|   |   | Preface and acknowledgements |   |   | 
| 1 |   | An overview of deep soil improvement by vibratory methods |   | 1 | 
| 2 |   | A history of vibratory deep compaction |   | 5 | 
| 2.1 |   | The vibro flotation method and first applications before 1945 |   | 5 | 
| 2.2 |   | Vibro compaction in post-war Germany during reconstruction |   | 14 | 
| 2.3 |   | The "Torpedo" vibrator and the vibro replacement stone column method |   | 17 | 
| 2.4 |   | Development of vibro compaction outside Germany |   | 19 | 
| 2.5 |   | Method improvements |   | 26 | 
| 2.6 |   | Design aspects |   | 29 | 
| 3 |   | Vibro compaction of granular soils |   | 31 | 
| 3.1 |   | The depth vibrator |   | 31 | 
| 3.2 |   | Vibro compaction treatment technique |   | 36 | 
| 3.2.1 |   | Compaction mechanism of granular soils |   | 36 | 
| 3.2.2 |   | Vibro compaction in practice |   | 41 | 
| 3.3 |   | Design principles |   | 45 | 
| 3.3.1 |   | General remarks |   | 45 | 
| 3.3.2 |   | Stability and settlement control |   | 50 | 
| 3.3.3 |   | Mitigation of seismic risks |   | 57 | 
| 3.4 |   | Quality control and testing |   | 73 | 
| 3.5 |   | Suitable soils and method limitations |   | 76 | 
| 3.6 |   | Case histories |   | 80 | 
| 3.6.1 |   | Vibro compaction for a land reclamation project |   | 80 | 
| 3.6.2 |   | Ground improvement treatment by vibro compaction for new port facilities |   | 83 | 
| 3.6.3 |   | Vibro compaction field trial in calcareous sand |   | 84 | 
| 3.6.4 |   | Foundation of a fuel oil tank farm |   | 89 | 
 |   | More... |   |  |