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Interpretation of in situ horizontal stress from self-boring pressuremeter tests in sands via cavity pressure less than limit pressure: a numerical study
, Article Environmental Earth Sciences ; Volume 76, Issue 9 , 2017 ; 18666280 (ISSN) ; Keshmiri, E ; Sharif University of Technology
Springer Verlag
2017
Abstract
The paper presents a numerical finite difference model of self-boring pressuremeter test (SBPM) using FLAC software. Different cavity expansion theories in sand have been compared to the results of numerical analyses carried out in this study. Limit pressure is believed to be used as a key parameter for the estimation of soil parameters from pressuremeter tests. In practice, SBPM tests are conducted up to 10–15% cavity strains, and the strain level associated with the limit pressure state is not reached. Therefore, determination of limit pressure usually needs extrapolation. In this paper, the authors suggest to use cavity pressure at 10% strain (P10) for the interpretation of in situ...
Interpretation of in-situ horizontal stress from self-boring pressuremeter tests in sands: A numerical study
, Article 19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017, 17 September 2017 through 22 September 2017 ; 2017 , Pages 567-570 ; Keshmiri, E ; Sharif University of Technology
19th ICSMGE Secretariat
2017
Abstract
In this study, a numerical finite difference model of self-boring pressuremeter test (SBPM) is performed. Limit pressure is believed to be a key parameter for estimation of soil parameters from pressuremeter tests, however; self-boring pressuremeter tests are practically conducted up to 10-15% strains, so determination of limit pressure usually needs extrapolation. For an alternative solution, it is recommended to consider cavity pressure corresponding to 10% strain (P10) for interpretation of soil parameters instead of limit pressure; therefore, more than 5000 numerical analyses of SBPM are carried out to correlate cavity pressure corresponding to 10% strain (P10) to sand parameters with...