Interpreting Load-Settlement Curves of Pile Foundations by Graphical Methods

Yıl 2017, Cilt: 1 Sayı: 2, 1 - 10, 10.12.2017

M Olgun Y. Yenginar A. Hanati

Öz

In Geotechnical Engineering, deep foundation systems, especially pile foundations, are
typically used when shallow foundations are inadequate due to design criteria in terms of
bearing capacity, settlement, liquefaction and stability. The load settlement behavior of the
pile foundations can be determined realistically by full-scale loading tests conducted on the
piles after the pile construction. In this study, it was tried to determine the ultimate bearing
capacity of the diriven and bored piles manufactured in different soil conditions using the
load-settlement data. For this, 9 different graphical methods such as Tangent, Fuller-Hoy,
Butler-Hoy, De Beer-Wallays, Chin Kondner, Decourt, Brinch Hansen 80%, Mazurkiewicz
and the Corps of Engineers have been used. Among these methods, there are considerable
differences between the predicted ultimate bearing capacities of the piles which decreases to
35% for the piles loaded up/over to the collapse load, and increases up to 120% for the piles
loaded below the failure load. In generally, methods of Brinch Hansen, Mazurkiewicz, Chin
Kondner and Decourt predict the pile capacity greater than maximum test load and the other
ones predict smaller than it. The closest average collapse load was obtained from methods of
Corps of Engineering and Butller-Hoy.

Anahtar Kelimeler

Bearing capacity, field pile loading tests, field pile loading tests

Kaynakça

• ASTM D1143/D1143M-07. 2013. Standard Test Methods for Deep Foundations Under Static Axial Compressive Load. ASTM International, West Conshohocken, PA, 2013, https://doi.org/10.1520/D1143_D1143M
• ASTM D1143-81. 1994. Standard Test Method for Piles Under Static Axial Compressive Load. ASTM International, West Conshohocken, PA, 0, http://www.astm.org/cgibin/resolver.cgi?UOP43
• ASTM D 3689-90. 1995. Standard Test Method for Individual Piles Under Static Axial Tensile Load. ASTM International, West Conshohocken, PA, DOI: 10.1520/D3689- 90R95
• ASTM D 3966-90. 1995. Standard Test Method for Piles Under Lateral Loads. ASTM International, West Conshohocken, PA, DOI: 10.1520/D3966-90R95
• ASTM D3966/D3966M-07. 2013. Standard Test Methods for Deep Foundations Under Lateral Load, ASTM International, West Conshohocken, PA, https://doi.org/10.1520/D3966_D3966M