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Nondestructive Testing of Deep Foundations. Bernard Hertlein, Allen Davis

Contents:

FOREWORD.
PREFACE.

ABOUT THE AUTHORS.

 

 

1. INTRODUCTION AND A BRIEF HISTORY.

 

1.1Introduction.

1.2 A Brief History of Deep Foundations and the Advent of NDT.

1.3 Deep Foundation Failures and ND.

1.4 Deficiencies in Existing Foundations.

2. Deep Foundation Construction Methods.

2.1 Driven Piles – Timber, Steel and Concrete.

2.2 Caissons and Drilled Shafts.

2.3 Diaphragm Walls, Cut-off Walls and Barrettes.

2.4 Augured, Cast-in-place Pile.

2.5 Micropiles or Minipiles.

2.6 Stone Columns and other Soil Improvement Techniques.

3. HOW SOILS AFFECT THE CHOICE OF FOUNDATION.

4. TRADITIONAL, VISUAL AND NEW INSPECTION METHODS  FOR DEEP FOUNDATION CONSTRUCTION.

4.1 Driven Piles.

4.2 Augured Cast-in-place Piles.

4.3 Drilled Shafts.

4.4 The Inspector’s Role.

5. A REVIEW OF FULL-SCALE LOAD-TESTING TECHNIQUES.

5.1Static Load-test Techniques – Axial Compression.

5.2 Static Load-test Techniques – Axial Tension.

5.3 Static Load-test Techniques – Lateral.

6. HIGH-STRAIN TESTING FOR CAPACITY AND/OR INTEGRITY.

6.1 High-strain Dynamic (Drop-weight) Testing of Driven Piles.

6.2 High-strain Testing of Drilled Shafts and Augered,Cast-in-place Piles.

6.3 Modification of Shaft Head for High-strain Tests.

6.4 Practical Considerations for Drop-weight Techniques.

6.5 HSDT Alternatives.

6.6 Limitations of High-strain Dynamic Testing.

7. LOW-STRAIN SURFACE TESTS – SONIC ECHO.

7.1 Sonic Echo (Impulse Echo).

8. SONIC MOBILITY (IMPULSE RESPONSE).

8.1 Principles of Impulse–Response Curve Interpretation. 

8.2 Practical Considerations.

8.3 Classification of Signal Responses.

8.4 Pile Simulation Techniques.

8.5 Time Domain–Velocity Reflectors.

9. THE IMPEDANCE-LOG ANALYSIS.

10. LOW-STRAIN DOWN-HOLE TESTS.

10.1 Introduction.

10.2 Cross-Hole Sonic Logging.

10.3 Cross-Hole Tomography. 

10.4 Single-Hole Sonic Logging.

10.5 Gamma–Gamma Logging. 

10.6 Parallel Seismic Testing.

11. FIELD MOCK-UPS OF DEEP FOUNDATIONS: CLASS-A PREDICTIONS.

12. THE RELIABILITY OF PILE SHAFT INTEGRITY TESTING.

12.1 Statistical NDT Sampling Schemes.

12.2 Methodology Reliability.

13. CURRENT RESEARCH.

13.1 Developments in Measurements and Analysis.

13.2 Electrical Methods.

13.3 Optical Techniques.

13.4 Guided Wave Analysis.

13.5 Statistical Analysis.

13.6 Self-consolidating Concrete. 

13.7 Acceptable Vibration Levels.

13.8 Automated Monitoring Systems.

13.9 Wireless Acquisition Systems. 

13.10 Smart’ Structures.

14. THE PLACE OF NONDESTRUCTIVE TESTING AT THE BEGINNING OF THE 21ST CENTURY.

14.1 Nondestructive Testing and Load and Resistance Factor Design.

14.2 Setting Up an Effective Quality Management Program. 

14.3 Who’s Testing the Tester?. 

14.4 Acceptance Criteria.

14.5  Evaluating Defects.

APPENDIX I. STRESS-WAVE PROPAGATION IN CYLINDRICAL STRUCTURES.

Unknown Mechanical Impedance at its Base.

APPENDIX II. CONTACT ADDRESSES.

APPENDIX III. STANDARDS REFERRED TO IN THIS BOOK.

APPENDIX IV. SAMPLE SPECIFICATIONS FOR NDT METHODS FOR DEEP FOUNDATIONS.

REFERENCES.

INDEX.

  назад 

 

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