Artikeldatenbank
Autor(en) | Titel | Zeitschrift | Ausgabe | Seite | Rubrik |
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Kromoser, Benjamin; Strieder, Emanuel; Kirnbauer, Johannes | Selbstvorspannende ultrahochfeste Betonelemente - Die Aktivierung von mit eisenbasierten Formgedächtnislegierungen bewehrten Betonelementen durch thermische Nachbehandlung | Beton- und Stahlbetonbau | 5/2019 | 315-326 | Fachthemen |
KurzfassungHerrn Prof. Dipl.-Ing. Dr.phil. Dr.techn. Dr.-Ing. E.h. Konrad Bergmeister zu seinem 60. Geburtstag gewidmet x | |||||
Empelmann, Martin; Cramer, Jonas | Modell zur Beschreibung der zeitabhängigen Rissbreitenentwicklung in Stahlbetonbauteilen | Beton- und Stahlbetonbau | 5/2019 | 327-336 | Fachthemen |
KurzfassungDie Begrenzung der Rissbreite ist eine wesentliche Bemessungsaufgabe bei Stahlbetonkonstruktionen, um Gebrauchstauglichkeit und Dauerhaftigkeit zu gewährleisten. Unter Langzeitbeanspruchungen vergrößern sich die Rissbreiten durch das zeitabhängige Materialverhalten von Beton. Aufgrund der Überlagerung der unterschiedlichen Effekte (Verbundkriechen, Betonkriechen und Betonschwinden) sind konsistente und mechanisch basierte Untersuchungen für eine zuverlässige Vorhersage der Rissbreiten unerlässlich. Zu diesem Zweck wurde ein rheologisches Modell entwickelt. Das Modell wurde anhand von Versuchsergebnissen unter Langzeitbelastung validiert und zeigt eine sehr gute Übereinstimmung zwischen den zeitabhängigen rechnerischen und experimentellen Rissbreiten. x | |||||
Brühwiler, Eugen; Friedl, Herbert; Rupp, Christoph; Escher, Hanspeter | Bau einer Bahnbrücke aus bewehrtem UHFB - Weltweit erste Bahnbrücke aus UHFB auf einer Hauptlinie | Beton- und Stahlbetonbau | 5/2019 | 337-345 | Berichte |
KurzfassungHerrn Prof. Dipl.-Ing. Dr.phil. Dr.techn. Dr.-Ing. E.h. Konrad Bergmeister zu seinem 60. Geburtstag gewidmet x | |||||
Bechmann, Roland; Schmid, Angelika; Noack, Torsten; Sobek, Werner | Neuland in Planung und Realisierung: Die Kelchstützen des neuen Stuttgarter Hauptbahnhofs | Beton- und Stahlbetonbau | 5/2019 | 346-355 | Berichte |
KurzfassungIm Rahmen des Bahnprojekts Stuttgart-Ulm wird der Stuttgarter Hauptbahnhof komplett umgebaut und erneuert. Der alte Kopfbahnhof wird hierbei durch einen unterirdischen Durchgangsbahnhof ersetzt. Wesentliches Gestaltungselement der neuen Bahnsteighalle sind die sogenannten Kelchstützen. Diese tragen nicht nur das Schalendach, sondern dienen auch der natürlichen Belichtung und Belüftung des Innenraums. Der vorliegende Beitrag beschreibt Formfindung und Berechnung dieser einzigartigen Geometrien und erläutert, wie durch die Tragwerksplanung eine technisch und ökonomisch nachhaltige Umsetzung ermöglicht wurde. x | |||||
Kongresse - Symposien - Seminare - Messen | Beton- und Stahlbetonbau | 5/2019 | 355 | Veranstaltungskalender | |
Beton- und Stahlbetonbau aktuell 5/2019 | Beton- und Stahlbetonbau | 5/2019 | 357-366 | Beton- und Stahlbetonbau aktuell | |
Kurzfassung
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68. Geomechanics Colloquium | Geomechanics and Tunnelling | 5/2019 | Cover Pictures | ||
KurzfassungCurrently, the City of Edmonton's public transportation system in Edmonton, Canada is being expanded by the addition of a new line - the Valley Line. The first stage, a 13.1 km long section, includes besides other feature a 400 m long twin tube tunnel, which southern portal was secured by an AT-Pipe Umbrella System with threaded nipple couplings. (Foto: DSI Underground) x | |||||
Content: Geomechanics and Tunnelling 5/2019 | Geomechanics and Tunnelling | 5/2019 | Contents | ||
Schubert, Wulf; Moritz, Bernd | 68. Geomechanics Colloquium / 68. Geomechanik-Kolloquium | Geomechanics and Tunnelling | 5/2019 | 396 | Editorials |
News: Geomechanics and Tunnelling 5/2019 | Geomechanics and Tunnelling | 5/2019 | 398-409 | News | |
KurzfassungDriving of Filder Tunnel completed / Vortrieb im Fildertunnel beendet x | |||||
Leitner, Andreas | People: Geomechanics and Tunnelling 5/2019 | Geomechanics and Tunnelling | 5/2019 | 411-412 | People |
KurzfassungObituary: Baurat h.c. Dipl.-Ing. Nejad Ayaydin / Nachruf Baurat h.c. Dipl.-Ing. Nejad Ayaydin x | |||||
Nebois, Christian; Gartner, Ilse; Herzfeld, Thomas | Vienna Underground, Neubaugasse Station - Preparatory works and challenges on the surface / U-Bahn Wien, Station Neubaugasse - Vorarbeiten und Herausforderungen an der Oberfläche | Geomechanics and Tunnelling | 5/2019 | 417-423 | Topics |
KurzfassungThe U2 station Neubaugasse will become one of the busiest interchange stations in the Vienna underground network, with passengers changing between the existing line U3 running along under the Mariahilfer Straße and the new line U2 crossing the Mariahilfer Straße. The Mariahilfer Straße, one of the best known shopping streets in Vienna with shopping centres and high numbers of passers-by in the middle of a densely built-up residential area, and its side streets have been redesigned in the last few years with the aim of traffic calming and creating new public spaces. x | |||||
