Article by Fawad Niazi Appears in Engineering Geology

s00137952The article “CPTu-based enhanced UniCone method for pile capacity” by Fawad Niazi, assistant professor of civil engineering, was published in the September 30, 2016, issue of Engineering Geology.

From the 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.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s