Fertigteile im Tunnelbau

Fischer, Oliver; Nevrly, Tobias; Behnen, Gereon

doi:10.1002/9783433603352.ch8

Cited by 6 publications

(8 citation statements)

References 3 publications

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“…The tubbing length with 635 mm was chosen so that any influence in the area of the longitudinal joint could be excluded. The thickness and the dimensions of the contact surface of the test specimens were chosen based on a tubbing cross section frequently used in Austrian tunnel constructions as well as with the equations and guidelines from Fischer et al 26 A tunnel with an outer diameter Ø o of at least 8 m was assumed, resulting in a tubbing thickness of 400 cm (Ø o /20). The recommended tubbing width was calculated to be 2 m. Due to the maximum possible force application of 18 MN in the testing rig, the test specimens had to be scaled in their width by a factor of 0.35.…”

Section: Methodsmentioning

confidence: 99%

Longitudinal joints of tubbings with newly designed high‐strength reinforcement

Wolfger

Proksch‐Weilguni

Kollegger

2021

Structural Concrete

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Continuous tunneling using a tunnel‐boring machine is a very popular method when it comes to the construction of large tunnel projects. The use of precast reinforced concrete elements, called tubbings, is a highly economical way to secure the tunnel post excavation. Unfortunately, a loss of the load‐bearing capacity has been observed in the past in the joints between the tubbings. Reasons for that are among others the required reduction of the cross section in the longitudinal joint area and, above all, the high normal compressive forces that arise due to soil pressure. This paper describes experimental testing of longitudinal joints of tubbings conducted at TU Wien. The increase of the load‐bearing capacity of a newly designed and optimized tubbing with high‐strength joint‐compressive reinforcement, which was developed and patented by the Institute of Structural Engineering at TU Wien, is presented. The high‐strength steel is characterized by its high yield strength of 670 MPa, as well as the very large available bar diameters of up to 75 mm. This new optimized tubbing enables the production of thinner tubbings compared to conventional designs, and can thus achieve a reduction in material, transport and excavation costs.

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Section: Methodsmentioning

confidence: 99%

Longitudinal joints of tubbings with newly designed high‐strength reinforcement

Wolfger

Proksch‐Weilguni

Kollegger

2021

Structural Concrete

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“…In this case, the stress affecting the lining is primarily caused by the load generated by the rock and water pressure, as well as secondarily, by the load caused by temperature and pressure/suction, additional load and traffic load as well as load from shrinkage and creeping. The cavity and/or the tunnel shell are calculated and dimensioned in accordance with Eurocode 7 [1] and/or Eurocode 2 [2], see [3]. As is known, the New Austrian Tunnelling Method (NATM) (also referred to a Sequential Excavation Method (SEM)) is based on the load-bearing capacity of the rock mass by forming a so-called load-bearing ring [4,5].…”

Section: Einführungmentioning

confidence: 99%

Strukturoptimierung von Spritzbetonschalen – Versagensanalysen von Spritzbetonschalen bei Betrachtung von Vortriebsoptimierungen

Cordes¹,

Voit

2023

Geomechanics and Tunnelling

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A framework with a robust design of the driving classes is fundamental for the tunnel design. During tunnel advance, the detailed design of the lining is depending on the documented geology and the observed system behaviour. To reduce costs, the excavation profile is optimized with the aim of reducing overbreaks and shotcrete masses. This achieved profile accuracy is beneficial for the load‐bearing capacity of the rock and the shotcrete lining. For temporary and permanent tunnel shotcrete linings, the excavation profile accuracy influences the stress distribution, the crack pattern and the expected deformations. In the course of this study, the effect of the excavation geometry on the load‐bearing capacity of the primary lining of drill and blast tunnels was examined. For this purpose, shotcrete linings, reinforced by steel meshes and fibre‐reinforced linings, were compared in optimized and non‐optimized scanned excavation cross‐sections. In each case, an ultimate load and failure analysis was carried out to assess shells in the hardened state by means of numerical modelling (ATENA). The aim is to determine the load‐bearing capacity of the shell structure in order to obtain a conclusion regarding its structural robustness. The interaction between the rock/soil soil and the structure as well as a time‐dependent material behaviour were not considered. It could be shown how an irregular overbreak or an inconsistent shell thickness has a negative effect on the load‐bearing capacity of the structure.

