Publication Abstract

Proceedings - Fifth International Conference & Exhibition on Piling and Deep Foundations, 1994, Bruges, Belgium, (DFI)

A comparison between measured and calculated bearing capacity of piles
C. Cherubini, L. Cucchiararo, T. Iaccarini

The calculation models utilized in Geotechnics are generally "bias affected". This also happens for the evaluation of bearing capacity of piles. A specific method of calculation may then lead to underestimate or overestimate the real bearing capacity. It is possible to define a "Bias Factor" as the ratio between the real bearing capacity (measured) and the calculated one. When many data of calculated bearing capacity and the related measures are available, one can analyze the statistical distribution of such a "Bias Factor". Generally speaking some Authors affirm that such Factor has a statistical lognormal distribution. In this report many data are considered coming from different sites and related to various methods of calculation of pile bearing capacity. The performed analysis of Bias Factor is rather large leading to give each considered calculation method a measure of lesser or greater reliability.

 article #806; publication #36 (IC-1994)