Artikeldatenbank
Autor(en) | Titel | Zeitschrift | Ausgabe | Seite | Rubrik |
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Austrian Tunnel Day | Geomechanics and Tunnelling | 6/2018 | Cover Pictures | ||
KurzfassungIn the Frasers underground gold mine in New Zealand several previously mined areas had to be sealed off and secured against water ingress. To ensure that the bulkhead structures are effective, the surrounding highly fractured rock masse had to be reinforced. In cooperation with Mastermyne, DSI Underground Australia suggested pumping Mineral Bond urea silicate resin into the rock mass around the drive to consolidate the ground and eliminate the water passage around the bulkhead seal sites. Mineral Bond was chosen as it is a nonexpanding resin which is unaffected by water, remains flexible and develops a strength of 40 MPa (see page 738). x | |||||
Content: Geomechanics and Tunnelling 6/2018 | Geomechanics and Tunnelling | 6/2018 | Contents | ||
Galler, Robert | 11th Austrian Tunnel Day / 11. Österreichischer Tunneltag | Geomechanics and Tunnelling | 6/2018 | 618 | Editorials |
News: Geomechanics and Tunnelling 6/2018 | Geomechanics and Tunnelling | 6/2018 | 619-631 | News | |
KurzfassungDouble breakthrough on the Follo Line - Doppel-Durchbruch bei der Follo Line x | |||||
Schweiger, Helmut F. | Thomas Marcher new head of the Institute of Rock Mechanics and Tunnelling of the Graz University of Technology - Thomas Marcher neuer Leiter des Instituts für Felsmechanik und Tunnelbau an der TU Graz | Geomechanics and Tunnelling | 6/2018 | 632 | Peoples |
Joham, Kurt | From conventional to mechanised tunnelling - A technical and operational challenge / Vom konventionellen zum maschinellen Vortrieb - Eine technische und baubetriebliche Herausforderung | Geomechanics and Tunnelling | 6/2018 | 636-646 | Topics |
KurzfassungThe article provides a summarised report about the redesign of the 8, 822 m long Boßler Tunnel from the originally intended shotcrete method to a mechanically driven tunnel. The twin-bore Boßler Tunnel is the main contract on the Albaufstieg (Alb ascent) section of the new DB line from Wendlingen to Ulm as part of the major DB project Stuttgart-Ulm. In 2012, the tunnel was tendered by the DB AG for construction by conventional methods with shotcrete support, but a bid for the Boßler Tunnel was received from the consortium Porr, Hinteregger, Östu/Stettin and Swietelsky with an alternative proposal to drive a 2,900 m long section of the tunnel with a machine. The contract was awarded with the alternative proposal and during the construction of the Boßler Tunnel, a change was then made to complete mechanised tunnelling in a unique technical and operational process. The report provides an insight into the challenges of a change to the overall construction system, undertaken after the award during the construction period, for the driving of altogether 17,500 m of tunnel bores. Construction operations, logistics, design for construction, additional investigation measures and contractual parameters were reorganised and redesigned on a tight schedule. Starting with the original 5,800 m TBM drive and the start of tunnelling in April 2015, the entire Boßler Tunnel was actually constructed as a mechanically driven single-pass tunnel by June 2018. x | |||||
Wunderle, Maximilian; Abele, Matthias | Geotechnical challenges during the construction of the Albabstieg Tunnel in prediction and construction / Geotechnische Herausforderungen beim Bau des Tunnel Albabstieg in Prognose und Ausführung | Geomechanics and Tunnelling | 6/2018 | 647-658 | Topics |
KurzfassungThe construction of the Albabstieg Tunnel on the Wendlingen-Ulm railway line had to overcome several geotechnical challenges. For the filling of the ground replacement body as a foundation for the slab track from recycled tunnel excavation material, it turned out that the Jurassic limestones are only conditionally suitable as a qualified fill material. The aggregates processed on site can only be used as fill material if cement stabilised. Beside the main issue of karst investigation, above ground by means of geophysical methods and underground using a conventional drilling grid, two longer sections of pipe screens had to be constructed: in the area of an unsealed landfill intersected by the tunnel cross-section and in the area of shallow overburden in the Lehrer Tal. Tunnelling under a residential area with historic cellars had to be accompanied by an intensive monitoring of blasting due to highly variable rock strength. Low-emission tunnelling could only be achieved with additional measures of blasting optimization. With the interdisciplinary co-operation between client, geotechnical consultant, designer and contractor, these special challenges were successfully overcome and the construction works were completed within cost and schedule. x | |||||
