BS EN ISO 22477-4:2018
$198.66
Geotechnical investigation and testing. Testing of geotechnical structures – Testing of piles: dynamic load testing
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 62 |
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 EN1997‑1:2004+A1:2013:
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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;
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pile driving formulae – evaluation of pile compressive resistance from blow counts and hammer energy during pile driving;
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wave equation analysis – evaluation of pile compressive resistance from blow counts by modelling of the pile, soil and driving equipment;
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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.
NOTE 1 ISO 22477‑4 can be used in conjunction with EN1997‑1:2004+A1:2013. Numerical values of partial factors for limit states from pile load tests to be taken into account in design are provided in EN 1997‑1. For design to EN 1997‑1 the results from dynamic load tests will be considered equivalent to the measured compressive resistance Rc,m after being subject to appropriate analysis.
NOTE 2 Guidance on analysis procedures for dynamic load testing results is given in Annexes A, B, D, E and F.
This document provides specifications for:
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investigation tests, whereby a sacrificial pile is loaded up to ultimate limit state;
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control tests, whereby the pile is loaded up to a specified load in excess of the serviceability limit state.
NOTE 3 Generally, an investigation test focuses on general knowledge of a pile type; a control test focuses on one specific application of a pile.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 4 | European foreword Endorsement notice |
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope |
| 10 | 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions |
| 12 | 3.2 Symbols 4 Testing equipment 4.1 General |
| 13 | 4.2 Loading 4.2.1 General |
| 14 | 4.2.2 Loading by an impact driving system 4.2.3 Loading by a single or multiple blow drop mass 4.3 Measurements 4.3.1 General |
| 15 | 4.3.2 Measurements for dynamic impact tests |
| 16 | 4.3.3 Measurements and recordings required for pile driving formula or wave equation analysis |
| 17 | 5 Test procedure 5.1 Preparation for testing 5.2 Safety requirements 5.2.1 People and equipment in the surrounding area |
| 18 | 5.2.2 Test pile 5.3 Preparation of the pile 5.4 Timing of tests 5.4.1 General 5.4.2 Driving — Continuous monitoring and end of initial driving test 5.4.3 Re-driving |
| 19 | 5.4.4 Bored or cast-in-situ piles 6 Test results 6.1 Test results for dynamic load test with driving formula 6.2 Test results for dynamic load test with wave equation analysis 6.3 Test results for dynamic load test with measurements at the pile head |
| 20 | 7 Test reporting |
| 22 | Annex A (informative) Driving formula |
| 25 | Annex B (informative) Wave equation analysis |
| 35 | Annex C (informative) Examples of transducer attachment and pile extension details |
| 37 | Annex D (informative) Evaluation by closed form solutions using empirical damping values |
| 44 | Annex E (informative) Evaluation of the measurements by signal matching |
| 52 | Annex F (informative) Multi-blow dynamic testing technique |
| 59 | Bibliography |
