Using standard PDA testing to estimate the lateral capacity of concrete piles in medium loose to dense sand

Document Type

Conference Proceeding

Publication Date

1-1-2019

Abstract

Driven piles used in the foundations of earthquake resistant structures are typically designed to sustain horizontal shear loads together with excessive axial loads. Moreover, it is frequent to use the equivalent static load analysis in piles design. However, in contrast to vertically loaded piles, laterally loaded piles behavior has different characteristics. Such characteristics include that the soil-pile interaction is more complex, as well as the demand that the soil-pile system must respond elastically. As a result of that, it can be figured out that the lateral capacity of the pile depends on the soil properties, the geometrical and material properties of piles, such as the pile stiffness, embedded depth, and the horizontal allowable displacement. Furthermore, in-situ static and dynamic pile tests indicate that the lateral capacity of piles results from the comprehensive behavior of various factors described above. Based on such complexity of modeling the problem, it may be beneficial to use field tests results such as PDA tests and CAPWAP analysis to give a close estimate to the actual piles lateral capacity. Such results can act as proof testing, confirming that the expected capacities assumed in design are in fact available in the field. Thus, based on accumulative results of PDA-CAPWAP tests in different types of soil for different types of piles and by modeling the soil pile-system and asymptotically loading laterally till critical displacements are achieved, a stochastic equation is derived to correlate the piles lateral capacities to available geotechnical information and PDA-CAPWAP tests. This is based on the assumption that the resistance to penetration can be divided into lateral and vertical components.

Identifier

85079102506 (Scopus)

ISBN

[9786188284456]

Publication Title

Compdyn Proceedings

External Full Text Location

https://doi.org/10.7712/120119.7202.18885

ISSN

26233347

First Page

3993

Last Page

4008

Volume

3

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