Artikeldatenbank
Autor(en) | Titel | Zeitschrift | Ausgabe | Seite | Rubrik |
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Cover Picture: Geomechanics and Tunnelling 4/2018 | Geomechanics and Tunnelling | 4/2018 | Cover Pictures | ||
KurzfassungA new run-of-river power plant with a total capacity of 531 MW is being built about 50 kilometers southeast of the Chilean capital Santiago at an altitude of about 2, 500 m above sea level. The Chilean tunnel construction division of Strabag SE was commissioned by Alto Maipo S.p.A. in 2012 with the planning work and a construction contract for one of the two sections of the tunnel and civil engineering works for this project. To secure the tunnelling work, DSI Underground Chile has supplied a comprehensive system of support equipment since the start of construction, see page 390 (photo DSI Underground). x | |||||
Cover Picture: Geomechanics and Tunnelling 3/2020 | Geomechanics and Tunnelling | 3/2020 | Cover Pictures | ||
KurzfassungThe Tren Interurbano rail connection between Toluca and Mexico City includes a 4.7 km long twin-bore tunnel, which was driven by two multi-mode TBMs in heterogeneous geology. During construction of a cross passage between the two parallel tubes, water broke in several times. The section could finally be supported using a combined polyurethane and silicate resin grouting system to fill cavities and seal against water pressure (photo: DSI Underground) (see page 339). x | |||||
Cover Picture: Geomechanics and Tunnelling 3/2018 | Geomechanics and Tunnelling | 3/2018 | Cover Pictures | ||
KurzfassungFor the extension of the Metro T Third Line in San Francisco, 2.7 km of tunnels and four new stations will be built. At the Chinatown Station, a cross-cut cavern was excavated by the side drift method. A 27 m long AT-139 pipe umbrella was used to secure the crosscut and the two side drifts, see page 301 (Photo: DSI Underground) x | |||||
Cover Picture: Geomechanics and Tunnelling 2/2021 | Geomechanics and Tunnelling | 2/2021 | Cover Pictures | ||
KurzfassungFrom the excavation pit of the future Sydney Metro Pitt Street station, a connecting tunnel had to be constructed underneath a busy road. To secure the station box wall, the AT - Pipe Umbrella System was used, which was installed at a 19° downwards. In close cooperation with the drilling equipment specialist Robodrill, DSI Underground has developed a successful concept for the installation of the AT - Pipe Umbrella System consisting of 60 individual pipes with a length of 18 meters each. For this project, DSI Underground's proprietary squeezed connection for pipe umbrella pipes has been used as a replacement for a conventional threaded connection. (photo: DSI Underground) x | |||||
Grabe, Jürgen; Wu, Lingyue | Coupled Eulerian-Lagrangian simulation of the penetration and braking behaviour of ship anchors in clay | geotechnik | 3/2016 | 168-174 | Fachthemen |
KurzfassungSubmarine power cables are buried in the seafloor for protection against external threats such as ship anchors. The determination of the optimum burial depth is still an important research topic. This paper presents numerical simulations of the penetration and braking behaviour of ship anchors in a clayey seabed. The visco-hypoplastic constitutive model was applied to model the viscous behaviour of clay. The Runge-Kutta-Fehlberg 4/5 integration method was implemented in the coupled Eulerian-Lagrangian analysis in Abaqus/Explicit to improve the efficiency and accuracy of the calculation. The soil model and the integration method were validated with a benchmark test. In the numerical simulations, typical anchor behaviours were observed and the basic mechanisms of the penetration of ship anchors in clay were revealed. Varying the simulation parameters shows the main factors (anchor size, soil strength and dragging speed) influencing the penetration depth, providing important information for the risk assessment of submarine power cables in the future. x | |||||
Pigorsch, Jörg | Countdown Runway-Sanierung | UnternehmerBrief Bauwirtschaft | 11/2015 | 10-13 | Berichte |
KurzfassungFlughafenbetreiber entscheiden sich immer öfter, ihre Flugbetriebsflächen in kürzester Zeit zu sanieren. Hierfür ausschlaggebend sind maßgeblich die Kundenwünsche der Airlines nach einer möglichst geringen Einschränkung der Betriebsabläufe auf dem Airport sowie wirtschaftliche Aspekte aus der Betrachtung verschiedener Sanierungsvarianten im Vorfeld. Die HEITKAMP Erd- und Straßenbau GmbH hat sich in den vergangenen Jahren auf diese Art von High-Speed-Sanierungen spezialisiert. Wir stellen hier drei Projekte vor. x | |||||
