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Author(s):	Marchetti, Diego; Fabris, Carla; Schweiger, Helmut F.
Title:	The Flat Dilatometer and Seismic Dilatometer for in situ testing / In-situ-Versuche mit Flat Dilatometer und seismischem Dilatometer
Abstract:	In the last decades there has been a massive migration from laboratory testing to in situ testing, to the point that, today, in situ testing is often the major part of a geotechnical investigation. In particular direct-push in situ tests, such as Cone Penetration Test (CPT) and the Flat Dilatometer Test (DMT), are fast and convenient in situ tests for routine site investigation. The scope of this paper is to describe the DMT and its recent updates, in particular the Seismic Dilatometer Test (SDMT) for measuring shear and compression wave velocities and the automated dilatometer probe (Medusa DMT). An Example of SDMT test results and its application to derive soil stiffness parameters are shown, as well as the result of a class-A prediction of an anchor pull-out test, which was calibrated with the SDMT profile. In-situ-Versuche haben in den letzten Jahrzehnten gegenüber Laborversuchen deutlich an Bedeutung gewonnen und stellen in manchen Fällen den Hauptanteil eines geotechnischen Untersuchungsprogramms dar. Insbesondere Drucksondierungen (CPT) und Flat Dilatometer Tests (DMT) sind schnelle und einfach durchführbare In-situ-Versuche für routinemäßige Baugrunderkundungen. In diesem Beitrag werden neue Entwicklungen des Flat Dilatometers wie der seismische Dilatometerversuch (SDMT) zur Bestimmung von Scher- und Kompressionswellen und der automatische DMT (Medusa DMT) vorgestellt. Als Beispiel werden SDMT-Ergebnisse gezeigt, die zur Kalibrierung von Steifigkeitsparametern für numerische Berechnungen eines Ankerzugversuchs im Seeton verwendet wurden.
Source:	Geomechanics and Tunnelling 12 (2019), No. 4
Page/s:	306-317
Language of Publication:	English/German

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