| Autor: |
Karlsrud, Kjell, Ofstad, Christian Strømme, Sparrevik, Per, Ellingbø, Ola, Brattensborg, Gry |
| Předmět: |
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| Zdroj: |
Journal of Geotechnical & Geoenvironmental Engineering; Jan2023, Vol. 149 Issue 1, p1-12, 12p |
| Abstrakt: |
A series of axial load tests in tension has been carried out on open-ended driven steel pipe piles with a diameter of 406 mm and lengths of 70 and 40 m. At the test site, the ground consists of layers of loose fluvial sand and soft silty marine clay deposits. One test pile was well instrumented with strain gauges. The main scope of the test program was to verify design methods including time effects for pile foundations for new bridges at the site. To verify time or aging effects, the piles were load tested 3, 9, and 18 months after installation. The test results are presented in some detail and compared to bearing capacity and load-displacement response predicted prior to pile installation. An unexpected result of the test program was that several days of stops in driving due to welding of the pile segments and connecting of the instrumentation had a major negative impact on the ultimate bearing capacity of the instrumented pile, which failed at about 50% of the predicted values. Noninstrumented test piles with shorter stops due to welding of segments gave bearing capacities in reasonable agreement with predicted values. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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