High shear capacity ribbed piles

High shear capacity ribbed piles

Gorasia, R.J.
McNamara, A.M.

2012-06-05

Ribbed bored piles are known to give increased shaft capacity in comparison to conventional straight shafted bored piles. The commercial benefit of greater pile capacity is cheaper foundations. Significant environmental benefits will also accrue from the use of efficient foundations that are able to carry higher load, leading to less excavation and spoil removal requiring disposal, and reduced concrete in construction. Moreover, redevelopment of urban sites often requires removal of existing deep foundations owing to clashes in position of old and new foundations. Higher capacity piles offer potential for greater flexibility in foundation layout owing to their reduced size, making them easier to install around existing piles. This paper describes a series of tests conducted using the City University London Geotechnical Centrifuge. The tests show that concentrically ribbed piles can provide an increase in capacity of about 30% when compared with plain piles. Furthermore, ribbed piles provided a greater capacity than that of a pile with a diameter equal to that of the rib diameter.

bored pile
ribs
pile capacity
centrifuge modelling

https://doi.org/10.4233/uuid:7b8befb5-8059-4501-bc75-b2a29c8fe228

Conference proceedings

conference paper

(c) 2012 Gorasia, R.J.; McNamara, A.M.