Published Resources Details
Journal Article
- Title
- The analysis of pile raft systems
- In
- Australian Geomechanics Journal
- Imprint
- vol. G2, no. 1, Dec 1972, pp. 21-27
- Url
- https://geomechanics.org.au/wp-content/uploads/2015/02/G2_3.pdf
- Description
Paper No.3019, submitted by the authors on January 22, 1971. The authors, E. H. Davis, BSc(Eng) FIEAust, and H. G. Poulos, BE PhD, MIEAust, are respectively, Professor, and Reader, School of Civil Engineering, University of Sydney.
[This paper was awarded the 1972 W. H. Warren Memorial Prize]
- Abstract
In the design of the foundation for a large building on a deep deposit of clay, it may be found that a raft foundation would have an adequate factor of safety against ultimate bearing capacity failure but that the settlements would be excessive. Normal practice (assuming the addition of basements to produce a floating foundation is unacceptable) would then be to pile the foundation, the number of piles being chosen to give an adequate factor of safety against individual pile failure and assuming the piles take all the load. However, it is clearly illogical to design the piles on an ultimate load basis when they have only been introduced in order to reduce the settlement of an otherwise satisfactory raft.
A method of analysing such pile-raft systems, and of determining the required number of piles to reduce the settlement to the required amount, is outlined in this paper.