Use of Automatic Target Recognition System for the Displacement Measurements in a Small Diameter Tunnel Ahead of the Face of the Motorway Tunnel During Excavation

Klopčič, Jure; Ambrožič, Tomaž; Marjetič, Aleš; Bogatin, Sonja; Pulko, Boštjan; Logar, Janko

doi:10.3390/s8128139

Cited by 3 publications

(2 citation statements)

References 3 publications

(4 reference statements)

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“…To ascertain this, it is necessary to collect detailed technical information to achieve the best and fastest results with the lowest possible time and costs [11]. As is the case for construction phase [12], the whole tunnel intrados should be investigated to know the inner geometry of its surfaces: the laser scanner (LS) technology permits to investigate both the roof and the profile of the wall using automated systems [13][14][15], while the ground penetrating radar (GPR) technology permits to monitor the railway platform profile [16].…”

Section: Introductionmentioning

confidence: 99%

Railway Freight Transport and Logistics: Methods for Relief, Algorithms for Verification and Proposals for the Adjustment of Tunnel Inner Surfaces

et al. 2018

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In Europe, the attention to efficiency and safety of international railway freight transport has grown in recent years and this has drawn attention to the importance of verifying the clearance between vehicle and lining, mostly when different and variable rolling stock types are expected. This work consists of defining an innovative methodology, with the objective of surveying the tunnel structures, verifying the clearance conditions, and designing a retrofitting work if necessary. The method provides for the use of laser scanner, thermocameras, and ground penetrating radar to survey the geometrical and structural conditions of the tunnel; an algorithm written by the authors permits to verify the clearances. Two different types of works are possible if the inner tunnel surfaces interfere with the profile of the rolling stock passing through: modification of the railroad track or modification of the tunnel intrados by mean milling of its lining. The presented case study demonstrates that the proposed methodology is useful for verifying compatibility between the design vehicle gauge and the existing tunnel intrados, and to investigate the chance to admit rolling stocks from different states. Consequently, the results give the railway management body a chance to perform appropriate measurements in those cases where the minimum clearance requirements are not achieved.

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Section: Introductionmentioning

confidence: 99%

Railway Freight Transport and Logistics: Methods for Relief, Algorithms for Verification and Proposals for the Adjustment of Tunnel Inner Surfaces

et al. 2018

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“…ATR technology is widely employed as the essential technique in advanced systems such as within the military [ 4 , 5 ], security [ 6 , 7 ] and modern medical science [ 8 ]. It enables a radar to catch its object of interest [ 9 , 10 ], helps a seeker find the fixed target in a complicated scenario [ 3 , 11 ], and makes the accurate diagnosis possible with medical sensors [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

A Compact Methodology to Understand, Evaluate, and Predict the Performance of Automatic Target Recognition

Wang

et al. 2014

Sensors

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This paper offers a compacted mechanism to carry out the performance evaluation work for an automatic target recognition (ATR) system: (a) a standard description of the ATR system's output is suggested, a quantity to indicate the operating condition is presented based on the principle of feature extraction in pattern recognition, and a series of indexes to assess the output in different aspects are developed with the application of statistics; (b) performance of the ATR system is interpreted by a quality factor based on knowledge of engineering mathematics; (c) through a novel utility called “context-probability” estimation proposed based on probability, performance prediction for an ATR system is realized. The simulation result shows that the performance of an ATR system can be accounted for and forecasted by the above-mentioned measures. Compared to existing technologies, the novel method can offer more objective performance conclusions for an ATR system. These conclusions may be helpful in knowing the practical capability of the tested ATR system. At the same time, the generalization performance of the proposed method is good.