Schmeiser, Josef; Hoppe, Peter; Theiss, Reinhold | Technical and logistical challenges of the construction of the Museumsinsel Station in Berlin / Technische und logistische Herausforderungen beim Bau des Bahnhofs Museumsinsel in Berlin | Geomechanics and Tunnelling | 5/2019 | 426-433 | Topics |
KurzfassungThe closing of the gap in line U5 of the Berlin underground completes the missing connection between the Alexanderplatz and Brandenburger Tor stations. The existing line U5 currently ends at the Alexanderplatz. With the closure of the gap, the existing tunnels at the Berliner Roten Rathaus will be connected to the Brandenburger Tor station on the line U55. The project includes the construction of three new underground stations and two single-track tunnels connecting them, which are being tunnelling by shield machines. The new alignment thus passes deep under the city, under the River Spree, the new Berliner Schloss and the Spreekanal as well as running along beneath the street Unter den Linden to the Brandenburger Tor. The construction activities are taking place right in the centre of Berlin and the particular local conditions are a logistical and technical challenge. x | |||||
Zeidler, Kurt; Gall, Vojtech | Modern urban tunnelling - Responding to social needs | Geomechanics and Tunnelling | 5/2019 | 434-439 | Topics |
KurzfassungUrban Tunnelling requires handling of a wide range of ground conditions and multiple challenges generated by work access constraints, settlement sensitive structures, as well as testing socio economic needs such as limitations to noise and dust emissions as well as impact on traffic. Such projects and their bespoke technical solutions come at a price. The realisation of large-scale urban infrastructure projects is often accompanied by intensive discussions about the cost in support of the social need for such projects. This article provides socio-economic reasoning for major urban infrastructure projects and insight in selected technical solutions that are required to realise these projects in urban settings. x | |||||
Urschitz, Gerhard J. | At the Limit - Soft-ground tunnelling under the city highway of Toronto / Am Limit - Lockergesteinsvortriebe unter der Stadtautobahn von Toronto | Geomechanics and Tunnelling | 5/2019 | 440-449 | Topics |
KurzfassungDuring the Design-Build-Finance procurement of the “RER Highway 401 Rail Tunnel”, the option with two single SEM tunnels was selected as preferred alternative. The challenges of this project lie not only in the conditions and requirements by the Ministry of Transportation of Ontario, the owner of the highway above and the existing tunnel beside the new tunnels, but also in construction beneath one of the busiest highways in North America. Pre-support measures for tunnel excavation, which cannot involve any type of grouting directly beneath the roadway surface, were evaluated based on their risk exposure, resulting in the selection of a pipe jacked umbrella above the tunnel crowns. A sophisticated monitoring programme is implemented with online access at any time to allow for immediate response and implementation of pre-determined mitigation measures as required. x | |||||
Laubbichler, Jürgen; Schwind, Thomas; Karner, Christian; Gakis, Angelos | Innovative NATM solutions for major subway stations in North America - An overview of recent developments and project case histories | Geomechanics and Tunnelling | 5/2019 | 450-455 | Topics |
KurzfassungSince the first mined subway stations were constructed in Washington, DC in the mid-80s, European engineers and construction professionals have been promoting the benefits of the conventional tunneling method for major urban infrastructure projects throughout North America. In recent years, significant advances have been made in the use of numerical design tools, innovative construction approaches, fiber reinforced shotcrete mixes and the increased use of robotics and laser-scanning equipment. This article provides an overview of key technologies and innovations applied on recent projects, including Chinatown Station in San Francisco; Parliament, Lyon and Rideau Stations in Ottawa; and Laird, Avenue and Oakwood Stations in Toronto. x | |||||
Lienhart, Christoph; Chiaverio, Flavio; Rauscher, Wolfgang; Kurtz, Matthias | Feuerbach and Bad Cannstatt Tunnels - special requirements of the inner-city Location and difficult geotechnical Conditions / Tunnel Feuerbach und Bad Cannstatt - spezielle Anforderungen bei innerstädtischer Lage und schwierigen geotechnischen Verhältnissen | Geomechanics and Tunnelling | 5/2019 | 456-466 | Topics |