Halwachs, Michael | Guidelines for health and safety and fire safety on underground construction sites / Richtlinien für Sicherheit, Gesundheitsschutz und Brandschutz auf Untertagebaustellen | Geomechanics and Tunnelling | 6/2018 | 659-665 | Topics |
KurzfassungUnderground construction sites represent a complex challenge for all project participants. Precisely in the area of health and safety as well as fire safety, therefore, good coordination is necessary in order to successfully counteract the increased accident and health risks. Clear definition of tasks and responsibilities is therefore essential. Through a continuous risk management process, it is possible to ensure from the design phase to the construction phase that risks can be minimized in advance and that the best risk reduction measures can be derived. The Guideline and Regulation for the Planning, Construction and Maintenance of Roadways (RVS) 09.01.51 “Health and Safety on underground construction sites” provides the necessary basis for this and thus represents an essential tool for all project participants to improve the level of safety. x | |||||
Leitner, Andreas; Goger, Gerald | Revision of the Austrian Standard ON B 2203-1 for work contracts in conventional tunnelling (NATM) / Update der österreichischen Werkvertragsnorm ÖNORM B 2203-1 für den zyklischen Vortrieb | Geomechanics and Tunnelling | 6/2018 | 666-679 | Topics |
KurzfassungThe works contract for cyclic driving ÖNORM B 2203-1 has made a significant contribution to the successful completion of numerous tunnel construction projects in the last four decades. As part of a required update in the industry, no reason was seen to change the set of rules of the present classification system and the essential principles of the existing standard. The focus of the revision has therefore been - on the basis of the experience of the last decades in the implementation of tunnelling projects - on the one hand in the analysis and rating of support elements and additional measures and on the other hand in the provisions of the standard for water implications. Through these updates, in good old tunnel construction tradition, cooperative project management on a high constructional level will continue to be ensured. x | |||||
Spiegl, Markus; Galler, Robert; Sander, Philip | Application of the ÖGG guideline for cost estimates on international megaprojects / Kostenermittlung für internationale Großprojekte auf Basis der ÖGG-Richtlinie | Geomechanics and Tunnelling | 6/2018 | 680-692 | Topics |
KurzfassungTransportation infrastructure projects are characterised by long project phases, a high number of project participants, hard-to-predict influences and their uniqueness. The new version of the ÖGG “Guideline for the Cost Determination for Transportation Infrastructure Projects” builds on experience of the previous version and sets new accents in practical applicability, e.g. through the use of risk fact sheets. Structured cost and risk management is no longer conceivable without adequate software. The integral cost and schedule analysis is a further step towards improved cost and project schedule stability. The guideline was published in English at the same time, which supports its use in international consulting. x | |||||
Buyer, Andreas; Pischinger, Gerald; Schubert, Wulf | Image-based discontinuity identification / Bildgestützte Trennflächenidentifikation | Geomechanics and Tunnelling | 6/2018 | 693-700 | Topics |
KurzfassungKnowledge about the joint network is important in rock engineering. It controls the stability and strength of blocky rock masses. Thus, the joint network is mapped in more or less detail, regarding the specifications. To do so, different methods have evolved over the years. One of these methods is digital mapping, based on the visual and spatial appearance of the distinct joints. This mapping usually is done by an experienced geologist. However, the trend in digital mapping is towards a supervised but mainly autonomous identification of discontinuities. One aspect of this automated process is the recognition of joints in digital outcrop images by their optical attributes. This contribution presents a density based joint plane detection. By the combination of a vector based joint plane detection and a pixel based joint trace detection, not only joints, but also the foliation in the investigated tunnel face could be extracted very accurately. The approach represents the current state of research and further improvements are to be expected. x | |||||
