Journal articles
Author(s) | Title | Journal | Issue | Page | Category |
---|---|---|---|---|---|
Chance gegen den Fachkräftemangel | Bautechnik | 6/2011 | 361 | Bautechnik aktuell | |
Honeger, Christian; Engelbogen, Siegfried; Pucher, Michael | Challenges with regard to road tunnel structures - Assement management by Asfinag / Herausforderungen bei Tunnelanlagen - Asset Management der Asfinag | Geomechanics and Tunnelling | 5/2017 | 507-515 | Topics |
AbstractAsfinag (Autobahnen- und Schnellstraßen-Finanzierungs AG) has the commission to oversee the entire Austrian high-speed road network. Tunnel safety is an important focus. In the period between 2004, when the tunnel improvement programme started, and the first months of 2019, about EUR 5.7 billion will have been invested in the upgrading of tunnels as well as the optimisation of tunnel safety equipment. Along with these investments, there is also a focus on optimising the performance of lifecycles without risking non-compliance with safety standards. Tunnel refurbishment measures are planned and carried out on the basis of regular checks and assessments, taking into consideration requirements with regard to both construction engineering and electrical equipment while at the same time pursuing the aim of optimising cost-effectiveness. This paper also addresses the challenges resulting from the fact that the lifecycle of the tunnel structure differs from that of the tunnel equipment. Both the medium-term and the long-term planning of refurbishment measures should be prepared in detail to the greatest extent possible, so that the organisation can best guarantee both safety and cost-effectiveness. x | |||||
Jensen, Jakob Laigaard; Lambertsen, Jens; Zinck, Morten; Stefansson, Einar | Challenges of water ingress into bridge cable systems | Steel Construction | 3/2017 | 200-206 | Articles |
AbstractExperience with the operation and maintenance of cable-borne bridges of various ages over the last 20 years shows that water ingress into steel cable systems often occurs and causes a high risk of serious corrosion that may lead to traffic restrictions, extraordinary inspection and maintenance costs and, in the worst case, bridge closures. Examples of such experience cover suspension bridges as well as cable-stayed bridges in the USA, UK, Germany, France, Argentina, Sweden, Norway, Denmark and many other countries. The problem of water ingress is particularly critical as inspections for corrosion in cable systems are difficult to carry out and early warnings difficult to obtain. x | |||||
Dalios, Christos; Hilgenberg, Tobias | Challenges in shaft logistics in mining and tunnelling / Herausforderungen in der Schachtlogistik im Berg- und Tunnelbau | Geomechanics and Tunnelling | 5/2013 | 569-573 | Topics |
AbstractThe article deals with the logistic challenge of supplying large quantities of construction materials underground. In this regard, the necessity and problems, which led to the development of introduction of pneumatic and hydraulic conveyance systems for construction materials in German coal mining, are described. Additionally, the various intermediate stages of development are described up to the techniques used today. The advantages and disadvantages of pneumatic conveyance of dry materials and hydraulic conveyance are described. The technology in use today is the result of a history of research and development over more than 40 years and above all the demands of the mining industry. The material is distributed below ground through a network of pipelines and intermediate stations. The various galleries and bottoms can be reached through pipe switches. The control and operation of the above-ground system, the intermediate stations and the pipe switches is automatic and unmanned. The entire construction material supply network is controlled and monitored by the OPC server situated above ground. The data can easily be forwarded to downstream monitoring positions or connected for remote maintenance which is common practice today. x | |||||
Challenges in international tunnel consulting / Herausforderungen im internationalen Tunnel Consulting | Geomechanics and Tunnelling | 2/2014 | 112-113 | Interview | |
