Artikeldatenbank
Autor(en) | Titel | Zeitschrift | Ausgabe | Seite | Rubrik |
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Berenbak, J.; Lanser, A. | The structural design of the "British Airways London Eye" (Zum Tragwerksentwurf des "British Airways London Eye") | Stahlbau | 4/2002 | 285-288 | Fachthemen |
KurzfassungWegen der sehr kurzen Lieferzeit mußte der Tragwerksentwurf des "British Airways London Eye", die Berechnungen, Fertigung, Zusammenbau und die Bauüberwachung, in eine schnelläufige Projektentwicklung eingefaßt werden. Des weiteren mußte die Dimension des Bauwerks dem schon bestellten Material, den möglichen Auflagergrößen, den Fertigungsmöglichkeiten sowie der Montagemethode angepaßt werden. Gegenstand dieses Beitrages sind die durchgeführten strukturmechanischen Untersuchungen. x | |||||
di Prisco, Marco; Martinelli, Paolo; Dozio, Daniele | The structural redistribution coefficient KRd: a numerical approach to its evaluation | Structural Concrete | 3/2016 | 390-407 | Technical Papers |
KurzfassungStructures made of a material with a very high standard deviation, such as fibre-reinforced concrete, exhibit an exceptionally safe prediction of the maximum bearing capacity when this is derived from characteristic values identified by means of small specimens. This is emphasized when the structures are characterized by high redundancy. In this regard, two reference tests representing two extreme situations are considered: a) simply supported unnotched full-scale beams characterized by a statically determinate loading scheme and b) full-scale slabs on the ground characterized by a statically indeterminate loading scheme. The Italian standard and, more recently, the fib Model Code for Concrete Structures 2010 have introduced a coefficient (structural redistribution factor) that is able to take into account the reduced variability of mechanical bearing capacity when associated with a large volume involved in the failure process and/or when the structure is able to redistribute stresses significantly, thus favouring the average rather than the minimum strength. A numerical procedure taking into account the expected heterogeneity of the mechanical characteristics in the structure is introduced for the first time to evaluate the redistribution factor. x | |||||
Camus, Thomas; Therville, Fabrice | The Sydney North West Rail Link project tunnelling challenge with four double shield TBMs | Geomechanics and Tunnelling | 5/2015 | 402-408 | Topics |
KurzfassungNFM Technologies has designed and delivered four 6.99 m-diameter Double Shield TBMs that are excavating the North West Rail Link project, an extension to the Sydney rapid transit network. The project is led by a consortium comprising Thiess, John Holland and Dragados, acting on behalf of the Government of New South Wales Transport Authority. Altogether, the TBMs will build 15 km of twin tunnels in rock that is mainly formed of abrasive sandstone. TBMs 1 and 2 bore the 9 km section between the Bella Vista and Cherrybrook stations, while the remaining 6 km from Cherrybrook to the Epping interchange are bored by TBMs 3 and 4. x | |||||
Weidinger, F.; Lauffer, H. | The Tauern tunnel first and second tubes from the contractor´s viewpoint / Tauerntunnel erste und zweite Röhre aus der Sicht des Bauausführenden | Geomechanics and Tunnelling | 1/2009 | 24-32 | Topics |
KurzfassungThe construction of the first tube of the Tauern tunnels in the years 1970 to 1975 was a milestone in the development of the NATM and of modern tunnelling. Completely new methods were introduced and used successfully to overcome the strongly squeezing rock, which was the only possibility of mastering the large rock deformations and completing tunnelling within the planned deadline. x | |||||
Herzog, Peter; Voringer, Jürgen; Kühner, Walter; Reiter, Franz; Lang, Georg | The Tauernmoos pumped-storage hydro power plant - Energy storage for the Austrian railway / Das ÖBB-Kraftwerk Tauernmoos - Energiespeicher für die Bahn | Geomechanics and Tunnelling | 5/2022 | 491-501 | Topics |
KurzfassungIn 2004, ÖBB-Infrastruktur AG started the first studies for the construction of a pumped-storage hydro power plant between the two largest reservoirs of the existing Stubach Valley power plant group in Salzburg's Pinzgau region. Two reversible pump-turbine units including a full converter with a total capacity of 170 MW and a maximum flow of 80 m3/s are planned. The construction of the 335 million. euro project started in 2020 and will be completed by autumn 2025. In addition to a 50,000 m3 cavern, an 11.5 km tunnel system including the access tunnels and the power water ways have been built. Most of the 11.5 km tunnel system is situated in stable gneiss. A greater challenge is the construction of the two inlet and outlet structures in the high mountain region during the winter season, when the lakes can be held on the lowest reservoir level. Since the remaining construction work is also carried out at an altitude of 1500 to 2250 m above sea level in alpine terrain, the construction company has been facing recurring problems such as snow, cold, wind, mudslides and the associated logistical difficulties. Despite these challenges, the excavation work was completed in summer 2022. The main focus is currently placed on the concrete works in the cavern, which is scheduled to be completed in autumn 2023. This will be followed by the installation of mechanical and electrical equipment as well as the control systems. x | |||||
