Journal articles
Author(s) | Title | Journal | Issue | Page | Category |
---|---|---|---|---|---|
Schubert, Wulf | 25 years of research and development at the Institute of Rock Mechanics and Tunnelling at Graz University of Technology / 25 Jahre Forschung und Entwicklung am Institut fĂŒr Felsmechanik und Tunnelbau an der Technischen UniversitĂ€t Graz | Geomechanics and Tunnelling | 3/2018 | 203-212 | Topics |
AbstractThe Institute of Rock Mechanics and Tunnelling at the Graz University of Technology was founded in 1992. From the beginning, the primary focus of research and development was on Alpine tunnelling and slope stability issues, considering geological conditions and their impact on construction. The aim was to improve the current practice, as well as to reduce uncertainties. The research areas can be roughly grouped into rock mass characterization, improvement of monitoring data interpretation, ground behaviour assessment, as well as development and improvement of support elements. The research is documented in about 110 master theses and 30 doctoral theses, and approximately 350 papers. x | |||||
Schubert, Wulf | 66. Geomechanics Colloquium / 66. Geomechanik Kolloquium | Geomechanics and Tunnelling | 5/2017 | 428 | Editorials |
Schubert, Wulf | Current state of tunnelling in fault zones / Stand der Technik des Tunnelbaus in Störzon | Geomechanics and Tunnelling | 4/2017 | 326 | Editorials |
Schubert, Wulf | 65. Geomechanics Colloquium | Geomechanics and Tunnelling | 5/2016 | 368-369 | Editorial |
Schubert, Wulf | EUROCK 2015 & 64th Geomechanics Colloquium | Geomechanics and Tunnelling | 5/2015 | 370 | Editorial |
Schubert, Wulf | 63rd Geomechanics Colloquium / 63. Geomechanik Kolloquium | Geomechanics and Tunnelling | 5/2014 | 389 | Editorial |
Schubert, Wulf | 62nd Geomechanics Colloquium / 62. Geomechanik Kolloquium | Geomechanics and Tunnelling | 5/2013 | 385 | Editorial |
Schubert, Wulf | 61st Geomechanics Colloquium - 50 Years NATM / 61. Geomechanik Kolloquium - 50 Jahre NĂT | Geomechanics and Tunnelling | 5/2012 | 404-405 | Editorial |
Schubert, Wulf | 60th Geomechanics Colloquium / 60. Geomechanik Kolloquium | Geomechanics and Tunnelling | 5/2011 | 356-359 | Editorial |
Schubert, Wulf | Editorial: Geomechanics and Tunnelling 3/2011 | Geomechanics and Tunnelling | 3/2011 | 174 | Editorial |
Schubert, Wulf | Experience of tunnel construction in weak ground / Erfahrungen beim Bau von Tunneln in schlechtem Baugrund | Geomechanics and Tunnelling | 3/2011 | 211-220 | Topics |
AbstractA whole range of problems are generally associated with the construction of tunnels in weak ground and under high overburden. Among those are large displacements, wide variation of stresses and strains, and sudden water ingress, to name just a few. A wide variety of behaviours can be experienced, depending on the ground conditions and the influencing factors. The contribution deals with experience from the construction of several Alpine tunnels in faulted rock masses. Specific characteristics of each project are highlighted, and the lessons learned described. x | |||||
Schubert, Wulf; BlĂŒmel, Manfred; Staudacher, Robert; Brunnegger, Stefan | Support aspects of tunnels in fault zones / Aspekte des Ausbaus von Tunneln in Störungszonen | Geomechanics and Tunnelling | 4/2017 | 342-352 | Topics |
AbstractSpecial considerations are required for the support of tunnels in fault zones. On the one hand, standard support elements are not compatible with the imposed displacements. On the other hand, local shearing can cause damage to the lining already at rather small displacements magnitudes. Cracks in the lining frequently are observed, when the geometry of the tunnel changes, or at the intersection with cross passages. As strengthening of the lining in many cases cannot prevent damage, temporarily leaving an open gap in the primary lining. Implementing yielding elements into the lining is as well feasible, as economical increasingly replaces the traditional method of leaving open gaps. This results in a better utilization of the lining's capacity and a considerable reduction of displacements. As the lining with integrated yielding elements develops considerable thrust, a transfer of the loads via the construction joints is required. Thus, careful construction of those joints is essential. Another problem can be the bond between bolt, grout, and rock mass, as the bolts are installed, when the displacement rate is highest, and the strength of the grout still low. This paper deals only with phenomena caused by discontinuities and large displacements, and does not address other hazards, like flowing ground. x | |||||