Kitiyodom, Pastsakorn; Wiriyatharakij, Woraphon; Asanprakit, Auttakit; Yamchoo, Anucha | Challenges in design and construction of Bangkok MRT Orange Line project | Geomechanics and Tunnelling | 3/2023 | 263-271 | Topics |
AbstractThe MRT Orange Line construction works in Bangkok are more complicated than works in earlier projects. As the tunnel alignment passes through the congested urban areas in the city, it either clashes with or passes beneath several existing structures. Underpinning works are then required. Assessment of movement of ground and structure plays an important role in the project. The rebound of piezometric pressure in sand layers that is being developed poses a major point of difficulty in the excavation and underground structure design and construction. Groundwater control measures become a crucial issue in MRT Orange Line project that leads to difficulties in deep MRT station excavations. To control base instability, various methods (e.g., cut-off wall, staged excavation) are introduced and presented in this article. x | |||||
Challenges for Concrete in the Next Millennium (D. Stoelhorst, G. P. L. den Boer (Hrsg.)) | Beton- und Stahlbetonbau | 4/1999 | 202-203 | Bücher | |
Clark, Gordon | Challenges for concrete in tall buildings | Structural Concrete | 4/2014 | 448-453 | Technical Papers |
AbstractTall buildings present unique challenges in terms of both design and construction. The definition of tall is always a matter for debate and actually is related to the proportions of the building, although the actual physical height does also result in other influences such as extreme lateral loading. x | |||||
ibert, Marko; Lah, Martin; Saje, Samo | Challenges and opportunities in implementing BIM methodology in tunnelling | Geomechanics and Tunnelling | 4/2018 | 335-339 | Topics |
AbstractTunnelling differs fundamentally from mining, high rise buildings and civil surface construction in many ways, but when it comes to challenges, it combines the toughest from the three worlds. Tunnelling projects inherit uncertainties of ground conditions and constant preparedness for on-site changes from mining; complexity, dynamics and the need for detailing from buildings; and one of the challenges that tunnels inherit from civil surface construction is definitely the complex and curved geometry. To overcome the challenges and exploit the benefits of BIM methodology on tunnelling project it is essential to harmonize particles of existing standards, guidelines, processes and tools from the three worlds. x | |||||
Zieger, Thomas; Bühler, Martin; Rick, Beat; Schmid, Werner; Grossauer, Karl | Challenges and innovative solutions at the new construction of the Bözberg Tunnel / Herausforderungen und innovative Lösungen beim Neubau des Bözbergtunnels | Geomechanics and Tunnelling | 1/2018 | 62-75 | Topics |
AbstractIn order to further increase the transfer of transalpine traffic through Switzerland from road to rail, the Gotthard axis is to be improved to a 4 m corridor. For this purpose altogether 270 km of railway line between Basel and the Italian border is to be improved to a corner height of 4 m by 2020. The largest individual structure is the new Bözberg Tunnel in the canton Aargau. Various options were investigated for the preliminary design. The best variant turned out to be the new construction of a two-track tunnel parallel to the existing tunnel. The existing two-track Bözberg Tunnel, which is not suitable for upgrading to the 4 m standard, will be used as a service and escape tunnel. Various emergency exits lead through five cross passages from the new to the old tunnel. The short construction time of five years until opening on the one hand, and the challenging geology in the Faltenjura with swelling rock mass on the other pose great problems for client, designers, and the contractor. This article reports on these challenges and describes how they have also led to innovative solutions. x | |||||
Diernhofer, Florian; Schneider, Klaus; Steiner, Helmut | Challenge of maintaining the Koralm Tunnel - Balancing operational availability and increasing railway equipment / Herausforderung Instandhaltung Koralmtunnel im Spannungsfeld betrieblicher Verfügbarkeit und Anlagenmehrung | Geomechanics and Tunnelling | 6/2019 | 652-660 | Topics |
