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

• Autorzy: Krasiński Adam , Wiszniewski Mateusz

Identyfikatory

DOI

10.2478/sgem-2021-0025

• Języki publikacji: EN

Abstrakty

EN

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 necessary condition 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.

Słowa kluczowe

EN

residual force; pile load test; pile instrumentation; load distribution; displacement pile

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2021
• Tom: Vol. 43, nr 4
• Strony: 438--451
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Krasiński Adam

• Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdansk, Poland

autor

Wiszniewski Mateusz

• Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdansk, Poland

Bibliografia

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