Undrained shear strength of Lisbon Miocene clay: a reappraisal based on triaxial and pressuremeter test results

2021

M. Matos Fernandes

Journal Article

ABSTRACT

Undrained shear strength plays a fundamental role on the behaviour of clays. In overconsolidated clays, this parameter is largely influenced by test conditions, namely consolidation stress. ?Prazeres Clay? is a Miocene overconsolidated formation, that can be found in a significant part of Lisbon area. Over the last decades a number of very relevant constructions have generated a large database for physical and mechanical properties of Miocene clays. Included in a broader study at the Faculty of Engineering of Porto University about Miocene clay?s physical and mechanical properties, existing data was gathered, treated and critically analysed, in order to establish a useful framework for geotechnical designers. This paper presents the results obtained for undrained shear strength, obtained from triaxial tests and Ménard Pressuremeter tests. It addresses the main difficulties associated with test?s interpretation and presents a discussion on how theoretical values relate to experimental ones. The paper proposes a range of variation for Prazeres Clay? undrained shear strength based on a significant amount of test results, that is considered to be useful for geotechnical design.

DATASHEET
Title
Undrained shear strength of Lisbon Miocene clay: a reappraisal based on triaxial and pressuremeter test results
AUTORS
  • M. Matos Fernandes
KEYWORDS
Miocene clays ; Overconsolidation; Pressuremeter tests; Triaxial tests; Undrained shear strength
PUBLICATION TYPE
Journal Article
PUBLICATION YEAR
2021
JOURNAL
SN Applied Sciences (Volume 4, Issue 11, Pages 1-14, )
URI
RESEARCH UNITS
KNOWLEDGE AREA
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