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Author(s):	Sigl, Oskar
Title:	Special construction methods for tunnels with very shallow overburden - Challenge for innovation
Abstract:	Infrastructure in large cities is getting denser over time. Therefore, interferences with existing structures and complying to project constraints are fast becoming a very common feature during the implementation process of new projects in urban areas. As a consequence, actual geotechnical challenges often require application of innovative methods of construction in order to minimize potential construction impact or disruption. The paper intends to direct the focus on the application of unusual construction methods and will highlight and discuss some very specific solutions to some major challenges of constructing underground projects in urban environments. This is presented in the form of examples applying unusual construction methods for underground structures related to shallow overburden situations such as passenger linkways, which do not normally stand in the forefront of the attention. The paper is written from the viewpoint of a practitioner, who is deeply involved in the actual design for the implementation of such projects. Spezielle Baumethoden für Tunnel in seichter Lage und weichem Baugrund - Herausforderung für Innovation Die Infrastrukturdichte in großen Städten nimmt stetig zu. Folglich werden Eingriffe in bestehende Strukturen sowie einschränkende Projektbedingungen zunehmend häufige Merkmale der Projektumsetzung im Stadtgebiet. Die daraus folgenden geotechnischen Herausforderungen verlangen oftmals innovative Baumethoden, um mögliche Störungen oder sonstige nachteilige Auswirkungen der Baumaßnahmen zu minimieren. Dieser Beitrag lenkt den Fokus auf die Anwendung ungewöhnlicher Bauweisen und erörtert konkrete Lösungsansätze zu einigen der großen Herausforderungen des unterirdischen Bauens in städtischer Umgebung. Dies wird präsentiert anhand von Beispielen für den Einsatz ungewöhnlicher Konstruktionsmethoden für unterirdische Bauwerke in Bereichen mit geringer Überdeckung wie Fußgängerunterführungen, die normalerweise nicht im Vordergrund der Betrachtung stehen. Der Beitrag ist aus dem Blickwinkel eines Fachmanns verfasst, der stark an der Planung und Umsetzung solcher Projekte beteiligt ist.
Source:	Geomechanics and Tunnelling 13 (2020), No. 6
Page/s:	634-640
Language of Publication:	English/German

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