Monsberger, Christoph M.; Lienhart, Werner; Moritz, Bernd | In-situ assessment of strain behaviour inside tunnel linings using distributed fibre optic sensors / Beurteilung des In-situ-Dehnungsverhaltens der Tunnelschale mittels verteilter faseroptischer Messsysteme | Geomechanics and Tunnelling | 6/2018 | 701-709 | Topics |
KurzfassungIn modern tunnelling, deformation monitoring is an important component to ensure a safe construction. It is state of the art to measure displacements at the inner side of the tunnel lining using total stations. In addition, pointwise geotechnical sensors, e.g. electric strain gauges, may be installed in geological fault zones, which, however, do not deliver a complete picture of the internal deformations. The Institute of Engineering Geodesy and Measurement Systems (Graz University of Technology) supported by the Austrian Federal Railways (ÖBB-Infrastruktur AG, SAE Fachbereich Bautechnik/Tunnelbau) developed a fibre optic sensing system, which realizes thousands of measurement points inside the tunnel lining. The distributed measurements can be used to assess the in-situ strain behaviour as well as to localize failures (e.g. cracks) in the lining. This paper reports about the calibration of the fibre optic system under well-known laboratory conditions and the practical utilization of the system in mechanized and conventional tunnelling. The results demonstrate the high potential of distributed fibre optic systems and their capability especially in the operational phase to extend classical measurement methods in tunnelling projects. x | |||||
Goger, Gerald; Bisenberger, Tobias | Tunnelling 4.0 - Construction-related future trends / Tunnelbau 4.0 - Baubetriebliche Zukunftstrends | Geomechanics and Tunnelling | 6/2018 | 710-721 | Topics |
KurzfassungThe digitalisation of construction-related processes will increasingly penetrate the individual development phases of tunnel construction projects (design, construction and operation). The digital transformation will affect all tunnelling processes through its four key levers: “digital data, automation, networks and digital access”. Topics such as Industry 4.0, digital twins, Building Information Modelling or Lean Management will lead to a rethink in the construction industry. The constant use of data sources and the storage of data in independent databases is already possible. This makes it possible for the project participants to analyse collected construction-related data, to process it and to make it available through an online portal. This results in the possibility to evaluate, optimize and document construction processes on a well-founded data base. Complex construction management systems will be described with digital models, and the use of digital knowledge systems will support the decision-making process for stakeholders. The fundamental philosophy of the New Austrian Tunnelling Method should not be called into question by standardised calculation algorithms and tunnelling software. In this contribution, visionary future trends are outlined for cyclical and continuous tunnelling methods, which should stimulate a controversial discussion. x | |||||
Füllenbach, Christel | Smarter Tunnelling / Smarter Tunnelling | Geomechanics and Tunnelling | 6/2018 | 722-728 | Topics |
KurzfassungSafety, time and costs belong to the most important influencing factors in tunnelling. The Smarter Tunnelling concept can positively influence these factors by speeding up work processes, avoiding limited safety zones and saving time and money. Smarter tunnelling not only describes the use of machines that are remotely monitored, but also the integration of an entire intelligent system into a tunnelling project. For this purpose, all machines used have to communicate with each other and with a central data processing unit. To implement this digitization and automation in tunnelling projects, networking with intelligent sensors and actuators as well as special software are used. In order to achieve a trimming of work processes at the same time, it is necessary to streamline data processing through IT solutions. This paper presents the Epiroc solutions, which have been specially developed for the tunnel construction sector. x | |||||
Wehrmeyer, Gerhard | Development trends in mechanised tunnelling / Entwicklungstendenzen im maschinellen Tunnelbau | Geomechanics and Tunnelling | 6/2018 | 730-737 | Topics |
