ÖNORM EN ISO 22477-4

This document establishes the specifications for the execution of dynamic load tests in which a single pile is subject to an axial dynamic load in compression. This document outlines the methods of testing required to allow assessment of pile resistance to be determined from the following methods and procedures described in EN 1997-1:2004+A1:2013: a) dynamic impact testing – determination of pile compressive resistance by evaluation of measurements of strain and acceleration and or displacement at the pile head with respect to time; b) pile driving formulae – evaluation of pile compressive resistance from blow counts and hammer energy during pile driving; c) wave equation analysis – evaluation of pile compressive resistance from blow counts by modelling of the pile, soil and driving equipment; d) multi-blow dynamic testing – evaluation of pile compressive resistance from a series of blows designed to generate different levels of pile head displacement and velocity. This document is applicable to piles loaded axially in compression. This document is applicable to all pile types mentioned in EN 1536, EN 12699 and EN 14199. The tests considered in this document are limited to dynamic load tests on piles only. This document provides specifications for: i) investigation tests, whereby a sacrificial pile is loaded up to ultimate limit state; ii) control tests, whereby the pile is loaded up to a specified load in excess of the serviceability limit state.