ISO 22477-10:2016 pdf free download.
Reconnaissance et essaisgéotechniques — Essais de structures géotechniques — Partie 10: Essal des pleux: essal de charge rapide.
Before and after each load cycle, the level of the pile head shall be determined relative to a point outside of the minimum reference separation distance by optical levelling. The optical levelling measurements shall be controlled by reference to one or more fixed reference points and should be undertaken to an accuracy of ±1 mm.
The base of a test displacement measuring system (where this is placed on the ground surface) should not be placed closer than the minimum reference separation distance from the pile. This shall be verified at the test site. If the minimum reference separation distance for a test displacement measuring system cannot be reached or vibration-free measurement cannot be undertaken, the test displacement measuring system should be placed on or fixed to a vibration-free surface such as an adjacent pile.
The minimum reference separation distance shall be measured from
— the pile, when the test is undertaken with a launched mass, or
— supporting component of the equipment which is nearest the pile, when the test is undertaken with a failing mass.
The value of the minimum reference separation distance should be a minimum of 15 m and
— equal to or greater than the distance which the shear waves in the soil travel during the duration of the loading (tf), when the test is undertaken with a launched mass, thus rref = c x t1, or
— equal to or greater than the distance which the shear waves in the soil travel during the duration of the falling of the mass (tg) and the subsequent loading (tf), when the test is undertaken with a falling mass, thus rref = Cs X (tg + tf).
The load applied to the pile shall be determined directly by a purpose built calibrated load cell which does not form part of the pile.ISO 22477-10:2016 pdf free download.ISO 22477-10:2016 pdf free download
Tags: Geotechnical investigation and testing
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