Construction of The Load-Transfer Curves for Piles in Sand as a Function of The Standard Penetration Test

Bouafia, Ali; Laouedj, Abdesselem

doi:10.37650/ijce.2024.180201

	Construction of The Load-Transfer Curves for Piles in Sand as a Function of The Standard Penetration Test
Iraqi Journal of Civil Engineering
Volume 18, Issue 2, December 2024, Pages 1-14 PDF (896.55 K)
Document Type: Research Paper
DOI: 10.37650/ijce.2024.180201
Authors
Ali Bouafia^* ¹; Abdesselem Laouedj²
¹University of Saad Dahleb at Blida
²National Marine Science and Coastal Planning School University, Algiers, Algeria
Abstract
In this paper, a practical method of analysis of the pile displacements is proposed on the basis of the theory of load-transfer curves widely used in pile design and analysis. The parameters of the load-transfer curves for piles under axial load (called t-z, q-z curves) or lateral load (called P-Y curves) were correlated with the number of blows Nspt measured during the standard penetration test (SPT). Well documented case histories of full-scale axial or lateral loading tests on single piles in sand were collected, and the analysis of the experimental results led to define the parameters of the load-transfer curves. Two practical methods of computation of a single pile under an axial load or a lateral load were proposed to be used within the scope of a pile foundation project. At last, a validation process of the load-transfer curves was undertaken by direct comparison of the predicted pile displacements to those measured during other pile loading tests, which showed a good predictive capability of the two proposed methods
Keywords
Piles; P-Y curves; Sand, Settlement; Loading test

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