Handbook of Tunnel Engineering

Maidl, Bernhard; Thewes, Markus; Maidl, Ulrich

doi:10.1002/9783433603499

Cited by 30 publications

(10 citation statements)

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“…So wie auch Litzen‐ und Vollstabanker werden klassische Vollstabmikropfähle in entfestigten Gebirgen oder nicht standfesten Bohrlöchern deshalb im Schutz von Bohrrohren, dem Casing, eingebaut . Der Einbau dieser Bohrrohre ist jedoch aufwendig, er ist wegen größerer Bohrdurchmesser an massivere Gerätetechnik gebunden und beim Bohren über Kopf wegen der zu bewegenden Massen möglicherweise nur schwer beherrschbar. Bei den dann einzubauenden Gewindevollstäben mit Kunststoffripprohren als dauerhaften Korrosionsschutz ist die Herstellung der Koppelstellen mit Schrumpfschläuchen zeitraubend.…”

Section: Auswahl Des Ankersystemsunclassified

Rückverankerung einer Spritzbetonschale im Rahmen einer Tunnelsanierung

Havranek¹

2017

Geotechnik

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Der Effolderbacher Eisenbahntunnel wurde im Jahr 1870 erbaut. Bereits kurz nach Inbetriebnahme musste das Gewölbe teilweise überfirstet und verstärkt werden. In jüngeren Sanierungen wurden in Teilabschnitten Gitterbögen mit Spritzbetonrippen eingebaut und der Sandsteinausbau örtlich mit Ziegelmauerwerk erneuert. Bereits in den 1950er‐Jahren wurde eine Absenkung der Firste um bis zu 0,35 m infolge sich ablösender Gebirgsbereiche festgestellt. Infolge von Wasserzutritt und Frost witterte das ursprünglich 0,25 bis 0,50 m starke Sandsteingewölbe teils stark ab, was dessen Tragfähigkeit stark reduzierte. Deshalb fand eine erste Sofortsicherung mit rückverankertem Spritzbeton bereits im Jahr 2009 statt. Im Rahmen verschiedener Variantenuntersuchungen und Wirtschaftlichkeitsanalysen entschied sich die DB Netz AG für die Sanierung des bestehenden Bauwerks und für den Einbau einer dauerhaften rückverankerten Innenschale. Die Auswahl eines geeigneten Ankersystems ist ein komplexes Thema. Neben der Wahl des Einbauverfahrens, ist die Vielzahl geänderter Baubestimmungen durch Einführung der europäischen Normung, die teils neu herausgegebenen oder an die europäische Normung angepassten eisenbahnspezifischen Regelungen und der aktuelle Stand der Zulassungen zu beachten. Im Beitrag werden anhand der konkreten Baumaßnahme die Gründe diskutiert, die bei der Auswahl eines dauerhaften Ankersystems maßgebend sein können.

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Section: Auswahl Des Ankersystemsunclassified

Rückverankerung einer Spritzbetonschale im Rahmen einer Tunnelsanierung

Havranek¹

2017

Geotechnik

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“…All specimens were prepared by spraying a wet mix concrete using the robotic spraying machine available at Ruhr-University Bochum in order to represent similar conditions to a real tunnel lining situation [4]. This sprayed concrete testing rig allows for a minimisation of manual influences on the quality of the sprayed concrete, which could have a negative influence on the reproducibility of the results [5].…”

Section: Sample Preparationmentioning

confidence: 99%

Mechanical behaviour of a sprayed concrete lining isolated by a sprayed waterproofing membrane

Nakashima

Hammer

Thewes

et al. 2015

Tunnelling and Underground Space Technology

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A waterproofing membrane has an important role in a sprayed concrete lined (SCL) tunnel. In this study, the mechanical behaviour of an SCL with a sprayed waterproofing membrane was investigated by laboratory testing. Two different types of tests were performed to examine the behaviour at different parts of an SCL tunnel linings around a tunnel junction. A four-point bending test was conducted to investigate the behaviour of tunnel linings under a large bending moment, which would represent a section near the opening of a tunnel junction. An eccentric compression test was conducted to investigate the behaviour of tunnel linings under a large compressive axial force (hoop stress) and a relatively small bending moment, which would represent a section at the opposite side of the opening of a tunnel junction. Both test results indicate that an SCL with a sprayed waterproofing membrane behaved as a composite section with very limited slip at the interfaces. Designing the primary lining, the waterproofing membrane and the secondary lining of an SCL tunnel as a composite section could have significant practical implications including time and cost savings.

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“…The control system is the core part, and it is responsible for coordinating the normal work of other parts and completing the data interaction with a remote monitoring center. Because the SBM adopts the rolling impact and shear mode to break the complex rock structure, the vibration is strong, and it has a small operating space, high temperature, high dust concentration, and serious electromagnetic interference, and these factors have a serious influence on the control system [5,6]. In particular, the movement track of the SBM is easy to deviate from the shaft design axis, and the trajectory is out of alignment, which has a direct impact on construction efficiency and quality and even causes safety accidents.…”

Section: Introductionmentioning

confidence: 99%

Multi-Sensor Fusion and Error Compensation of Attitude Measurement System for Shaft Boring Machine

Wang

Liu

et al. 2019

Sensors

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To ensure that the shaft boring machine (SBM) runs along the pre-designed axis steadily, the role of the attitude measurement system is essential, but its accuracy and reliability cannot be guaranteed. Currently, there is no effective technology to meet the actual requirements, and there is a lack of relevant theoretical research in this field. Through further study of the attitude analysis method and multi-sensor fusion technology, this paper presents a dual coordinate method, which can be used to describe the attitude characteristics of the SBM. Moreover, this paper discusses the relationships between the attitude changes and the values of the angle as well as displacement and analyzes the implementation complexity and computational efficiency of related algorithms in software and hardware. According to the working characteristics of the SBM, the hardware design and the reasonable layout of the attitude measurement system are provided. Based on multi-sensor data, this paper puts forward an improved method combining a complementary filter with an extended Kalman filter (EKF) for attitude estimation and error compensation. The simulation experiments of different working processes verify the steady-state response and dynamic response performance of the method. Experimental results show that the dual coordinate method and the proposed filter are more suitable for attitude estimation of the SBM compared to other methods.

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Handbook of Tunnel Engineering

Cited by 30 publications

References 0 publications

Rückverankerung einer Spritzbetonschale im Rahmen einer Tunnelsanierung

Rückverankerung einer Spritzbetonschale im Rahmen einer Tunnelsanierung

Mechanical behaviour of a sprayed concrete lining isolated by a sprayed waterproofing membrane

Multi-Sensor Fusion and Error Compensation of Attitude Measurement System for Shaft Boring Machine

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