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“…Dies liegt in erster Linie daran, dass die Konstruktionen einfacher sein können, da, anders als im Hochbau, eine dämmende bzw. schützende Schicht beim segmentierten Tunnel‐ [9] oder Brückenbau [10] nicht notwendig ist. Viele Anforderungen, die für den Gebäudesektor gelten (Dichtigkeit, geringer U‐Wert, Behaglichkeit etc.…”

Section: Einleitung: Serielles Bauen Im Hochbau Und Ingenieurbau Im V...unclassified

“…Vorbilder zur Abdichtung und Verbindung durch Fügung (Bilder 9, 10) können z. B. aus dem einschaligen Tunnelbau (Tübbings) [9] übernommen werden. Mithilfe von Abdichtungen aus bspw.…”

Section: Vorbilder Aus Dem Tunnel‐ Und Segmentbrückenbau Für Die Entw...unclassified

Entwicklung von Prototypen für Balkone und Loggien aus Infraleichtbeton (ILC) unter Berücksichtigung bauphysikalischer Aspekte und der Anforderungen aus der Fertigung

Mendgen

2023

Bautechnik

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Im Rahmen des von der DBU (Deutsche Bundesstiftung Umwelt) geförderten Forschungsprojekts ILVO (Vorfabrikation von Fertigteilen aus Infraleichtbeton) wurden 2019–2021 Fertigteile aus ILC für den Geschosswohnungsbau an der TU Berlin entwickelt. Die daraus resultierenden Protoypen wurden 2022–2023 in Form von Modellen in der Ausstellung „Technoscape: The Architecture of Engineers“ (Kuratoren: Maristella Casciato, Pippo Ciorra) im MAXXI Museum in Rom ausgestellt. Das Bauen mit großformatigen Elementen aus Infraleichtbeton (ILC) bietet eine Reihe an Vorteilen gegenüber dem herkömmlichen Bauen mit Wärmedämmverbundsystemen (WDVS). Dies wird im Geschosswohnungsbau insbesondere bei der Konstruktion von Fenstern, Balkonen und Loggien deutlich. Details, die sonst kompliziert und aufwendig sind und gerade im Bereich von Wärmebrücken Probleme aufweisen, können mit Infraleichtbeton neu gedacht werden. Im Folgenden sollen die Vorteile des Bauens mit großformatigen Elementen aus Infraleichtbeton im Geschosswohnungsbau aufgezeigt werden. Darauf aufbauend werden die Grundlagen des Entwurfs, der Konstruktion sowie der Fertigung von großformatigen Elementen aus Infraleichtbeton erklärt und die Entwicklung von drei exemplarischen Prototypen (französischer Balkon, Balkon, Loggia) für den Geschosswohnungsbau erläutert. Weiter wird ein Bezug zum seriellen Bauen im Hochbau und Ingenieurbau hergestellt.

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Fertigteile im Tunnelbau

Cited by 6 publications

References 3 publications

Longitudinal joints of tubbings with newly designed high‐strength reinforcement

Longitudinal joints of tubbings with newly designed high‐strength reinforcement

Strukturoptimierung von Spritzbetonschalen – Versagensanalysen von Spritzbetonschalen bei Betrachtung von Vortriebsoptimierungen

Entwicklung von Prototypen für Balkone und Loggien aus Infraleichtbeton (ILC) unter Berücksichtigung bauphysikalischer Aspekte und der Anforderungen aus der Fertigung

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