Abstract
The results of SPT measurements performed at five locations in Greece with varying stratigraphy, using manual or automatic hammer release along with ~900 recordings of the impact energy transmitted to the string of rods, are presented. The measured values of energy ratio (ER) and associated uncertainty (standard deviation, σ, and coefficient of variation, COV) are the first to be reported regarding the Greek practice of test. The results were analyzed in terms of hammer release technique, depth, soil type and blow count (NSPT) and they were compared to pertinent published results. It was found that the ER and related uncertainty values depend mainly on the hammer release technique, and the following values are proposed for practical use under soil conditions similar to the ones encountered in the present study: ERman. = 46 ± 3.8% and ERauto = 77 ± 4.6%.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