Holm, Andreas; Kagerer, Florian; Sprengard, Christoph; Walberg, Dietmar; Gniechwitz, Timo | Cost-effectiveness of nearly zero energy detached houses / Wirtschaftlichkeit von Einfamilienhäusern in Niedrigstenergiebauweise | Mauerwerk | 1/2017 | 34-46 | Fachthemen |
KurzfassungWhile new buildings or appropriately carried out refurbishment can already show considerable potential for the reduction of greenhouse gas emissions with the available technology and definite measures, a certain “last mile” problem would arise if the requirements were made increasingly stringent toward zero-energy building: the more saved in the overall balance, the more laborious are the measures that have to be introduced. x | |||||
Fermaud, Charles; Malioka, Vasiliki | Cost-effectiveness of measures as a basis for safety decisions / Kosten-Wirksamkeit von Maßnahmen als Basis für Sicherheitsentscheidungen | Geomechanics and Tunnelling | 5/2012 | 605-612 | Topics |
KurzfassungIn absolute terms safety describes a state which is free of any hazard. Indeed, such a state is not achievable - independent of the available technology and the financial resources. To achieve a safe system can only be a conditional objective. Thus the question arises “How safe is safe enough?” The question has been systematically treated for years using quantitative risk analysis and evaluation. Nowadays risk acceptance criteria are often clearly defined. However there is still a large area of discretion, where costs and benefits of additional safety must carefully be weighed. Such balancing is particularly difficult, if the technology to improve safety is available but it is expensive and their effect on safety is potentially small. The presented paper addresses a practicable methodology to evaluate the appropriateness of additional safety measures using cost-effectiveness-criteria. It has been applied in numerous projects related to safety in tunnels. x | |||||
Corrosion protection for cold-formed structural steel elements | Stahlbau | 1/2022 | 48 | Empfehlungen der Redaktion | |
Britner, Alexander; Dieu, Corinne; Podleschny, Ralf | Corrosion protection for cold-formed structural steel elements | Steel Construction | 4/2021 | 250-257 | Articles |
KurzfassungUnprotected steel and steel structures exposed to the atmosphere inevitably corrode. For thin-gauged structures especially, corrosion is critical for stability. Although the reduction in thickness caused by corrosion is insignificant for some structures, in other structures corrosion is unacceptable. Therefore, corrosion protection is a crucial issue for steel structures and the steel industry. Over the last decades, many new corrosion protection systems and innovative steel products have been introduced onto the market. Corrosion protection for cold-formed structural steel elements has been standardized through the introduction of the EN 1090-4. This paper introduces the harmonized rules for the corrosion protection of loadbearing thin-gauged structures. The zinc-magnesium-aluminium (ZM) metal coating system developed in recent years is also dealt with. 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 | |||||
Zimmermann, Thomas; Lehký, David; Strauss, Alfred | Correlation among selected fracture-mechanical parameters of concrete obtained from experiments and inverse analyses | Structural Concrete | 6/2016 | 1094-1103 | Technical Papers |
KurzfassungThe correlations among selected parameters of concrete were investigated for concrete mixes of the strength classes C20/25, C25/30, C30/37, C40/50 and C50/60. The focus was laid on correlations between basic mechanical parameters such as compressive strength, tensile strength and modulus of elasticity as well as parameters related to concrete fracture, represented here by specific fracture energy. Laboratory tests examining the fracture behaviour and mechanical properties were carried out in order to determine the fundamental concrete parameters. In particular, standard compression tests on test cubes and three-point bending tests on beams with central edge notch were performed. Additional material parameters were identified using the inverse analysis technique. Finally, correlation factors between different parameters of concrete were identified using the rank-order correlation method. x | |||||
Corrections and amendments to Kathage et al. | Steel Construction | 4/2014 | 281 | Corrigendum | |
Correction to: Non-linear analysis of statically indeterminate SFRC columns. Structural Concrete | Structural Concrete | 2/2014 | 268 | Erratum | |
Correction Site Report: "The new Eibsee gondola on the Zugspitze: Dywidag systems for Germany's highest construction site" / Richtigstellung zu Bericht "Die neue Eibsee-Gondel auf der Zugspitze: Dywidag-Systeme für Deutschlands höchste Baustelle" | Geomechanics and Tunnelling | 2/2017 | 222 | Erratum | |
