Insight into interaction effects between reaction systems and test piles during static tension load tests
Insight into interaction effects between reaction systems and test piles during static tension load tests
During the loading procedure of static pile load tests the reaction system counteracts the movement of the tested pile. This bracing effect results in an overestimation of both, the pile stiffness and the measured pile resistance. Although this phenomenon is widely recognized by execution standards it lacks physical evidence. In this context, the present work reports lessons learnt from two large-scale field tests that aim to provide insight into the underlying mechanism. Moreover, the in-situ measurements serve as basis for calibrated numerical models. From the experimental results it can be inferred that a clear relationship between vertical pile load and horizontal pile shaft pressure exists. This holds true for both micropiles and Ductile Piles tested in tension. This observed tendency is supported by numerical studies. Moreover, it is found that the bracing effect on the normal stress mobilization distributes in a non-constant manner across the pile shaft.
Andreas-Nizar Granitzer; J. Matthias Rebhan; Martin Hayden; Franz Tschuchnigg
5th European Conference on Physical Modelling in Geotechnics (ECPMG2024)
Onshore and offshore foundation systems
https://doi.org/10.53243/ECPMG2024-89
Contact Information
- Secretary General - Dr A M McNamara
- Email: [email protected]
- Phone: +44 20 7040 8154
- City, University of London
- Northampton Square
- London EC1V 0HB. United Kingdom