Utilizing cone penetration tests for landslide evaluation

M. E. Jorat*, S. Kreiter, Tobias Mörz, V. Moon, W. De Lange

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


Pore pressure and shear strength are two important parameters that control the stability of slopes. These parameters can be derived in-situ by cone penetration testing (CPT) with pore pressure measurements. This paper presents the results from three static, vibratory and dissipation CPT profiles deployed into a landslide headwall at Pyes Pa, Bay of Plenty, New Zealand. The landslide strata consist of volcanic ashes and ignimbrites. Studying the stability of slopes in this area using in-situ geotechnical testing is of societal-economic importance since several other landslides within comparable strata caused considerable property damage. Three CPT profiles were collected across the headwall of the slide scar with 2 m spacing in undisturbed sediments using static, vibratory and dissipation test modes. Static CPT results are used to evaluate soil grain size variations, geotechnical parameters of sediments such as shear resistance, probable slip surface and sensitivity of sediments. Liquefaction potential of sediments is assessed using vibratory CPT results. For dissipation tests, the cone remained stationary in the sediment for ∼60 min to monitor pore pressure dissipation at the depths of 6, 9 and 11m. With the use of pore pressure dissipation data, values of soil horizontal permeability are calculated. The liquefaction probability from static CPT results is compared to liquefaction potential evaluation from vibratory CPT. Last but not least, an unstable soil layer is defined based on static CPT, vibratory CPT and dissipation results.

Original languageEnglish
Title of host publicationSubmarine mass movements and their consequences
Subtitle of host publication6th International Symposium
EditorsSebastian Krastel, Jan-Hinrich Behrmann, David Völker, Michael Stipp, Christian Berndt, Roger Urgeles, Jason Chaytor, Katrin Huhn, Michael Strasser, Carl Bonnevie Harbitz
Place of PublicationCham
Number of pages17
ISBN (Electronic)9783319009728
ISBN (Print)9783319009711
Publication statusPublished - 2014
Externally publishedYes
Event6th International Symposium on Submarine Mass Movements and Their Consequences - Kiel, Germany
Duration: 23 Sep 201325 Sep 2013
Conference number: 6

Publication series

NameAdvances in Natural and Technological Hazards Research
ISSN (Print)1878-9897
ISSN (Electronic)2213-6959


Other6th International Symposium on Submarine Mass Movements and Their Consequences


  • CPT
  • Landslide
  • Static
  • Vibratory
  • Dissipation


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