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Identification of residual force in static load tests on instrumented screw displacement piles

Abstrakt

Occurrence of the so-called residual force of an unknown value significantly disturbs interpretation of static load tests performed on piles equipped with additional measuring instruments. Screw displacement piles are the piling technology in which the residual force phenomenon is very common. Its formation mechanism is closely related to the installation method of this type of piles, which initiates generation of negative pile skin friction without any additional external factors. Knowledge of the value and distribution of a residual force (trapped in a pile shaft before starting the load test) is a condition necessary for the proper interpretation of instrumented pile test results. In this article, a clear and easy-to-use method of residual force identification, based on the analysis of shaft deformations recorded during pile unloading is presented. The method was successfully verified on two pile examples and proved to be effective and practical.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
Studia Geotechnica et Mechanica nr 43, strony 438 - 451,
ISSN: 0137-6365
Język:
angielski
Rok wydania:
2021
Opis bibliograficzny:
Krasiński A., Wiszniewski M.: Identification of residual force in static load tests on instrumented screw displacement piles// Studia Geotechnica et Mechanica -Vol. 43,iss. 4 (2021), s.438-451
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.2478/sgem-2021-0025
Weryfikacja:
Politechnika Gdańska

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