Behavior of a large diameter bored pile in drained and undrained conditions: Comparative analysis

Mohamed Ezzat Al‐atroush, Ashraf Hefny, Yasser Zaghloul, Tamer Sorour

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Despite the difficulties in obtaining the ultimate capacity of the large diameter bored piles (LDBP) using the in situ loading test, this method is the most recommended by several codes and design standards. However, several settlement‐based approaches, alongside the conventional capacity‐based design approach for LDBP, are proposed in the event of the impossibility of performing a pile‐loading test during the design phase. With that in mind, natural clays usually involve some degree of over consolidation; there is considerable debate among the various approaches on how to represent the behavior of the overconsolidated (OC)stiff clay and its design parameters, whether drained or undrained, in the pile‐load test problems. In this paper, field measurements of axial loaded to failure LDBP load test installed in OC stiff clay (Alzey Bridge Case Study, Germany) have been used to assess the quality of two numerical models established to simulate the pile behavior in both drained and undrained conditions. After calibration, the load transfer mechanism of the LDBP in both drained and undrained conditions has been explored. Results of the numerical analyses showed the main differences between the soil pile interaction in both drained and undrained conditions. Also, field measurements have been used to assess the ultimate pile capacity estimated using different methods.

Original languageEnglish
Article number261
Pages (from-to)1-19
Number of pages19
JournalGeosciences (Switzerland)
Issue number7
Publication statusPublished - 2020


  • Drained and undrained conditions
  • Failure mechanism
  • Finite element method
  • Large diameter bored pile
  • Load transfer
  • Overconsolidated stiff clay
  • Two dimensional axisymmetric

ASJC Scopus subject areas

  • General Earth and Planetary Sciences


Dive into the research topics of 'Behavior of a large diameter bored pile in drained and undrained conditions: Comparative analysis'. Together they form a unique fingerprint.

Cite this