KurzfassungThe Feuerbach and Bad Cannstatt Tunnels on the Stuttgart 21 project are two central elements of the future Stuttgart inner-city rail node. Due to the central location in the middle of Stuttgart, there are particular requirements for construction operations and logistics. These effects are additionally reinforced by the very difficult geological and geotechnical conditions in the valley of Stuttgart: very changeable strengths of the prevailing formations of the gypsum Keuper, sometimes with shallow overburden with dense building and roads above. The tunnel also passes through sections with anhydrite content, which tends to swell on contact with water. In this paper, both the challenges of the inner-city location are described and the methods and solutions used to counter an impairment of structural safety and serviceability in the anhydrite sections. x | |||||
Schachinger, Tobias; Arbeiter, Florian J.; Eichinger, Stefanie; Saliger, Florian | Research on pipe materials for tunnel drainage by the ÖBB Task Force Drainage / Forschung der ÖBB-Task Force Drainage zu Rohrmaterialien der Tunnelentwässerung | Geomechanics and Tunnelling | 5/2019 | 467-471 | Topics |
KurzfassungDue to the additional tunnels that are currently under design or construction, drainage maintenance costs are expected to rise significantly over the next few years. An increased amount of maintenance will also be necessary due to older drainage pipes damaged during intensive cleaning and flushing. To counter these problems, an internal task force for drainage pipes has been installed within the ÖBB. Together with research institutions from several fields of science, projects are being carried out to find ways to decrease the overall maintenance effort. Topics include screening of possible rehabilitation methods for damaged pipes, and investigation of currently used materials with regard to their mechanical suitability. A multi-disciplinary research topic has also been initiated to investigate the potential of material modifications with the goal to decrease overall precipitation in drainage pipes and associated maintenance. First results on modified materials already show potential to decrease calcite precipitation. x | |||||
Erharter, Georg H.; Marcher, Thomas; Reinhold, Chris | Application of artificial neural networks for Underground construction - Chances and challenges - Insights from the BBT exploratory tunnel Ahrental Pfons | Geomechanics and Tunnelling | 5/2019 | 472-477 | Topics |
KurzfassungThe interaction of tunnel boring machines with the rock mass is highly influenced by human, technical and geological factors. Interpretation of geological observations and TBM data is currently done on a subjective basis. Technologies based on Artificial Intelligence research, can be used to automatically classify TBM data into rock mass behaviour types. Albeit first results look promising, any technology poses the threat of malicious use that deliberately harms / benefits one or another party. x | |||||
Bakhshi, Mehdi; Nasri, Verya | New ACI 533 guide on general design and construction aspects of precast concrete tunnel segments | Geomechanics and Tunnelling | 5/2019 | 478-483 | Topics |
KurzfassungAmerican Concrete Institute (ACI) is aiming to publish its first guide (ACI 533.2R) on general aspects of precast tunnel segments. This paper presents salient features of the guide including the most recent developments on major aspects of design, manufacturing and construction. This document is drafted based on the knowledge and the experience gained on projects in Asia, Europe, and North America, and available national and international recommendations. Procedures to perform structural design during production, transportation, construction and final service stages are explained. Details of segmental ring geometry and systems, concrete strength, curing, and reinforcement detailing are discussed. Gasket design, segment connection devices, anchorage systems, tolerances, measurement and dimensional control, and repair of defects are among other topics that are covered. This document also addresses durability and degradation mechanisms of tunnel linings and their mitigation methods. While some parts of this guide may only consider the procedures adopted by ACI, they can be extended to other national and international codes and used worldwide. x | |||||
Meschke, Günther; Neu, Gerrit Emanuel; Marwan, Ahmed | Robust segmental lining design - Potentials of advanced numerical simulations for the design of TBM driven tunnels | Geomechanics and Tunnelling | 5/2019 | 484-490 | Topics |
KurzfassungLoading assumptions used for the structural design of segmental linings often improperly reflect the complex load combinations that develop during the construction of a bored tunnel. Therefore segment designs used in practice tend to be on the safe side and often rely on conventional reinforcement methods instead of including other reinforcement concepts, such as steel fibres. In this contribution, a multi-scale computational modelling framework is proposed to investigate the response of steel-fibre reinforced, traditionally reinforced, and hybrid-reinforced lining segments to radial loadings with an emphasis on the longitudinal joints. This modelling approach offers an opportunity to directly investigate the influence of type and content of steel fibres on the performance of segmented linings at the structural scale. Using this framework, a method for robust optimization is applied in order to generate damage-tolerant hybrid segment designs. x | |||||