AbstractThe Koralm Tunnel (length 33 km) crossing the eastern Alps is part of the Koralmbahn line and one of the longest rail tunnels in the world. The installation of railway equipment in the tunnel is due to start soon and it is particularly important to now make current decisions considerung future developments and demands. In particular the conflicting goals of the scheduling horizon of the construction permit process nearly 20 years ago, the 150-year design horizon and the rapid development of electronics, data processing and telematics have to be considered. Experience of operation of long rail tunnels confirms that despite all logistical efforts, the maintenance of railway equipment leads to a great expense of time and finance and also to restrictions of the line availability for operations. x | |||||
Galler, R. | Chair of Subsurface Engineering, University of Leoben, Austria | Geomechanik und Tunnelbau | 2/2008 | 156-157 | Forschung und Entwicklung |
Cesar Pelli. Recent Themes (Crosbie, M.) | Beton- und Stahlbetonbau | 6/1999 | 275 | Bücher | |
Hauzinger, Elisabeth; Galler, Robert; Schneider, Daniel; Benedikt, Michael; Ulrici, Luisa; Gutleber, Johannes; Charitos, Panagiotis | CERN Future Circular Collider - The Mining the Future competition / CERN-FCC Future Circular Collider - Der Wettbewerb Mining the Future | Geomechanics and Tunnelling | 6/2022 | 774-782 | Topics |
AbstractCERN (Conseil Européen pour la Recherche Nucléaire) is the world's largest research centre for high-energy and particle physics. The research infrastructure contributed to the greatest successes in the field of experimental physics. A new, approximatively 91 km long subsurface infrastructure connected to the existing particle accelerator complex is being conceived in the frame of the Future Circular Collider. It would serve a global community of researchers with two subsequently operated particle colliders until the end of the 21st century. Even at an early stage of such a project, comprehensive investigations have to be carried out into the nature of the subsoil in order to find an optimal utilisation strategy for the excavated material in accordance with the national and international regulations in order to promote the recycling of excavated tunnel material in terms of resource conservation and the improvement of the sustainability of underground construction projects. x | |||||
ceramitec 2003 | Bautechnik | 6/2003 | 407 | Termine | |
cepezed to design Utrecht city centre bridge | Steel Construction | 2/2009 | 108 | News | |
Groll, Franz; Wolf, Klaus | Centre Catholique de Formation et de Production à Léogâne (CCFPL) - République d'Haïti | Bautechnik | 6/2012 | 369-375 | Berichte |
AbstractBei dem Erdbeben in Haiti im Januar 2010 kamen rund 316 000 Menschen ums Leben, weitere 310 000 Personen wurden verletzt und geschätzte 1,85 Millionen Menschen wurden obdachlos. Nach Einschätzungen der Regierung wurden ca. 250 000 Wohnungen und 30 000 Geschäfte zerstört. Der nachfolgende Bericht geht darauf ein, wie der Verein Pro Haiti e.V. das Projekt zur Unterstützung der wirtschaftlichen Entwicklung und des Wiederaufbaus in Haiti konzipierte, plante und realisierte. Nach Erläuterung der Ausgangssituation in Haiti und insbesondere in der Region westlich von Port-au-Prince erfolgt eine Vorstellung des Konzepts und eine Projektbeschreibung. In dem Ausbildungszentrum wird eine praxisorientierte Ausbildung von verschiedenen Handwerksberufen wie z. B. Zimmerer, Maurer, Schreiner, etc. angeboten, wobei im praktischen Teil nicht nur ausgebildet, sondern auch produziert und gebaut wird, sodass aus dem Erlös ein Großteil der Ausbildungskosten abgedeckt werden kann. Bei der Tragwerksplanung des Ausbildungszentrums wurde eine Konstruktion entworfen, die hinsichtlich des Lastfalls “Erdbeben” eine ausreichende Sicherheit gewährleistet und unter Berücksichtigung der lokalen Gegebenheiten wirtschaftlich hergestellt werden kann. x | |||||
Medzech, Jürgen; Schrade, Holger | Central Bus Station, Kiel: a perforated brick facade for the parking block / Parkhaus ZOB Kiel: Eine gelochte Mauerwerksfassade für den Zentralen Omnibusbahnhof | Mauerwerk | 5/2019 | 316-323 | Berichte |