Vardijan, Tomas; Pradel, Michael | The technical solution for working beneath the protected DB directorate building on the major Stuttgart 21 project / Darstellung der technischen Lösung zur Unterfahrung der denkmalgeschützten DB Direktion im Großprojekt Stuttgart 21 | Geomechanics and Tunnelling | 2/2017 | 194-203 | Topics |
KurzfassungBuilt in 1914, the listed Reichsbahn directorate building was formerly used as an administrative building by Deutsche Bahn AG in Stuttgart. The Stuttgart 21 Project requires new tracks from the Feuerbach and Bad Cannstatt Tunnels to be built, which branch off from 4 to 8 tracks in the area beneath the DB directorate. Complete demolition of the directorate building was not possible due to the objection of the listed monument authorities, the city administration, the municipal council of architects and the former building owner Vivico. In view of this the preservation of the main building was specified in the planning decision of 28/01/2005. x | |||||
Sauer, Christian | The Tender Model for Infrastructure Projects in the view of the employer Asfinag / Das Vergabemodell für Infrastrukturprojekte aus Sicht des Auftraggebers Asfinag | Geomechanics and Tunnelling | 6/2012 | 726-727 | Reports |
The Testing of Connections with Mechanical Fasteners in Steel Sheeting and Sections. | Steel Construction | 1/2010 | 18 | Book review | |
Kiesling, Andreas; Glösl, Harald; Nussbaumer, Alex | The third tunnel boring machine for the Koralm Tunnel / Die dritte Tunnelvortriebsmaschine für den Koralmtunnel | Geomechanics and Tunnelling | 6/2015 | 481-488 | Topics |
KurzfassungOn contract KAT3 of the Koralm Tunnel, a multi-mode tunnel boring machine with a diameter of 9,940 mm and an overall length of about 250 m will be used. The capability of the machine to be rebuilt from earth pressure to hard rock mode will enable it to bore through geologically different rock mass zones. It will be assembled in the launching excavation at Mitterpichling and at the west portal on the site facilities area, where the entire necessary infrastructure and segment production plant are situated. The particular geological challenges demand preliminary trials and special equipment on the tunnel boring machine. x | |||||
Walter, Herbert; Kitzler, Christian | The timeframe and continuity of measurement data acquisition - intention and reality / Zeitrahmen und Kontinuität von Messbeobachtungen - Wunsch und Wirklichkeit | Geomechanics and Tunnelling | 5/2011 | 381-392 | Topics |
KurzfassungThe value of geotechnical measurements for the evaluation and prediction of the effects of construction and repair measures as well as for the production of geotechnical and structural models in geotechnical and underground construction is indisputable. In practice, however, it sometimes turns out that the required statements cannot be derived from the available data with sufficient reliability. This article presents three examples of measurement programmes and discusses their strengths and weaknesses. One of the examples concerns a classic mined excavation in soft soil, another the measurement programme in a pivot tunnel for the estimation of swelling potential and the third the improvement of slope support measures while maintaining traffic. The importance of a timely start to measurement and a sufficiently high measurement frequency adapted to the results of the measurements and the progress of construction are demonstrated. A sufficiently long run of measurements after the completion of construction is also desirable. Various types of measurements and observations should be matched to each other and integrated. The results of laboratory tests, large-scale experiments and structural calculations - if available - should also be included in this integration. Continuity of measurements should be ensured, for example, by sufficient redundancy even if individual data are lost. Documentation should permit rapid interpretation of the overall situation. x | |||||
Dürr, Markus; Misiek, Thomas; Saal, Helmut | The torsional restraint of sandwich panels to resist the lateral torsional buckling of beams | Steel Construction | 4/2011 | 251-258 | Articles |
KurzfassungExperimental investigations and parametric finite element analyses show that the moment-rotation characteristic of sandwich panels providing support against the lateral torsional buckling of beams subjected to gravity loading can be represented as tri-linear. Formulae for calculating the parameters of this characteristic are given for different types of beam combined with sandwich panels for roofs and walls. According to available design codes, the torsional restraint coefficient for rotational stiffness cϑ required for design against lateral torsional buckling of beams is governed by the rotational stiffness cϑA of the connection, which can be obtained from the characteristic mentioned as the secant stiffness for all common types of sandwich panel and different types of structural arrangement. These values allow the maximum spans of beams to be increased and help to improve the economy of lightweight structures. x | |||||