Schubert, Wulf; Brunnegger, Stefan; Staudacher, Robert; Wenger, Julian | Further development of yielding elements and connecting elements for shotcrete / Weiterentwicklung von Stauchelementen und SpritzbetonanschlĂŒssen | Geomechanics and Tunnelling | 5/2018 | 575-581 | Topics |
AbstractYielding elements in combination with shotcrete linings are used in Austria since 1994, replacing the previous method of leaving open gaps. The first system, used at the Galgenbergtunnel, consisted of groups of axially loaded steel pipes with manufactured local weakness. The resistance of those elements showed a pronounced oscillation during shortening. This triggered a first improvement of the elements in the late 1990ies. Those elements were called LSC (Lining Stress Controller) and subsequently successfully used on a significant number of projects around the world. Recently, the yielding elements have been further optimized aiming at easier production and lower costs. Still using steel pipes, those are filled with porous material, increasing the elements' capacity. With sequential excavation, construction joints in the shotcrete lining are necessary. Producing quality joints appears to be difficult without special connecting elements. The so produced connections are thus potential points of weakness, reducing the lining capacity. A prototype of a connecting element was developed, which can be easily produced and installed. Site tests have been successfully conducted at the tunnel Stein in Austria. x | |||||
Schubert, Wulf; Jedlitschka, Gernot | 71 Geomechanics Colloquium - 71. Geomechanik Kolloquium | Geomechanics and Tunnelling | 5/2022 | 439 | Editorials |
Schubert, Wulf; Jedlitschka, Gernot | 70. Geomechanics Colloquium / 70. Geomechanik Kolloquium | Geomechanics and Tunnelling | 5/2021 | 423 | Editorials |
Schubert, Wulf; Lauffer, Harald | NATM - from a construction method to a system / NĂT - von der Bauweise zum System | Geomechanics and Tunnelling | 5/2012 | 455-463 | Topics |
AbstractThe term NATM was introduced by Rabcewicz during a lecture at the Geomechanics Colloquium in 1962. In this lecture, he summarizes the development of tunnelling methods and insight into mechanical processes in the ground over the last decades, and points out the positive experience made with a combination of shotcrete and rock bolts instead of the traditional timber or steel supports. Building on experience and development around the world, it has been Austrian engineers who have systematically developed and applied the method. In the beginning technological questions played a major role, but it was also clear that traditional design methods were no longer applicable. Thus it was still unavoidable to rely heavily on experience and observation. The importance of measurements for observing the system behaviour has been acknowledged, and techniques have been developed considerably further since then. Parallel to gaining more experience with the method in all kinds of ground conditions, contractual practices have also been further developed with the aim of establishing rules, which allow fair compensation of the contractor in spite of all the inherent uncertainties. In Austria, tunnel design practice has been standardized by the introduction of a guideline. x | |||||
Schubert, Wulf; Moritz, Bernd | Virtual Geomechanics Colloquium / Virtuelles Geomechanik Kolloquium | Geomechanics and Tunnelling | 6/2020 | 583 | Editorials |
Schubert, Wulf; Moritz, Bernd | Virtual Geomechanics Colloquium / Virtuelles Geomechanik Kolloquium | Geomechanics and Tunnelling | 5/2020 | 439 | Editorials |
Schubert, Wulf; Moritz, Bernd | 68. Geomechanics Colloquium / 68. Geomechanik-Kolloquium | Geomechanics and Tunnelling | 5/2019 | 396 | Editorials |
Schubert, Wulf; Moritz, Bernd | The state of the art in monitoring and geotechnical safety management for shallow and deep tunnels | Geomechanics and Tunnelling | 5/2015 | 409-413 | Topics |
AbstractDue to uncertainties in the ground model and the spread of geotechnical properties, prediction of the exact system behaviour of underground structures is difficult in many cases. In order to manage this problem, the so-called observational approach is often applied. Monitoring plays an important role to verify or falsify design assumptions, to adjust excavation and support measures to the actual conditions and to assess the stability of the system. For the management of the residual risk a geotechnical safety management plan is implemented. The OeGG has recently published a handbook summarizing the state of the art in tunnel monitoring and geotechnical safety management. x | |||||