Rast, Ronald | Corona-Krise und Mauerwerksbau | Mauerwerk | 2/2020 | 71 | Editorial |
Brehm, Eric | Corona und andere Herausforderungen für den Mauerwerksbau | Mauerwerk | 3/2020 | 117 | Editorial |
Stucchi, Fernando; Ungaretti, Marcelo Coelho; Fujii, Gilson; Peiretti, Hugo Corres; Martin, José Soriano; Doniak, Sérgio | Corinthians Arena - 2014 World Cup, design and construction | Structural Concrete | 5/2016 | 698-709 | Technical Papers |
KurzfassungThis paper describes the design and construction of the concrete structures of the Corinthians Arena built for the 2014 World Cup. Due to many constraints, the structure was designed, essentially, with prefabricated structural concrete members, some specific elements were designed with structural concrete cast in situ, and some areas, with special construction problems, were designed with composite steel-concrete structures. x | |||||
CoreScan3 - new drill core logger from DMT / CoreScan3 - neuer Bohrkern-Scanner der DMT | Geomechanics and Tunnelling | 3/2011 | 273 | Product Information | |
Duna, László; Kövesdi, Balázs; Joó, Attila László; Seres, Noémi; Budaházy, Viktor; Kachichian, Mansour | Cooperation between Weimar and Budapest on computational modelling of steel and composite structures | Stahlbau | 4/2019 | 363-369 | Aufsätze |
KurzfassungDedicated to Univ.-Prof. Dr.-Ing. habil. Frank Werner on his 70th birthday x | |||||
Conversion of a listed silo building State archive of North-Rhine-Westphalia, Duisburg / Umbau eines unter Denkmalschutz stehenden Silogebäudes Landesarchiv Nordrhein-Westfalen, Duisburg | Mauerwerk | 6/2016 | 483-484 | Aktuell | |
Gruber, Luzi R.; Holstein, Uwe | Conventional tunnel drives at Sedrun / Konventionelle Vortriebe Sedrun | Geomechanics and Tunnelling | 2/2016 | 111-128 | Topics |
KurzfassungThe Sedrun section in the middle of the Gotthard Base Tunnel was critical in terms of scheduling and without doubt the section with the most complicated logistics. The article gives an overview of the complex overall construction measures and describes in detail the geotechnical and logistical challenges that had to be overcome. x | |||||
Chró cielewski, Jacek; Cywi ski, Zbigniew; Sitarski, Arkadiusz | Conventional and advanced bending strength analysis of common and castellated, homogeneous and hybrid I-beams | Stahlbau | 2/2012 | 142-150 | Fachthemen |
KurzfassungAn appropriate investigation has been performed in order to estimate the bending strength safety of steel I-beams typical in traditional and up-to-date computational analyses. The bending strengths of the conventional analysis have been set in general form for the beam parameters of the span/depth ratios usually observed. Mutual strength relationships between common and castellated, homogeneous and hybrid I-beams, reflect the anticipated regularities. Use of the advanced analysis, founded on the non-linear FEM approach, required the solution of adequate practical examples. In view of the research class, certain completion of the typical non-linear procedure was needed. x | |||||
Becker, J. | Controlling-Instrumente in Bauunternehmen. | Bautechnik | 10/1994 | 642-650 | Fachthemen |
KurzfassungControlling wird sowohl in der Literatur als auch in der Praxis teilweise sehr unterschiedlich dargestellt. Der Beitrag erläutert und systematisiert Controlling und seine Inhalte, um die praktischen Anwendungen am richtigen Ort, zur richtigen Zeit und durch die richtige Person einzusetzen. Die praktische Umsetzung wird ergänzt durch die Vorstellung des allgemeinen Instrumentariums aus der Betriebswirtschaft sowie einige spezielle Instrumente und Methoden in Bauunternehmen und im Baubetrieb. x | |||||
Malkwitz, Alexander; Poloczek, Adam | Controlling über Kapitalbindung und -rendite bei Bauprojekten | UnternehmerBrief Bauwirtschaft | 9/2013 | 3-8 | Berichte |
KurzfassungWie bewerten Sie den Erfolg oder Misserfolg einer Baustelle? Hier gibt es verschiedene Mittel und Wege. Manche Baufirmen verzichten nahezu komplett auf die Erfolgsbewertung einer Baustelle. Andere beziehen den Erlös auf die erbrachte Bauleistung. Bei der üblichen Zuschlagskalkulation ist dies beispielsweise der Fall. Damit geht die Bauwirtschaft einen abweichenden Weg gegenüber anderen Unternehmen, die ihren Erfolg in Relation zum eingesetzten Kapital stellen, um feststellen zu können, ob eine Maßnahme oder ein Projekt “erfolgreich” waren. Das Ergebnis dieser Rechnung ist eine projektspezifische Kapitalrendite. Unsere Autoren stellen diese Bewertungsmethode näher vor und erläutern sie an Hand eines Beispiels aus dem Hochbau. Diese Methodik kann für die eine oder andere Baufirma eine interessante Möglichkeit eröffnen, Bauprojekte ihres Unternehmens aus einem anderen Blickwinkel zu betrachten und eine neue Controllingmethode zu erschließen. x |