Schuller, Erik; Galler, Robert; Barwart, Stefan; Wenighofer, Robert | The transparent face - development work to solve problems in mechanized hard rock tunnelling / Die gläserne Ortsbrust - Entwicklungsarbeiten zur Lösung von Fragestellungen rund um maschinelle Vortriebe im Festgestein | Geomechanics and Tunnelling | 3/2015 | 200-210 | Topics |
KurzfassungWhile image-based face documentation is well established in conventional tunnelling, even photogrammetric 3D reconstruction, this technical aid is not available in mechanized tunnelling. In a research project of the Chair of Subsurface Engineering with Geodata GmbH, work is underway to develop an imaging device, which is mounted in the cutterhead of a TBM and takes pictures during the maintenance shift that can be used for a photogrammetric reconstruction of the face. In the present article, the results of the first test images are presented. These were undertaken on a tunnel boring machine on the ÖBB project Koralm Tunnel KAT2 in agreement with the research initiative of the ÖBB-Infrastruktur AG. x | |||||
Karasek, Georg | The tunnel construction contract - A review / Der Tunnelbauvertrag - Eine Bestandsaufnahme | Geomechanics and Tunnelling | 6/2021 | 755-761 | Topics |
KurzfassungIn tunnel construction there is a clear need for specific contractual regulations, as unforeseen events make it far more difficult to predict the construction measures required than is the case in above-ground construction. Tunnel construction contracts must make provision for all such events associated with changes in performance to ensure conflict-free invoicing wherever possible. Conflict avoidance begins at the tender phase. In addition to the two ÖNorm B 2203 standards, the Guideline for the Geotechnical Design of Underground Structures with Conventional Excavation is an important basis for tunnelling contracts. Austrian standard ÖNorm B 2118 also plays a major role in tunnel construction as the agreed contractual basis in most cases. It contains contractual provisions for building services based on the partnership model and is intended for large-scale projects and complex construction works. In future, other alternative contract models with a partnership approach could become an even greater focus of attention. For instance, the alliancing contract model is particularly suitable for complex, technically challenging projects requiring innovative solutions. The early involvement of all key project participants is intended to reduce design errors and encourage innovation. x | |||||
Huymajer, Marco; Operta, Dzan; Mazak-Huemer, Alexandra; Huemer, Christian | The Tunneling Information Management System - A tool for documenting the tunneling process in NATM projects | Geomechanics and Tunnelling | 3/2022 | 259-264 | Topics |
KurzfassungThe documentation of the tunneling process is a crucial task of every tunnel construction project. It provides evidence of the work performed and thus, serves as a basis for invoicing and for several further analyses. Therefore, continuous digitalisation of this documentation is essential. For this purpose, we provide a digital Tunneling Information Management System (TIMS), which is a prototypically implemented software tool for replacing the still common paper-based documentation process of tunneling projects using the New Austrian Tunneling Method (NATM). The data model presented here defines the data structures managed by this tool. Based on this, the software architecture and the implementation of TIMS is shown. x | |||||
The Tunnelling Pocketbook 2009 / Taschenbuch für den Tunnelbau 2009 | Geomechanics and Tunnelling | 4/2009 | 405 | New publication | |
Dunjic, Viktor; Rudisch, Andreas; Kolbitsch, Andreas | The two-shearfield test - A suitable method for the empirical shear capacity design of masonry / Der Zweifeld-Schubversuch - Eine praxistaugliche Methode zur versuchsgestützten Bemessung der Schubtragfähigkeit von Bestandsmauerwerk | Mauerwerk | 5/2016 | 381-387 | Fachthemen |
KurzfassungThe investigations [1] demonstrate that the two-shearfield test is a suitable method for the determination of the shear capacity of masonry. The testing equipment is mounted directly on the wall in order to retain realistic boundary conditions like stiffness, load and prior damage. x | |||||
Sigl, Oskar; Millen, Bernard; Höfer-Öllinger, Giorgio | The underground crude oil storage caverns of Visakhapatnam, India | Geomechanics and Tunnelling | 2/2014 | 155-162 | Topics |
