InhaltsangabePreface Notation 1 Introduction 1.1 What is ground improvement and when and why is it necessary? 1.2 Techniques of ground improvement 1.3 Why do we need to estimate ground deformations? 1.4 What is this book all about? 1.5 References 2 Modelling Soft Clay Behaviour 2.1 Introduction 2.2 Initial stiffness and undrained shear strength 2.3 Modelling the embankment construction process 2.4 Effect of large deformations on embankment stability 2.5 Buoyancy effects due to large deformation 2.6 Summary 2.7 References 3 Vertical Drains 3.1 Consolidation theory for prefabricated vertical drains 3.2 Parameter determination 3.3 Optimum PVD installation depth 3.4 Twodimensional modelling of PVDimproved soil 3.5 Modelling a large scale laboratory test 3.6 Application to a case history 3.7 Summary 3.8 References 4 Vacuum Consolidation 4.1 Introduction 4.2 Field methods for vacuum consolidation 4.3 Theory of consolidation due to vacuum pressure 4.4 Characteristics of vacuum consolidation 4.5 Optimum PVD penetration depth 4.6 Estimating deformations induced by vacuum pressure 4.7 Deformations associated with the vacuum-drain method 4.8 Summary 4.9 References 5 Soilcement Columns 5.1 Introduction 5.2 Settlement predictions 5.3 Degree of consolidation 5.4 Settlement - time curve 5.5 Deformations induced by column installation 5.6 Summary 5.7 References 6 Concluding Remarks 6.1 What else needs to be done? 6.2 Hybrid soft ground improvement techniques 6.3 References Index

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