E3S Web Conf.
Volume 66, 2018AG 2018 - 4th International Conference on Applied Geophysics
|Number of page(s)
|Properties of Soil, Rock and Rock Mass
|26 November 2018
Preliminary results of pore pressure profiling on theTęgoborze-Just landslide
AGH University of Science and Technology, Krakow, Poland
2 Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Krakow, Poland
* Corresponding author: email@example.com
In this study, we present the preliminary results of deep profiling of pore pressure in the near surface formations of the Carpathian flysch, on the Tęgoborze-Just landslide near Nowy Sącz in Southern Poland. The aim of the study is to identify zones with significant changes in pore pressure influenced landslide processes. These pore pressure changes correspond to a greater change in the degree of saturation or water flow paths. Profiling was performed in four series using a CPTU static probe with a NOVA Acoustic cone. The measurement of pore pressure in flysch formations is very complicated due to the strong heterogeneity of the medium properties and variable water conditions, which are strongly influenced by the intensity of precipitation. The tests were carried out in a colluvium to a depth of approx. 5.0 m, i.e. to the border of a less weathered bedrock, under varying water conditions. The results obtained indicate the presence of four zones of significant changes in pore pressure. The location of these zone is consistent with the location of the greater displacement measured with the inclinometer. There is a greater probability that these weak zones may form a rupture surface.
Key words: Pore presure / CPTU sounding / Inclinometer / Landslide / Carpathian Flysch
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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