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Tiêu đề: Simplified Design Procedure for Piled Raft Foundations - H.G. Poulos, Fellow, AS [In trang]

Tác giả: AloneGalaxy    Thời gian: 16/5/2011 15:49
Tiêu đề: Simplified Design Procedure for Piled Raft Foundations - H.G. Poulos, Fellow, AS
Abstract
6 P) t. R# q6 g1 [# a! R. j7 E9 T4 v"In situations where a raft foundation alone does not satisfy the design requirements, it% M- C, v9 k; z6 M
may be possible to enhance the performance of the raft by the addition of piles. The use( @; z% a5 @9 a8 ~
of a limited number of piles, strategically located, may improve both the ultimate load' U0 X( g$ G, y6 y$ I9 i, Y  s0 k* T
capacity and the settlement and differential settlement performance of the raft. This
1 }' |9 U* }5 F! Z! X9 q9 qpaper outlines the development of a simplified method of analysis which can provide a
, G: S& A/ Z4 I5 |) y4 Nuseful tool for preliminary design of piled raft foundations. It involves two phases:* t! y2 A0 ?% a, U
1. The assessment of the overall foundation behavior;
2 {, _1 i/ C& X+ A* W) \2. The assessment of the behavior under individual column loads.1 J0 D6 G  {" @0 V. h0 F
In both cases, use is made of simplified solutions to compute foundation stiffness
2 y. A' ~. l* t) I" a+ j, {$ Xand capacity characteristics. The selection of design geotechnical parameters is an' Z1 Y6 H8 `0 x: G+ @- X+ f3 d  {
essential component of both design stages, and some approximations for estimating the2 b$ p, A1 F, d: n6 `
necessary parameters are summarized.
0 F* V+ ?- P/ lTypical applications to a case history of a piled raft and to model centrifuge tests" Q4 S9 i% k8 z- v' [+ t  Z& v
are described, and it is found that the behavior predicted by the simplified analysis is- H9 o! b* l4 a$ B& a' O
broadly consistent with the measured behavior."& n. B3 o  f4 J& M
Simplified Design Procedure for Piled Raft Foundations - H.G. Poulos, Fellow, ASCE.rar (677.45 KB, Lượt tải về: 57) $ Z3 V# z- j/ R7 ^/ p+ P" Z& \7 d5 S





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