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
/ c3 J+ Q: k. Imay be possible to enhance the performance of the raft by the addition of piles. The use
) P# }" I3 g5 J2 ?9 z) V' Kof a limited number of piles, strategically located, may improve both the ultimate load
& f9 J& j* I. _/ m& o" V8 h+ ^% b7 }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:
1. The assessment of the overall foundation behavior;
/ ?% k  j* S. Q7 i+ h3 F  _2. The assessment of the behavior under individual column loads.
) \* C6 J1 P% U  x' ?! h. [2 ?/ DIn both cases, use is made of simplified solutions to compute foundation stiffness
8 U$ Q$ T, F5 l8 x. h. Land capacity characteristics. The selection of design geotechnical parameters is an
+ b8 W) d5 w9 v2 [4 s. M# C7 Hessential component of both design stages, and some approximations for estimating the
' ]3 y# L2 z/ q3 ?9 Enecessary parameters are summarized.
Typical applications to a case history of a piled raft and to model centrifuge tests
2 J6 y, r- O9 R' l" w7 I( T. H# B* gare described, and it is found that the behavior predicted by the simplified analysis is
broadly consistent with the measured behavior."
+ m( b) {' t* q  O  b3 }  I 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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