Schubert, Wulf; Moritz, Bernd | State of the art in evaluation and interpretation of displacement monitoring data in tunnels / Stand der Auswertung und Interpretation von Verschiebungsmessdaten bei Tunneln | Geomechanics and Tunnelling | 5/2011 | 371-380 | Topics |
AbstractIn many countries observations of the system behaviour are executed during tunnel construction. However, the enormous potential of modern monitoring and evaluation methods is frequently not utilised. This paper presents different and nowadays common evaluation methods and their benefit is highlighted. Case studies are used for illustration. x | |||||
Schuberth, Jens | Baukosten und Energieeffizienz von MehrfamilienhÀusern | Bauphysik | 1/2019 | 55-59 | Fachthemen |
AbstractSeit 2001 prämiert der Deutsche Bauherrenpreis vorbildliche Neubauten und Sanierungen von Mehrfamilienhäusern. Eine Analyse der neueren Projekte zeigt, dass Wohnungswirtschaft und Planer ein überaus leistungsstarkes Team bilden, welches wirtschaftliches und energieeffizientes Bauen sehr gut vereinbaren kann. Eine hohe Energieeffizienz wirkt sich bei Mehrfamilienhäusern in höchstens geringem Umfang auf die Baukosten auswirken, sowohl bei Neubauten als auch bei Sanierungen. Bei Kaltmieten hat der Standort in einer Großstadt großen Einfluss; Häuser mit niedrigem Primärenergiebedarf werden sogar günstiger vermietet. Pauschale Behauptungen, Anforderungen an die Energieeffizienz von Gebäuden führten zu überhöhten Baukosten und Kaltmieten, erweisen sich vor dem Hintergrund dieser Auswertung anspruchsvoller Projekte als nicht haltbar. Gutachten über die Wirtschaftlichkeit von Energiestandards sollten nicht nur Materialpreise, sondern die Baukosten realisierter Projekte untersuchen und dabei stets mit statistisch abgesicherten Methoden (oder wenigstens mit Bandbreiten) arbeiten. x | |||||
Schuchardt, P.; Vieth, H.-J. | Querkraftkopplungen bei EisenbahnĂŒberfĂŒhrungen - Erneuerung der EĂ SchwarzwaldstraĂe in Karlsruhe | Beton- und Stahlbetonbau | 7/2006 | 518-521 | Berichte |
AbstractDas in der Entstehungszeit des Hauptbahnhofes Karlsruhe erstellte Überführungsbauwerk über die Schwarzwaldstraße ist in einem schlechten baulichen Zustand mit anprallgefährdeten Pendelstützen und muß erneuert werden. Da die Widerlager in einem erhaltenswerten Zustand sind, werden die Auflager und das Tragwerk ersetzt. Gleichzeitig wird die lichte Höhe dem Lichtraumprofil der Stadtbahn angepaßt und der Gesamtquerschnitt in der Breite zwischen Stadtbahn, Straße und Geh- und Radweg neu aufgeteilt. Die Bauarbeiten sind unter Aufrechterhaltung des Betriebs auf den über- und unterführten Gleisanlagen und des Fußgänger- und Radverkehrs durchzuführen. x | |||||
Schueremans, Luc; Furtado, Ana Claudia | FRISOMAT - steel innovator in cold-rolled buildings | Steel Construction | 3/2016 | 255-258 | Reports |
Schuhbauer, A. | Asphaltbeton als Basisabdichtung von Deponien. | Bautechnik | 9/1994 | 566-581 | Fachthemen |
AbstractBis vor einigen Jahren dachte niemand daran, Deponien mit Asphaltbeton oder anderen Asphalterzeugnissen abzudichten. Die Asphaltfachleute waren der Meinung, daß Asphalt schon wegen seiner geringen Beständigkeit gegenüber Lösungsmitteln dafür ungeeignet ist, da ja Asphalt durch aliphatische oder noch leichter durch zyklische Kohlenwasserstoffe und Chlorkohlenwasserstoffe in seine Bestandteile Bitumen und Mineralstoffe zerlegt werden kann. Befestigungen aus Asphalt an Großtankstellen, Flugzeugabstellflächen und Tankfeldern, wo starker Anfall von Benzin, Flugbenzin, Diesel, Heizöl oder anderen Lösungsmitteln auftritt, wurden im Laufe der Zeit zerstört. In neuerer Zeit wird die Verwendung von Asphaltbeton für Deponiebasisabdichtungen propagiert. Das Hauptargument der Befürworter des Asphaltbetons ist, daß sich Asphalt im Wasserbau bei der Herstellung von Kanälen, Talsperren und Speicherbecken bestens bewährt hat. Wenn nun auch eine ausreichende Lösungsmittelbeständigkeit und Chemikalienbeständigkeit nachgewiesen würde, dürfte der Anwendung von Asphaltbeton im Deponiebau nichts mehr im Wege stehen. In dem Forschungsvorhaben "Eignung von Asphalten als Baustoff für Basisabdichtung von Deponien" glauben die Verfasser einen derartigen Nachweis geführt zu haben. x |