signals (background removal and migration) that gave us the opportunity to estimate the location, depth, and profile of pipes, placed into a concrete duct bank, under a structure with different layers, including pavement, with good accuracy.

Nondestructive Testing in Asphalt Pavements Using Ground Penetrating Radar (GPR)

2013 ◽  
Vol 303-306 ◽  
pp. 525-528 ◽  
Author(s):  
Maria Teresa Françoso ◽  
Carolina Oyama Mota ◽  
Tadeu Rosanti Sugahara Medeiros Lima ◽  
Creso De Franco Peixoto
Keyword(s):  
Nondestructive Testing ◽  
Real Time ◽  
Ground Penetrating Radar ◽  
Asphalt Pavements ◽  
State University ◽  
Radio Waves ◽  
Specialized Software ◽  
Ground Penetrating ◽  
Non Destructive

This paper presents the results of using the system GPR (Ground Penetrating Radar), as an alternative that uses radio waves at frequencies from 10 to 2500 MHz to get data that enable non-destructive conduct inspections of underground or concrete structures in real time. The research aims to investigate asphalt pavements, analyzing the variations in the responses, which can reveal the presence of pathologies or defects. A case study was made acquiring data, at the State University of Campinas - UNICAMP, in Campinas – SP – Brazil, with antennae 270 and 1600 MHz, in pavements with visible defects of patching and alligator cracks, initially with the dry structure and later, wet. The results were processed in specialized software (Radan 7.0) to generate terrain profiles. The GPR showed effective when there is a change in material employed as in the case of patching, because it was possible to detect layers compromised by intensive request of traffic, the start and end of application of the patching and even deformations in the new layer. In contrast, the alligator cracking did not reach the same result, not presenting accuracy in recognizing the defect. The extent of defect was the only well defined feature in the images.

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.

scholarly journals Research on Ground of Penetrating Radar in the Coal Mine Detecting: A Case Study of Application in Huaibei Coal Mine

2019 ◽  
Vol 25 (5) ◽  
pp. 37-42
Author(s):  
Yongsheng Ma ◽  
Jinsong Shen ◽  
Benyu Su ◽  
Yanyan Ma ◽  
Qilong Sun
Keyword(s):  
Electromagnetic Wave ◽  
Coal Seam ◽  
Coal Mine ◽  
Ground Penetrating Radar ◽  
High Frequency ◽  
Surrounding Rock ◽  
Anomalous Body ◽  
Ground Penetrating ◽  
Theory Research

Although many geophysical techniques have been used to detect the disaster geological anomalous body in the Huaibei coal mine company, there are still many mining disasters happening. The main reason is that the coal seam is rich of water in Huaibei coal areas. If the ground water connects with tunnels, it will cause the flood to collapse the coal seam. However, these dangerous geological bodies usually are very hided from the viewpoint of traditional electromagnetic and seismic methods. Due to the great difference of permittivity between the water-bearing rock and the surrounding rock, the high frequency electromagnetic wave can be received by a Ground Penetrating Radar (GPR) to detect the water-bearing rocks. Hence, we try to employ the high frequency electromagnetic wave to detect the water-bearing rock, which frequently results in a coal mining disaster. Firstly, the numerical simulations based on the theory research and its` effectivity analysis are done. Then, the method is used for the coal mine of Huaibei Company. Finally, the comparison between the detected results and the geological drilling information indicates the detection effectiveness of the GPR (Ground Penetrating Radar) in the coal mine tunnel.

scholarly journals Editorial for the Special Issue “Advanced Techniques for Ground Penetrating Radar Imaging”

2021 ◽  
Vol 13 (18) ◽  
pp. 3696
Author(s):  
Yuri Álvarez López ◽  
María García-Fernández
Keyword(s):  
Ground Penetrating Radar ◽  
Radar Imaging ◽  
Non Destructive Testing ◽  
Special Issue ◽  
Destructive Testing ◽  
Subsurface Sensing ◽  
Key Technologies ◽  
Ground Penetrating ◽  
Non Destructive

Ground Penetrating Radar (GPR) has become one of the key technologies in subsurface sensing and, in general, in Non-Destructive Testing (NDT), since it is able to detect both metallic and nonmetallic targets [...]

scholarly journals ROAD PAVEMENT DENSITY ANALYSIS USING A NEW NON-DESTRUCTIVE GROUND PENETRATING RADAR SYSTEM

2010 ◽  
Vol 21 ◽  
pp. 399-417
Author(s):  
Mardeni Bin Roslee ◽  
Raja Syamsul Azmir Raja Abdullah ◽  
Helmi Zulhaidi bin Mohd Shafr
Keyword(s):  
Ground Penetrating Radar ◽  
Radar System ◽  
Road Pavement ◽  
Density Analysis ◽  
Ground Penetrating ◽  
Non Destructive
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