Static load tests on foundation piles are generally carried out in order to determine load – the displacement characteristic of the pile head. For standard (basic) engineering practices this type of test usually provides enough information. However, the knowledge of force distribution along the pile core and its division into the friction along the shaft and the resistance under the base can be very useful. Such information can be obtained by strain gage pile instrumentation . Significant investigations have been completed on this technology, proving its utility and correctness , , . The results of static tests on instrumented piles are not easy to interpret. There are many factors and processes affecting the final outcome. In order to understand better the whole testing process and soil-structure behavior some investigations and numerical analyses were done. In the paper, real data from a field load test on instrumented piles is discussed and compared with numerical simulation of such a test in similar conditions. Differences and difficulties in the results interpretation with their possible reasons are discussed. Moreover, the authors used their own analytical solution for more reliable determination of force distribution along the pile. The work was presented at the XVII French-Polish Colloquium of Soil and Rock Mechanics, Łódź, 28–30 November 2016.
If the inline PDF is not rendering correctly, you can download the PDF file here.
 Bustamante M., Doix B., A new model of LPC removable extensometers, Proceedings of 4th Int. Conf. on Pilling and Deep Foundations, STRESA, Italy, April 7–12, 1991.
 Dembicki E., Cudny M., Krasiński A., Zaleski K., Pylon foundation of a cable stayed bridge at the motorway ring road of Wrocław, 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2–6, 2013.
 Fellenius B.H., Tangent modulus of piles determined from strain data, The ASCE Geotechnical Engineering Division Foundation Congress, 1989, Vol. 1, 500–510.
 Fellenius B.H., Brusey W.G., Pepe F., Soil setup, variable concrete modulus, and residual load for tapered instrumented piles in sand, ASCE Specialty Conf. on Performance Confirmation of Constructed Geotech. Facilities, University of Massachusetts, Amherst, USA, April 9–12, 2000.
 Fellenius B.H., Determining the resistance distribution in piles. Part 1: Notes on of no-load reading and residual load. Part 2: Method for determining the residual load, Geotechnical News Magazine. 2002, 20(2), 35–38 and 20(3) 25–29.
 Fellenius B.H., Determining the true distributions of load in instrumented piles, ASCE International Deep Foundation Congress, Orlando, Florida, 2002.
 Fellenius B.H., Unified design of piled foundations with emphasis on settlement, ASCE, Current Practice and Future Trends in Deep Foundations, GSP No. 125, Los Angeles, California, 2004, 253–275.
 Fellenius B.H., Kim S.R., Chung S.G., Long-term monitoring of strain in strain-gage instrumented piles, ASCE Journal of Geotechnical and Geoenvironmental Engineering, 2009, 135(11), 1583–1595.
 Fellenius B.H., Ochoa M., Testing and design of a piled foundation project. A case history, Geotechnical Engineering, Journal of the Southeast Asian Geotechnical Society, 2009, 40(3), 129–137.
 Kim S.R., Chung S.G., Fellenius B.H., Distribution of residual load and true shaft resistance for a driven instrumented test pile, Canadian Geotechnical Journal, 2011, (48)4, 583–598.
 Krasiński A., Sieńko R., Pomiar pionowego rozkładu siły w palu podczas testów statycznych, 56 Konferencja Naukowa Kielce–Krynica, 19–24.09.2010, (in Polish).
 Krasiński A., Sieńko R., Wykorzystanie pomiaru pionowego rozkładu siły w palu do interpretacji testów statycznych, Magazyn Autostrady, 2010, 11, 24–28, (in Polish).
 Krasiński A., Wyniki badań terenowych pali i kolumn wkręcanych, Inżynieria Morska i Geotechnika, 2011, 6, (in Polish).
 Krasiński A., Numerical simulation of screw displacement pile interaction with non-cohesive soil, Archives of Civil and Mechanical Engineering, 2014, Vol. 14, No 1. 122–133.
 Krasiński A., Kusio T., Pile model tests using strain gauge technology, Studia Geotechnica et Mechanica, 2015, 37(3), 49–52.
 Liu B., Zhang D., Xi P., Mechanical behaviors of SD and CFA piles using BOTDA-based fiber optic sensor system: A comparative field test study, Measurement, July 2017, Vol. 104, 253–262. DOI: 10.1016/j.measurement.2017.03.038.
 Sahajda, K., Discussion to the paper of A. Krasiński: “The results of field tests on screw piles and columns”, Inżynieria Morska i Geotechnika, 2012, Vol. 33, No. 2, 114–118 (in Polish).
 Siegel T.C., Mcgillivray A., Interpreted residual load in an augered cast-in-place pile, 34th Annual Conference on Deep Foundations, Deep Foundations Institute, 2009, 173–182.