A critical review of field testing of helical steel piles
A critical review of field testing of helical steel piles
In this paper, an initial appraisal of the existing body of knowledge contained in the records of full-scale axial maintained load tests on helical steel piles (HSP) is presented. There are numerous case studies on full-scale testing of HSP which cover a variety of configurations (no. helices, helix spacing, depth of installation, etc.), ground conditions, testing procedures and definitions of failure. This data base is being critically reviewed by the authors and in this paper, the procedures employed in the review are outlined and illustrated through a selection of the case studies. The review involved examining the time-displacement and time-load data (when available), to confirm the reliability of the test stages from a given test and then applying a uniform failure condition across all studies. It is shown that the short loading stage durations employed in most studies (so-called quick test) and not imposing a creep criterion, especially in the latter stages of the test, means that the ultimate capacity is often overstated. This revised and updated database will be used to critically appraise resistance calculation methods used in practice and develop reliability-based design procedures for HSP that are compatible with Eurocode 7.
P. J. Bourne-Webb; T. M. Bodas Freitas; P. Marques; E. Godinho
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
A - New developments on structural design
Contact Information
- Secretary General - Dr A M McNamara
- Email: [email protected]
- Phone: +44 20 7040 8154
- City, University of London
- Northampton Square
- London EC1V 0HB. United Kingdom