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Author(s):	Placzek, D.
Title:
Abstract:	The success of a tunnel project depends on successfully overcoming the ground conditions and the geological risks. Despite this basic fact, the production of technical regulations and guidelines, the further development of machine technology and improving methods of surveying and control, mishaps still often occur during tunnel drives, affecting either the tunnel itself or the surroundings, e.g. existing infrastructure or buildings. The causes are often multifaceted but can almost always be attributed to the existing ground conditions, which had not been appropriately determined, described, or considered in the design, or taken into account during construction. The following explanations describe the risks inherent in ground conditions and show how these risks can be countered by appropriate ground investigations for tunnelling. Der Erfolg eines Tunnelvortriebs hängt von der sicheren Beherrschung des Baugrunds und der hierin liegenden Risiken ab. Trotz dieser grundlegenden Erkenntnis, der Erarbeitung von technischen Vorschriften und Richtlinien, der Weiterentwicklung der Maschinentechnik sowie einer verfeinerten Mess- und Steuerungstechnik kommt es immer Tunnelvortrieb wieder beim zu Schäden, die entweder unmittelbar den Vortrieb selbst oder das Umfeld, z. B. bestehende Infrastruktur oder Bauwerke, betreffen. Die Ursachen sind häufig vielfältiger Natur, lassen sich aber überwiegend auf die vorherrschenden Baugrundverhältnisse zurückführen, die entweder nicht zutreffend ermittelt, beschrieben, planerisch umgesetzt oder ausführungstechnisch berücksichtigt wurden. Die nachfolgenden Ausführungen beschreiben die im Baugrund vorhandenen Risiken und zeigen auf, wie diesen Risiken durch gezielte Baugrunduntersuchungen für den Tunnelbau begegnet werden kann.
Source:	Geomechanics and Tunnelling 3 (2010), No. 3
Page/s:	308-317
Language of Publication:	English/German

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