AbstractOn the occasion of the Olympic sailing competitions in Kiel, the ZOB and the multi-storey car park above it were built in 1972. x | |||||
Adriaenssens, S.; Ney, L.; Bodarwe, E.; Dister, V. | Centner Footbridge bridges the gap between steel structural design and digital fabrication | Steel Construction | 1/2009 | 33-35 | Articles |
AbstractThe Centner Footbridge at Verviers, Belgium, is a successful design and artifact that links structural optimization and digital steel plate cutting techniques. This steel structure is designed as a statically determinate beam and has a U-profile in cross-section. The webs serving as the safety barriers are assembled from 10 different steel plates that exhibit a laser-cut aperture pattern. The aperture pattern and the steel plate thicknesses have been structurally optimized to deal with the maximum shear forces that occur. For construction purposes, the numerical FE analysis model was translated into a graphic digital model that serves as input data for the steel laser cutter. Once the laser has cut the aperture pattern, the plates are welded together and finished in the fabricator's workshop. The bridge was transported in one piece and installed overnight on site. Recently, the concept of the aperture patterned steel plates has also been successfully applied to other winning design projects. These designs demonstrate that the innovative link between structural optimization and digital steel cutting techniques offers a new and elegant solution for structural systems with a large variety of spans and shapes. x | |||||
CEN/CR 1187 Prüfverfahren zur Beanspruchung von Bedachungen durch Feuer von außen | Bauphysik | 6/2001 | 374 | Technische Regelsetzung - Neue Normen | |
Hauke, B.; Feldmann, M. | CEN-Normen gefährden EU-Ziele | Stahlbau | 6/2010 | 405-406 | Editorial |
CEN-Norm für Dämmstoffe vor entscheidendem Verhandlungsabschnitt | Bauphysik | 4/1994 | 121-123 | Aktuelles | |
CEMEX lobt Förderpreis Beton 2010 aus | Beton- und Stahlbetonbau | 3/2010 | 164 | Aktuelles | |
Thiel, Thomas; Grieger, Christoph; Mechtcherine, Viktor | Cellulosefaser-Leichtbeton (CFLC) - Ein neuartiger Baustoff auf der Basis von Altpapier | Bautechnik | 10/2018 | 733-742 | Aufsätze |
AbstractIm Mittelpunkt dieses Artikels steht ein zementgebundener Leichtbeton auf der Basis von aus Altpapier herausgelösten Cellulosefasern. Die Herstellung dieses neuartigen Leichtbetons basiert im Wesentlichen auf einer Vermischung von aus Altpapier gewonnenen Cellulosefasern und Zementleim. Durch die Variation des Faseranteils lässt sich ein breites Spektrum an Rohdichtewerten erzielen; bei hohen Fasergehalten können nahezu dämmstofftypische Eigenschaften realisiert werden. x | |||||
Bernotat, Anke | Cellular Loop: Ein Freischwinger, entwickelt nach dem Vorbild der Natur | Bautechnik | 12/2013 | 777-782 | Berichte |
AbstractBeim ersten Blick könnte der Cellular Loop ein gewöhnlicher Freischwingerstuhl sein, wären da nicht die außergewöhnliche Zellstruktur und hätte er nicht die Form ähnlich der eines naht- und endlosen Möbiusbandes. Cellular Loop ist leicht, besitzt aber auch die Stabilität und Steifigkeit sowie die Elastizität, die man von einem Freischwingerstuhl erwartet. All diese Eigenschaften verdankt er der Übertragung von Konzepten aus der Natur auf seine Konstruktion und Form. Der Cellular Loop ist der erste Freischwinger, der im Rapid-Manufacturing-Verfahren hergestellt wurde. Ziel des Forschungsprojekts war die Entwicklung einer Fertigungstechnik für die Bauteileherstellung nach biologischen Konstruktions- und Strukturierungsprinzipien. Ein Freischwingerstuhl wurde als Demonstrator gewählt, weil Stühle im Design als die Königsdisziplin gelten und weil sich anhand eines Freischwingers Themen wie dynamische Kräfte, Elastizität und Materialminimierung gut untersuchen lassen. Dank der Übertragung von Vorbildern aus der Natur auf die additive Fertigungstechnik konnte ein leichter, aber auch stabiler Stuhl entstehen, dessen innere Baustruktur an unterschiedliche lokale Belastungen angepasst ist. Selektives Lasersintering ermöglichte ein schichtweises Wachstum der Bauteile nach bionischem Vorbild. x |