Safety assessment of two piling designs for foundation of a bridge pylon

• Autorzy: Kubzdela A. , Florkiewicz A.
• Języki publikacji: EN

Abstrakty

EN

Considered is a case study of a bridge pylon supported on bored piles of 1.5m in diameter. Different piling designs are compared with respect to their safety. The original design comprised 88 piles, each 30 m long. The modified design comprised reduced number of bored piles, with grouted base and pile length shortened to 24 m. In the first part of the paper values of safety margin, Cornell’s reliability index and failure probability for the original design and for the modified design with 77 piles were computed using the framework of the theory of reliability. Random variables included adopted ultimate base and shaft unit resistances and the technological factor for pile shaft, all considered as normal random variables with the coefficient of variation of 0.1. In the second part the number of grouted piles was also varied between 77 and 84, and the resulting safety parameters were compared with the original piling design.

Słowa kluczowe

EN

foundation engineering; reliability theory; safety of structures

• Wydawca: Wydawnictwo Politechniki Poznańskiej
• Czasopismo: Foundations of Civil and Environmental Engineering
• Rocznik: 2011
• Tom: No. 14
• Strony: 63--71
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Kubzdela A.

• Poznan University of Technology Institute of Civil Engineering

autor

Florkiewicz A.

• Poznan University of Technology Institute of Civil Engineering

Bibliografia

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• 3. Duncan J. M., Factors of Safety and Reability in Geotechnical Engineering. Journal of Geotechnical and Geoenvironmental Engineering, 126, 4 (2000) 307-316.
• 4. Harr M. E.: Reliability-based design in civil engineering. McGraw-Hill, New York 1987.
• 5. Przewłócki J., Problemy stochastycznej mechaniki gruntów. Ocena niezawodności. Dolnośląskie Wydawnictwo Edukacyjne, Wrocław 2006.
• 6. Puła W., Zastosowania teorii niezawodności konstrukcji do oceny bezpieczeństwa fundamentów. Oficyna Wydawnicza Politechniki Wrocławskiej, Wrocław 2004.
• 7. PN-83/B-02482. Fundamenty budowlane. Nośność pali i fundamentów palowych.
• 8. Whitman R.V.: 1984. Evaluating calculated risk in geotechnical engineering. J. Geotech. Engng, ASCE 110, 2 (1984) 145-186.