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The simultaneous use of piles and prestressed anchors in foundation design |
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| Authors: | FAB Danziger BR Danziger MP Pacheco |
| Institution: | aRio de Janeiro Federal University, PO Box 68506, RJ, 21945-970, Brazil bUniversity of the State of Rio de Janeiro, R. São Francisco Xavier 524, sl. 5034 Bloco E, Maracanã, RJ, 20559-900, Brazil cPolitechnic Institute, University of the State of Rio de Janeiro, R. Inglês de Souza 334, Jardim Botânico, RJ, 22460-110, Brazil |
| Abstract: | The paper presents a simplified design procedure to evaluate the loads in piles and prestressed anchors when simultaneously used in foundations under tension loads and high overturning moments. Although involving some necessary simplifications for the sake of design, the procedure keeps the main features of load transfer from piles and anchors to the surrounding soil. The approximate method has been adopted by the authors in relevant projects in Brazil, whose long term satisfactory performance indicates its appropriate performance. Two practical examples have been selected to illustrate the application of the proposed method. It is shown that anchor prestressing plays an important role in limiting tension loads on the piles and controlling foundation eccentricity. The importance of monitoring for replacement of occasional prestress losses to prevent long-term pile overstressing is illustrated. |
| Keywords: | Anchored piled cap Prestressed foundation Underpinning |
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