Peila, Daniele; Martinelli, Daniele; Todaro, Carmine; Luciani, Andrea | Soil conditioning in EPB shield tunnelling - An overview of laboratory tests | Geomechanics and Tunnelling | 5/2019 | 491-498 | Topics |
KurzfassungThe application of full-face mechanized tunnelling, mainly with EPB shielded machines, has widely increased in the last years and today it can be considered the key technology when tunnelling in soils above and below the water table. The applicability range of EPB machines has widened thanks on one side to the technological and mechanical progresses and on the other side to the quality and effectiveness of the conditioning products. No recognized standards are available for laboratory testing of conditioned soil and each research centre has developed its own procedures and methods. In this paper, an overview of the most frequently used procedures is presented and discussed briefly. x | |||||
Ritter, Stefan; DeJong, Matthew; Giardina, Giorgia | Experimental evaluation of analytical methods to assess building response to tunnelling subsidence | Geomechanics and Tunnelling | 5/2019 | 499-504 | Topics |
KurzfassungThis paper evaluates the performance of currently available analytical procedures to assess building response to tunnelling-induced ground displacements. The focus is on methods that account for the interaction between the soil and the structure during tunnelling. These methods relate the soil to the building stiffness and are often called Relative Stiffness Methods (RSMs). Results from centrifuge model tests are used to evaluate the ability of these RSMs to predict building deformations. This evaluation benefits from detailed building models including facade openings, intermediate walls and strip footings. The range of RSM predictions was large, and the accuracy of each RSM was quantified. It was found that no RSM accurately predicts flexural building deformations. Recommendations that consider the building-to-tunnel position to achieve accurate predictions are indicated. This contribution provides a better understanding of the performance of currently available criteria to assess the risk of urban tunnelling. x | |||||
Rebhan, Matthias J.; Marte, Roman; Vorwagner, Alois; Tschuchnigg, Franz; Kwapisz, Maciej | Corrosion damage to cantilever MR walls - Representation in tests and calculations / Korrosionsschäden an Winkelstützmauern - Versuchstechnische und rechnerische Nachbildung | Geomechanics and Tunnelling | 5/2019 | 506-514 | Topics |
KurzfassungAfter the failure of a cantilever retaining wall with counterfort on the Brenner Autobahn, intensive investigation of existing structures showed considerable corrosion damage to cantilever walls with and without counterforts, at the location of construction and day joints. This is difficult to detect and assess due to the placing of the main reinforcement at the back of the construction. The present paper presents a monitoring concept, which enables detection of corrosion damage and also provides a gain of information about the behaviour of the structure. The basis for this concept is the installation of inclination and strain gauges on the front of a retaining wall. In order to explain the functioning of the concept, a rudimentary cantilever model of the effect of corrosion damage is first described. Then the results and findings from a test series with artificial corrosion representation to reinforced concrete structures to validate the presented monitoring concept is described. x | |||||
Nöhrer, Franz; Rebhan, Matthias J.; Saurug, Bernhard; Marte, Roman; Grubinger, Stefan S.; Mauerhofer, Gottfried | Long-term experiences for the safety Assessment of exisiting retaining structures in Styria / Risikomanagement bei Stützbauwerken im Streckennetz des Landes Steiermark | Geomechanics and Tunnelling | 5/2019 | 515-522 | Topics |
KurzfassungThe road network of the Austrian state of Styria, comprises of about 5,000 retaining structures along a total distance of about 5,100 km. In order to be able to carry out a useful and efficient inspection methode to this number of structures, a risk management (priority management) concept has been developed in collaboration with a university. This is based on the recording of significant parameters regarding the stability of these structures. In addition, the damage potential resulting from a failure of a structure is given, which enables an estimation of the associated risk. These documents can also be used as a design basis or for the determination of necessary inspection measures. The approach presented here is the first version of this concept for existing retaining structures in the state road network and is currently in a phase of trial and validation. x |