Geosynthetic Encased Columns for Soft Soil Improvement

This book deals with "geosynthetic encased columns", a relatively new technique used for the ground improvement of soft soils. The GEC construction technique is well supported by a number of calculation methods and is a suitable substitute for the more traditional stone columns technique, especially when applied to very soft soils.

1 Generalities 1.1 Introduction 1.2 General principles 1.3 Applications (Alexiew and Thomson, 2014) 1.4 Execution methods 1.5 Material properties selection 2 Design methods 2.1 Overview 2.2 Vertical design: "general principles" 2.3 Vertical design: "analytical calculation" 2.4 Vertical design: consolidation analysis 2.5 Vertical design: column layout 2.6 Alternative calculation methods 2.7 Global stability: plane strain analysis 2.8 Final comments 3 Parameters used in pre-design charts and calculation examples 3.1 Introduction 3.2 Limit state design 3.3 Material parameters 3.4 Vertical design: charts utilization 3.5 Calculation examples 4 Instrumented embankments on GEC 4.1 Introduction 4.2 Test embankment at TKCSA, Itaguai, Brazil, 2012 4.3 Other case studies 4.4 Final remarks 5 Application of numerical analyses 5.1 Introduction 5.2 2D axisymmetric analysis 5.3 2D plane strain analysis 5.4 3D strip analysis 5.5 Final remarks Annex I Annex II