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Detection of Rockfall on a Tunnel Concrete Lining with

Detection of Rockfall on a Tunnel Concrete Lining with

Detection of Rockfall on a Tunnel Concrete Lining with ...

Mar 22, 2016  10%  Experiments were conducted using Ground-Penetrating Radar (GPR). The performance of six GPR systems was assessed in terms of: (1) remotely mapping cavities behind concrete linings, (2) detecting rockfall from the tunnel roof onto an inner lining comprising, for example, precast concrete segments. Studies conducted in Norway and the United States

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Detection of Rockfall on a Tunnel Concrete Lining with ...

Request PDF Detection of Rockfall on a Tunnel Concrete Lining with Ground-Penetrating Radar (GPR) Experiments were conducted using Ground-Penetrating Radar (GPR). The performance of

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Detection of Rockfall on a Tunnel Concrete Lining with ...

Rock Mechanics and Rock Engineering. ISSN. 0723-2632

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Use of Ground Penetrating Radar in tunnel maintenance ...

The purpose of this study is to find a fast method for increasing the safety against collapse and rockfall in tunnels using Ground Penetrating Radar (GPR). Rockfall or collapse of the roof in tunnels may occur both during construction and operation of the completed tunnel, as evidenced by major accidents in recent years. The Norwegian expertise is not spared and experienced a serious setback a ...

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Use of Ground Penetrating Radar in tunnel maintenance ...

Use of Ground Penetrating Radar in tunnel maintenance: detection of loose rocks on top of the concrete inner lining A. Lalagüe (1,2) and I. Hoff (2) ... Rockfall or collapse of the roof in tunnels may occur both during construction and operation of the com- ... it detects with success the cavities behind the concrete lining and measures the ...

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Detection of Rockfall on a Tunnel Concrete Lining with ...

Experiments were conducted using Ground-Penetrating Radar (GPR). The performance of six GPR systems was assessed in terms of: (1) remotely mapping cavities behind concrete linings, (2) detecting rockfall from the tunnel roof onto an inner lining comprising, for example, precast concrete segments. Studies conducted in Norway and the United States demonstrate that the GPR technique is a simple ...

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Detection of Rockfall on a Tunnel Concrete Lining with ...

Rock Mechanics and Rock Engineering. ISSN. 0723-2632

get price

Use of Ground Penetrating Radar in tunnel maintenance ...

The purpose of this study is to find a fast method for increasing the safety against collapse and rockfall in tunnels using Ground Penetrating Radar (GPR). Rockfall or collapse of the roof in tunnels may occur both during construction and operation of the completed tunnel, as evidenced by major accidents in recent years. The Norwegian expertise is not spared and experienced a serious setback a ...

get price

Use of Ground Penetrating Radar in tunnel maintenance ...

Use of Ground Penetrating Radar in tunnel maintenance: detection of loose rocks on top of the concrete inner lining A. Lalagüe (1,2) and I. Hoff (2) ... Rockfall or collapse of the roof in tunnels may occur both during construction and operation of the com- ... it detects with success the cavities behind the concrete lining and measures the ...

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Experimental Study on GPR Detection of Voids inside and ...

The ground-coupled GPR systems represent a step forward in the remote detection of rockfall on tunnel concrete linings, and are particularly suited to self-standing inner linings.

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Ground Penetrating Radar Evaluation of Concrete Tunnel

Abstract - Ground penetrating radar was used to map tunnel lining condition and locate concrete deterioration and voids in a continuous and non destructive manner. GPR surveying of Kapoor Water Supply Tunnel, Victoria, Canada was carried out with a 1000 MHz Sensors and Software Ltd., Conquest system mounted on a custom built cart.

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Crack Detection Method for Tunnel Lining Surfaces using ...

Sep 30, 2020  Jeong Hoon Han, In Soo Kim, Cheol Hee Lee, and Young Shik Moon. 2020. Crack Detection Method for Tunnel Lining Surfaces using Ternary Classifier. KSII Transactions on Internet and Information Systems, 14, 9, (2020), 3797-3822. DOI: 10.3837/tiis.2020.09.013.

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Study of infrared thermal application for detecting ...

Apr 01, 2019  This study simulated the defect detection of an unhealthy part of a tunnel concrete lining using field temperature measurements and numerical analyses. A model of the heat transfer in the concrete, tunnel air, and air inside the defected part of the concrete was employed by considering heat transfer mechanisms, and subsequently, validating the ...

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A method of lining seam elimination with angle adaptation ...

The algorithm fills in the blank of concrete tunnel lining surface crack detection technology. 1 INTRODUCTION With the rapid development of road tunnel construction, it is essential to build a safe and reliable high-quality tunnel. The permanent supporting structure constructed with reinforced concrete and other materials around the tunnel ...

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Simulation and Recognition of Concrete Lining Infiltration ...

It is difficult to form a method for recognizing the degree of infiltration of a tunnel lining. To solve this problem, we propose a recognition method by using a deep convolutional neural network. We carry out laboratory tests, prepare cement mortar specimens with different saturation levels, simulate different degrees of infiltration of tunnel concrete linings, and establish an infrared ...

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Detection of Rockfall on a Tunnel Concrete Lining with ...

Jul 20, 2016  Detection of Rockfall on a Tunnel Concrete Lining with Ground-Penetrating Radar (GPR)

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ASNT NDT Library ...

