[国外文献]pil [复制链接]

pile foundations

SUMMARY
A two-parameter model has been proposed previously for predicting the response of laterally loaded single
piles in homogenous soil. A disadvantage of the model is that at high Poisson's ratio, unreliable results may
be obtained. In this paper, a new load transfer approach is developed to simulate the response of laterally
loaded single piles embedded in a homogeneous medium, by introducing a rational stress "eld. The
approach can overcome the inherent disadvantage of the two-parameter model, although developed in
a similar way. Generalized solutions for a single pile and the surrounding soil under various pile-head and
base conditions were established and presented in compact forms. With the solutions, a load transfer factor,
correlating the displacements of the pile and the soil, was estimated and expressed as a simple equation.
Expressions were developed for the modulus of subgrade reaction for a Winkler model as a unique function
of the load transfer factor. Simple expressions were developed for estimating critical pile length, maximum
bending moment, and the depth at which the maximum moment occurs. All the newly established solutions
and/or expressions, using the load transfer factor, o!er satisfactory predictions in comparison with the
available, more rigorous numerical approaches. The current solutions are applicable to various boundary
conditions, and any pile}soil relative sti!ness. Copyright
2001 John Wiley & Sons, Ltd.
KEY WORDS: piles; closed-form solutions; lateral loading; soil}structure interaction

Abstract: Predicting the load–settlement and load–transfer behaviors of rammed aggregate piers are important aspects of design. Use of
advanced engineering models, however, can be complex involving uncertainty in selection of nonlinear constitutive model parameters for
the aggregate and surrounding matrix soils and in selection of in situ stress fields. For purposes of simpler design calculations, this paper
uses the closed-form approximate solution and the boundary-element method using both elastic
i.e., neglecting interface slip and
elastic–plastic soil–pier interface
i.e., considering interface slip to predict load–settlement and load–transfer for rammed aggregate piers.
Unlike previous studies that evaluate load–settlement and load–transfer for stiff, slender piles
e.g., concrete and steel piles or fully
penetrating granular piles, this paper focuses on floating rammed aggregate piers having slenderness ratios
L/D of 3–10 and pier–soil
stiffness ratios
Ep /Es of 5–80. Predictions of load–settlement and load–transfer as a function of depth are compared to three full-scale
instrumented load tests. Based on the calibrated models, equations for predicting load–settlement response and load–transfer as functions
of Ep /Es, and L/D are presented with example calculations.
DOI: 10.1061/
ASCE1532-3641
20066:6
389
CE Database subject headings: Foundations; Piers; Load transfer; Load tests; Stress distribution; Boundary element method;
Aggregates.

非常感谢，谢谢