Publication Abstract

Proceedings - Fourth International Conference - Piling and Deep Foundations, 1991, Stresa, Italy, (DFI)

Interpretation of Sonic Coring results: A research project
R.T. Stain & H.T. Williams Testconsult CEBTP Ltd, UK

Sonic coring or Ultrasonic Logging is one of the earliest methods of checking the integrity of cast-in-place piles, caissons and diaphragm wall panels. The technique was developed in the late 60's, it's first application in the UK being described by Levy. In 1975, Paquet and Briard reported Sonic Coring results obtained on a series of trial shafts that had been constructed with known included anomalies. Since then, little or no experimental work in this field has been reported despite the widespread and extensive use of this method. This paper describes the results obtained from controlled tests carried out in the laboratory. Four case histories are presented, one from a S.E.R.C. research project and three from UK Construction sites.

 article #530; publication #37 (IC-1991-IT)