KurzfassungThis article reports on the development of tunnel boring machines (TBMs) in the past decades and the current state of the art. The development is presented with a look back and a look forward into the near future. Starting with the questions on the development of diameter and operating pressure of closed tunnelling machines, the perspective is expanded to general developments and current trends in machine technology for soft ground and hard rock. Finally, the possibilities and potentials arising from environmental requirements, further increases in performance and digitalization in mechanized tunnelling are shown. x | |||||
Safe underground sealing with Mineral Bond silicate resin supplied from DSI Underground - Sichere Abdichtung unter Tage mit Mineral Bond Silikatharz von DSI Underground | Geomechanics and Tunnelling | 6/2018 | 738-739 | Site Report | |
International Geomechanics and Tunnelling experts met in Salzburg - Internationale Geomechanik- und Tunnelbaukompetenz traf sich in Salzburg | Geomechanics and Tunnelling | 6/2018 | 739-741 | Conference Report | |
Fire protection boards in the Vorarlberg tunnel construction are being fastened with screw anchors - Schraubanker fixieren Brandschutzplatten in Vorarlberger Tunnelbauwerk | Geomechanics and Tunnelling | 6/2018 | 741-744 | Product Information | |
Diary of Events: Geomechanics and Tunnelling 6/2018 | Geomechanics and Tunnelling | 6/2018 | 744-745 | Diary of Events | |
Imprint: Geomechanics and Tunnelling 6/2018 | Geomechanics and Tunnelling | 6/2018 | 747 | Imprint | |
Titelbild: Mauerwerk 6/2018 | Mauerwerk | 6/2018 | Titelbild | ||
KurzfassungEgodom residential complex: The area was formerly dominated by workshops and garages - today two formidable apartment towers overlook it. The architect Sergey Skuratov with his team has implemented the “Egodom” residential complex northeast of Moscow. High window fronts, which extend over two storeys, dominate the building. Facades of clinker bricks take up the appearance of the historic buildings in the surroundings and give the two towers a powerful but simultaneously modern expression. (photo: Sergey Skuratov Architects) x | |||||
Inhalt: Mauerwerk 6/2018 | Mauerwerk | 6/2018 | Inhalt | ||
Meyer, Udo | Masonry in all its diversity / Mauerwerk in ganzer Vielfalt | Mauerwerk | 6/2018 | 341 | Editorials |
Rumplmayr, Simon; Thienel, Karl-Christian; Eden, Wolfgang; Burtscher, Wolfgang | Investigation of properties influencing the impact resistance of calcium silicate masonry units / Untersuchungen von Einflüssen auf den Beschusswiderstand von Kalksandstein | Mauerwerk | 6/2018 | 342-348 | Fachthemen |
KurzfassungCalcium silicate masonry is characterized by a high loadbearing capacity. Despite the widespread use of calcium silicate masonry units as a building material in Germany, there have been no studies to specifically improve its resistance to bullet impact, which would result in a new, very specialized market segment for threatened infrastructure. Within the scope of a research project, fundamental knowledge was gained about the influence of manufacturing parameters on the impact resistance of calcium silicate masonry units. The investigations showed that both the type and proportion of coarse aggregate and the forming pressure play a decisive role. Based on these findings, calcium silicate masonry units can now be specifically optimized with regard to high impact resistance. x | |||||
Kranzler, Thomas; Hannig, Antje; Meyer, Udo | New VDPM leaflet "Mauerwerk mit Dünnbettmörtel" / Neues VDPM-Merkblatt "Mauerwerk mit Dünnbettmörtel" | Mauerwerk | 6/2018 | 356-362 | Berichte |
KurzfassungThe German associations Verband für Dämmsysteme, Putz und Mörtel (VDPM), Arbeitsgemeinschaft Mauerziegel and Bundesverband Leichtbeton have published a new leaflet “Mauerwerk mit Dünnbettmörtel” [Masonry with thin-layer mortar] [1]. This compact guide offers 8 pages of helpful tips and important information concerning the application of thin-layer mortar with high-precision masonry units or high-precision blocks of lightweight concrete or clay. The leaflet contains terms and definitions, requirements for the thin-layer mortar, the units and the masonry and the different forms of delivery of thin-layer mortar. The main parts of the leaflet are the explanations of laying (levelling layer, blocklaying with thin-layer mortar, working time, methods of application, head joints...). Notes regarding occupational health and safety protection complete the leaflet. The following article describes the essential content of the leaflet with further information. x |