KurzfassungUnderground storage schemes are gaining importance in India, as all over the world. Such storage schemes involve the excavation of large underground caverns, connecting tunnels and various types of shafts. This example provides storage for more than 1.3 mill. metric tons of crude oil stored in unlined caverns 20 m wide, 30 m high and up to 820 m long. The scheme also includes three 110 m deep product intake shafts, two 90 m deep product extraction shafts and about 2,600 m of tunnels. The total volume, excavated by drill and blast method, is about 2 mill. m3 and rock support is provided by post-grouted rock bolts and steel fibre reinforced shotcrete. The product is confined on the principle of a groundwater curtain system, essentially employing ground water pressure gradients to contain the crude oil within the unlined rock cavern complex. Excavation works on the project commenced in the middle of 2008 and, after some delays, were finally completed in February 2014. This paper focuses on the risk management practices employed for this project. The paper “Rock mass behaviour of weathered, jointed and faulted Khondalite - Examples from the underground crude oil storage caverns, Visakhapatnam, India” by Sigl, Millen and Höfer-Öllinger that refers to the actual situation will be published in issue 3-2014 of Geomechanics and Tunnelling. x | |||||
Gooderham, Maurice A. W.; Hindle, David J. | The use of NATM in the UK from 1970 to date / Der Einsatz der NÖT im Vereinigten Königreich seit 1970 | Geomechanics and Tunnelling | 5/2012 | 420-430 | Topics |
KurzfassungNATM was not introduced into the UK until 1985, despite the British tunnelling industry's long and distinguished history of numerous pioneering achievements in underground technology. The first application was for a mine access tunnel in rock and was soon followed in the early 1990s by soft ground NATM projects in London, which exhibits similar ground conditions to Frankfurt where this adaptation of the method was first tried out over 20-years previously. Following a very promising start NATM faced a serious setback in 1994 with the major collapse during construction of the Heathrow Airport's Central Terminal Area underground station and all NATM work on this and the other major project underway at the time, the Jubilee Line Extension, was suspended. The incident triggered criminal prosecutions and an enquiry by the UK's Health & Safety Executive, which eventually led to a complete re-evaluation of the method in the UK, resulting in recommendations and guidelines for the re-designated Sprayed Concrete Lining or SCL method published by the Institution of Civil Engineers and British Tunnelling Society in 1996. Since that time all sprayed concrete lined tunnelling in the UK, whether in soft ground or rock have been designed and constructed to the SCL methodology, culminating in the massive Crossrail project that is currently under construction in London. This paper reviews the history, development and future of NATM and SCL in the UK and illustrates these by reference to the key projects where the methods have been employed and are planned for the future. x | |||||
Gollegger, J.; Priller, A.; Rausch, M. | The use of open tunnel boring machines in squeezing rock in the Gotthard Base Tunnel / Einsatz von offenen Tunnelbohrmaschinen bei druckhaftem Gebirge im Gotthard Basistunnel | Geomechanics and Tunnelling | 5/2009 | 591-600 | Topics |
KurzfassungIn the Faido section of the Gotthard Base Tunnel (GBT), two open gripper tunnel boring machines (TBM) with a bored diameter of 9.4 m are each driving about 11 km of single-track tunnel. No extensive fault zones were expected in the entire section except for the Piora-Mulde. A special tunnel was driven to investigate the Piora-Mulde, from which investigation boreholes were drilled down to tunnel level. Because of the finding of sugar-grain dolomite, the tunnelling work was tendered by drilling and blasting as well as mechanically, but the tenders led to the award being based on TBM tunnelling. x | |||||
Bach, Dietmar; Holzer, Wolfgang; Leitner, Wolfgang; Radoni , Nedim | The use of TBM process data as a normative basis of the contractual advance classification for TBM advances in hard rock / Die Verwendung von Maschinenparametern und Betriebsdaten als normative Grundlage für die vertragliche Vortriebsklassifizierung für Tunnelvortriebsmaschinen im Festgestein | Geomechanics and Tunnelling | 5/2018 | 505-518 | Topics |
KurzfassungIn April 2016 a newly formed working group began with the revision of the Austrian standard ÖNORM B 2203-2. The goal of the group was the establishment of a practicable advance classification scheme, which would be applicable both for the design and for the construction phase. In addition, a clear separation should be established between a regular advance, which is clearly described and can be calculated by the bidding contractor, and a “hindered advance”, which cannot clearly be described and calculated. The contractual framework is used to compensate for the regular advance, and hindering occurrences such as water ingress or increased wear are compensated by additional contractual time-dependent costs. Fair compensation regulations for hindered advance (such as an advance through blocky rock mass, mixed face conditions, swelling, squeezing ground, major face instabilities, increased adhesion and stickiness of muck, obstacles and suspension losses) are to be defined as well. The method presented in this paper and based on systematic TBM data evaluation achieves both the goal of contractual advance classification and the goal of establishing a simple threshold differentiating regular advance and hindered advance. x | |||||
