Title

CPTu-based Enhanced UniCone Method for Pile Capacity

Document Type

Article

Publication Date

9-30-2016

Publication Source

Engineering Geology

Volume

212

Inclusive pages

21-34

DOI

http://dx.doi.org/10.1016/j.enggeo.2016.07.010

ISBN/ISSN

0013-7952

Peer Reviewed

yes

Abstract

The UniCone direct piezocone method by Eslami and Fellenius (1997) for evaluating the axial capacity of pile foundations is reviewed and improved means of evaluating the soil resistance factors are recommended. This method uses all three piezocone penetration test (CPTu) readings in a soil behavioral type (SBT) classification chart and provides estimations of axial pile capacity for a wide variety of pile types installed in different assortments of geomaterials. In this paper, the earlier method is improved using a dataset of 153 pile load tests and CPTu soundings from 52 worldwide sites. An alternative soil classification system using the CPT material index Ic is used to provide improved correlations of higher reliability via continuous functions for estimating the side and base capacity components of driven and jacked piles, and drilled shafts. An analysis is also included to test the performance of the newly proposed design formulations. Finally, a simplified flowchart is presented for convenient application of the enhanced expressions.

Keywords

Pile foundation, Piezocone penetration test, Axial pile capacity, Soil classification

Disciplines

Engineering

This document is currently not available here.

  Contact Author

Share

COinS