Simplified Design Procedure for Piled Raft Foundations - H.G. Poulos, Fellow, AS

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Abstract
"In situations where a raft foundation alone does not satisfy the design requirements, it
may be possible to enhance the performance of the raft by the addition of piles. The use
of a limited number of piles, strategically located, may improve both the ultimate load
capacity and the settlement and differential settlement performance of the raft. This
paper outlines the development of a simplified method of analysis which can provide a
useful tool for preliminary design of piled raft foundations. It involves two phases:
& X  F0 T4 F) b5 O( ^/ v1. The assessment of the overall foundation behavior;
2. The assessment of the behavior under individual column loads.
9 i7 W" y$ f  L- R5 uIn both cases, use is made of simplified solutions to compute foundation stiffness
& c2 Z) [' @+ f- B0 E! e+ d; hand capacity characteristics. The selection of design geotechnical parameters is an
0 r7 N$ q# }  u! ?7 h, oessential component of both design stages, and some approximations for estimating the
1 F0 Y. r! U: y' Tnecessary parameters are summarized.
Typical applications to a case history of a piled raft and to model centrifuge tests
. c# p- C1 c+ }: R' Y' o( \3 s. Vare described, and it is found that the behavior predicted by the simplified analysis is
! g5 Z$ h; H: }$ sbroadly consistent with the measured behavior."
Simplified Design Procedure for Piled Raft Foundations - H.G. Poulos, Fellow, ASCE.rar (677.45 KB, Lượt tải về: 57)

16/5/2011 15:48 Tải lên

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