Pollard, R.; Jones, W.; Whitfield, J. | The use of transient pressure analysis at the Dounreay Shaft Isolation Project / Die Verwendung der Analyse instationärer Druckentwicklung am Dounreay Schachtabdichtungsprojekt | Geomechanics and Tunnelling | 5/2009 | 469-482 | Topics |
KurzfassungThis paper provides an assessment of the use of pressure fall-off data during the Dounreay Shaft Isolation Project. The instrumentation controlling the injection of grout monitors and records both the pressure and the flow rate throughout the process, so pressure fall-off data is collected during any pauses to, and at the end of, each grout injection. The shapes of the pressure fall-off vs time curves have been examined qualitatively and categorised. The fall-off data has also been examined using PanSystem well test software, which creates the pressure change and pressure derivative curves, then attempts to simulate the fall-off curve by iteration after selection of a flow and boundary model chosen from the wide range available. The implications that the shapes of the pressure and derivative curves and the flow and boundary models have for the grout curtain have been examined. The caveats that surround the quantitative use of results from Pan-System analyses for a cement grout rather than a Newtonian fluid are discussed. x | |||||
Bopp, R.; Neumann, C.; Langner, V.; Wagner, O. K. | The ventilation and tunnel safety concept for the New Semmering Base Tunnel / Das Lüftungs- und Sicherheitskonzept für den Semmering-Basistunnel neu | Geomechanics and Tunnelling | 2/2010 | 143-153 | Topics |
KurzfassungFor the conception of the emergency ventilation and the design of the ventilation system for the New Semmering Base Tunnel, particular demands apply, which are based on specific protection objectives and defined in the Tunnel Safety Concept. The main objective is to keep the safe areas (the refuge room at the emergency station, opposite tube, portals) free of smoke. This paper deals with the Safety Concept and the tunnel ventilation. A methodical approach was applied to prevent single critical scenarios being weighted too heavily in the design of the ventilation equipment. This achieved an optimisation of the entire system instead of designing the ventilation system for isolated extreme scenarios. x | |||||
Espion, Bernard | The Vierendeel bridges over the Albert Canal, Belgium - their significance in the story of brittle failures | Steel Construction | 4/2012 | 238-243 | Reports |
KurzfassungBetween 1933 and 1938, some 50 Vierendeel-type welded road bridges were erected in Belgium to provide crossings over the Albert Canal or the Campine canals. They were the first significant applications of electric arc welding in Belgium and constitute the majority of the large welded bridges built at that time in Belgium. It was the heyday of the Vierendeel bridge, which had been invented in 1895 but which had found only limited applications before 1930, with less than 40 built in Belgium and Congo in 30 years. But this rapid application of welding to structural steelwork encountered many problems that were probably overlooked in the climate of euphoria surrounding bridge-building. In March 1938 the Hasselt Bridge suffered a brittle failure. This is generally regarded as the first brittle failure of a large all-welded structure and received much attention at that time. But in 1940 at least three other bridges of this series were also badly fractured and there are indications that some others also experienced serious cracking problems. This paper places theses accidents in perspective in the long story of brittle failures. x | |||||
Horden, R. | The Wing Tower (Der "Wing Tower") | Stahlbau | 6/2000 | 466-468 | Fachthemen |
KurzfassungEs wird über die Realisierung des Entwurfes von 1991 für den internationalen Wettbewerb "Tower for Glasgow" im Zusammenhang mit dem Imax und dem Exploratorium als Teil des neuen schottischen Wissenschaftszentrums bei Pacific Quay berichtet. Zur Zeit ist die erste Variante des Wing Towers auf dem River Clyde Gelände im Bau; das Bauwerk soll bis April 2001 vollendet sein. Es handelt sich um ein einzigartiges Bauprojekt - bisher wurden nur wenige adaptive Tragsysteme realisiert. x | |||||
Hertle, R.; Völkel, G. | The Work at CEN/TC 53 Regarding Working Scaffolds (Arbeitsgerüste für Europa, eine Momentaufnahme der Normungsarbeit bei CEN/TC 53). | Stahlbau | 9/1990 | 275-282 | Fachthemen |
KurzfassungEs werden Informationen über den aktuellen Stand der Normungsarbeit für den Gerüstbereich im CEN/TC 53 gegeben. Die wesentlichen Unterschiede zwischen den französischen und den deutschen Nachweisverfahren für vorgefertigte Systemgerüste werden zusammengestellt. An einem Beispiel werden die Auswirkungen gezeigt. x |