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Influence of the geological structure on the displacements measured ahead of the Šentvid tunnel face in small diameter exploratory tunnel / Einfluss der Geologie auf die in einem Erkundungsstollen vor der Ortsbrust des Sentvid‐Tunnels gemessenen Verschiebungen

Klopčič

Zivec

Žibert

et al. 2013

Geomechanics and Tunnelling

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The Šentvid tunnel had first been designed as twin tube double‐lane tunnel. Later on, the design included the third traffic lanes and connecting ramp tunnels. The underground junctions required the construction of large caverns. A small diameter exploration gallery was excavated in order to find the optimum locations for both caverns in foliated Perm‐Carboniferous soft rock conditions and to provide geotechnical model and material parameters for the design. The exploration gallery furthermore enabled displacement measurements ahead of the excavation face of the main tunnel during its construction. This paper presents some details of the exploration gallery and the results obtained from it, showing the results of displacement measurements ahead of the tunnel face and comparisons of the observed displacements ahead of the tunnel face with geological conditions.The tunnel construction won international attention due to its complexity and as an example of best practice in the construction of very large excavations in diverse geotechnical conditions. During the decision making process, an international panel of recognized experts from consulting companies and universities was involved. Later on, the panel regularly monitored the progress of tunnelling works and contributed to the decisions during critical steps of the project. The decision to involve international experts with different experiences and approaches permitted the client to keep the construction risks within acceptable limits.Der Sentvid‐Tunnel war zunächst mit zwei Röhren mit jeweils zwei Fahrstreifen geplant worden. Später wurde der Entwurf um einen dritten Fahrstreifen und Verbindungstunnel erweitert. Die unterirdischen Verzweigungen erforderten die Errichtung von großen Kavernen. Ein Erkundungsstollen mit kleinerem Durchmesser wurde ausgebrochen, um die optimalen Standorte für die beiden Kavernen im weichen, geschieferten Fels aus dem Perm bis Karbon zu finden und um geotechnische Modell‐ und Materialparameter für den Entwurf zu erhalten. Der Erkundungsstollen hat weiterhin ermöglicht, Setzungsmessungen im Bereich vor der Ortsbrust des Haupttunnels während dessen Errichtung durchzuführen. In diesem Artikel werden einige Details des Erkundungsstollens und der mit seiner Hilfe gewonnenen Ergebnisse dargestellt. So werden die Ergebnisse der Messungen der der Ortsbrust vorauslaufenden Setzungen gezeigt und ein Vergleich der beobachteten Setzungen mit den geologischen Verhältnissen angestellt.Der Tunnelvortrieb hat international Aufmerksamkeit auf sich gezogen aufgrund seiner Komplexität und als vorbildliches Praxisbeispiel für die Errichtung von sehr großen Hohlräumen in den unterschiedlichsten geologischen Verhältnissen. In den Entscheidungsprozess war ein internationaler Ausschuss von anerkannten Experten aus Beratungsfirmen und Universitäten eingebunden. Im weiteren Verlauf hat dieser Ausschuss regelmäßig den Fortschritt der Arbeiten an dem Tunnel verfolgt und in kritischen Phasen des Projektes bei wichtigen Entscheidungen unterstützt. Die Entscheidung, internationale Experten mit verschiedensten Erfahrungen und Herangehensweisen einzubinden erlaubte dem Kunden, das Risiko der Baumaßnahme in einem akzeptablen Rahmen zu halten.

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Use of Automatic Target Recognition System for the Displacement Measurements in a Small Diameter Tunnel Ahead of the Face of the Motorway Tunnel During Excavation

Cited by 3 publications

References 3 publications

Railway Freight Transport and Logistics: Methods for Relief, Algorithms for Verification and Proposals for the Adjustment of Tunnel Inner Surfaces

Railway Freight Transport and Logistics: Methods for Relief, Algorithms for Verification and Proposals for the Adjustment of Tunnel Inner Surfaces

A Compact Methodology to Understand, Evaluate, and Predict the Performance of Automatic Target Recognition

Influence of the geological structure on the displacements measured ahead of the Šentvid tunnel face in small diameter exploratory tunnel / Einfluss der Geologie auf die in einem Erkundungsstollen vor der Ortsbrust des Sentvid‐Tunnels gemessenen Verschiebungen

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