Use of tactile sensors for horizontal stress measurements on a large calibration chamber

Author:

Domingos Gustavo S.1ORCID,Pinto Claudio Pereira2ORCID,Danziger Fernando A. B.3ORCID,Pinheiro Arthur V. S.1ORCID,Lunne Tom4

Affiliation:

1. Researcher Engineer, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil

2. Professor, Federal Centre of Technological Education Celso Suckow da Fonseca, Rio de Janeiro, Brazil

3. Professor, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil (corresponding author: )

4. Expert advisor, Norwegian Geotechnical Institute, Oslo, Norway

Abstract

Large flexible calibration chambers (CCs) to evaluate and develop interpretation methods for cone penetration tests (CPTs) in cohesionless soils have been used since the late 1960s. Nevertheless, only average boundary stress values are known in almost all tests already performed. Tactile pressure sensors (TPS) represent a useful tool to assess the stress distribution in an area under loading and have been applied in some geotechnical studies. This study presents the results of CPTs carried out on a large flexible CC in a very loose and a medium-dense fine quartz sand. TPS were placed on the walls of the CC, allowing the measurement of horizontal stresses and their spatial distribution in all test phases: sample formation, lateral and cavity cell filling, piston filling, sample stressing and CPT. In particular, TPS were able to measure the horizontal stresses before the cavity and lateral cell filling – that is, when no information is available about the horizontal stresses in regular tests. The measurements contribute to the discussion on the influence of the CC boundaries on the test results. The results encourage the use of TPS on a more routine basis in large flexible CC testing.

Publisher

Thomas Telford Ltd.

Subject

Geotechnical Engineering and Engineering Geology

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Editorial;International Journal of Physical Modelling in Geotechnics;2023-11

2. An experimental study of Horizontal Directional Drilling (HDD) in sand in a large flexible calibration chamber;Tunnelling and Underground Space Technology;2023-11

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