Instrumented DMT: review and analysis

Following the research of the Marchetti DMT, instrumented DMTs have been fabricated and investigated for different purposes such as automatic data acquisition, better understanding of the standard Marchetti DMT, dealing with difficult soils or achieving soil stiffness at additional strain levels. In this article, the modification to the displacement measurement and pore-pressure system are reviewed, and a quantitative research on pressure-displacement curves and unload-reload modulus is presented, showing how far the research of instrumented DMTs has gone. Furthermore, a descriptive review of these modifications and data analysis provide deeper understanding of the standard Marchetti DMT and the instrumented DMT, and indicate if a further development of a new device and corresponding interpretation is required