Through the complementation of these two technologies, the nondestructive detection is accurate, the ability to identify abnormal bodies is enhanced, and efficiency is greatly improved. ... I. Hoff, and E. Grøv, 2016, “Detection of Rockfall on a Tunnel Concrete Lining with Ground-Penetrating Radar (GPR),” Rock Mechanics and Rock ...

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Lining seam elimination algorithm and surface crack ...

Nov 17, 2016  The Journal of Electronic Imaging (JEI), copublished bimonthly with the Society for Imaging Science and Technology, publishes peer-reviewed papers that cover research and applications in all areas of electronic imaging science and technology.

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Fulvio Tonon, Ph.D., P.E.

final lining concrete volume calculations. 5. Inspection of the Liberty roadway tunnel (Pittsburg, PA). Demonstration of: 3D model of the tunnel lining intrados textured with high resolution photographs and its use for: lining crack identification and change detection (elongation, formation, and enlargement), concrete spalling identification and

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Detection of Rockfall on a Tunnel Concrete Lining with ...

Detection of Rockfall on a Tunnel Concrete Lining with Ground-Penetrating Radar (GPR) Journal: Rock Mechanics and Rock Engineering > Issue 7/2016

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Detection of Rockfall on a Tunnel Concrete Lining with ...

Jul 20, 2016  Detection of Rockfall on a Tunnel Concrete Lining with Ground-Penetrating Radar (GPR)

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Visual change detection on tunnel linings

Visual change detection on tunnel linings ... in concrete [6 ,20 24 25]. Our main concern is to cap-ture all visual outliers which are not accounted for by understood modes of nuisance variability. Unlike all of the mentioned approaches, we aim to do so by statis-

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(PDF) Detection and Assessment of Seismic Damage in ...

• To provide an integrated package for real-time alert and the assessment of the structural seismic vulnerability of transportation tunnel reinforced concrete primary linings that will include:• A deformation monitoring system based on distributed fibreoptic sensors that will provide real-time measurements of deformation at several critical ...

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Simulation and Recognition of Concrete Lining Infiltration ...

classification and detection of tunnel lining defects. The method of tunnel diseases detection based on deep learning is advantageous because of its automatic construc-tion features, fast recognition speed, and high accuracy. According to the Technical Specification of Maintenance for Highway Tunnel JTG H12-2015, the tunnel leakage diseases

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Analysis of Detection and Treatment Schemes of Highway ...

Tunnel lining crack is the most common disease and also the manifestation of other diseases, which widely exists in plain concrete lining structure.

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A Non-Destructive Inspection Method for Concrete Elements ...

maintenance vehicle and to increase the intensity of the detection and impact lasers. R S /(= + A A A 1 1 2) Table 1 Comparison of the proposed method with different general non-destruc-tive inspection test methods for concrete elements in tunnel linings Fig. 1 Principle of the remote laser sensing system Impact laser Detection laser Dynamic ...

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PAPER OPEN ACCESS ...

Aug 11, 2021  method is largely neglected for tunnel lining structure detection with reinforced concrete invert. Liu et al.[7]detected the uncompact area of tunnel elevation by surface wave method, which proves the validity of surface wave testing. In this study, the feasibility of MASW method in reinforced concrete invert detection is investigated.

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Simulation and Recognition of Concrete Lining Infiltration ...

It is difficult to form a method for recognizing the degree of infiltration of a tunnel lining. To solve this problem, we propose a recognition method by using a deep convolutional neural network. We carry out laboratory tests, prepare cement mortar specimens with different saturation levels, simulate different degrees of infiltration of tunnel concrete linings, and establish an infrared ...

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Experimental Investigation of the Mechanical Behavior of ...

Jun 25, 2020  The presence of voids or lining thinning directly affects the mechanical behavior of linings, and these defects threaten the safety of tunnel operation. In this study, a series of 1/5-scale model tests was used to investigate the mechanical behavior of normal concrete (NC) linings in consideration of voids and combined defects. Test results showed that the void and combined defects ...

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Precast Segmental Lining for Underground Tunnels

Tunnel lining systems prior to the 1940s were characterized by bolting steel plates through flanges, but it was in the late 1900s that the technology of precast concrete tunnel lining segments emerged. ... ‘Line Detection’ technology enables highest precision in production of hollow core slabs

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Selection of tunnel lining materials Gaofei

Apr 13, 2020  The so-called lining refers to the artificially constructed supporting structure, which can be collectively referred to as lining. The tunnel lining can be divided into initial supporting and secondary supporting (secondary lining). Tunnel lining materials should first have sufficient strength, durability, impermeability, corrosion resistance and frost resistance.

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Fulvio Tonon, Ph.D., P.E.

final lining concrete volume calculations. 5. Inspection of the Liberty roadway tunnel (Pittsburg, PA). Demonstration of: 3D model of the tunnel lining intrados textured with high resolution photographs and its use for: lining crack identification and change detection (elongation, formation, and enlargement), concrete spalling identification and

get price

Surveying a Tunnel Using an ROV Hydro Review

Apr 01, 2016  Detection of any cracking, displacements, or separations in the tunnel lining. The general inspection was to provide information including identification and quantification of any debris or rock fall-outs, accumulations of sediment and condition of the rock trap.

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