Displacement of piles from pressuremeter test results - a summary of French research and practice

Abstract

This paper presents the ‘load-transfer functions’ t-z and p-y methods for determining the axial and lateral displacements of single piles. They are based on the results of pressuremeter tests. The methods from the results of the Ménard pre-borehole pressuremeter tests (MPM) and the self-boring pressuremeter tests (PAF, for Pressiomètre AutoForeur in French) are described. Especially, the t-z and p-y methods derived from the MPM test results are commonly used in the French practice. For both t-z and p-y curves, some theoretical background (usually FEM calculations in linear elasticity) is given. The results of the t-z and p-y analyses are compared to the measurements from loading tests on full scale piles. A proposal concerning barrettes is also presented.

Modified Interaction Method for Response of Group Piles Considering Pile–Soil Slip

“…In the proposed initial model, the initial shear stiffness is proportional to the Menard modulus (E M ) and inversely proportional to pile radius (r). However, the proposed model does not consider the type of pile and considers only two types of soil, namely cohesive soils and granular soils [17].…”