When it comes to using reinforcements to grant better mechanical performance to soils, geosynthetics, one of the newest groups of building materials, have become mandatory in almost all works of infrastructure, draining applications, waterproofing, paving, erosion control and soil reinforcement. This book describes a rational design method for reinforced soil retaining structures. The concepts are presented in a didactic manner with theoretical rigor, fulfilling the practical needs of engineers involved in design, construction and inspection of reinforced soil structures. Intended for those who wish to design and build retaining walls and steep slopes on geosynthetically-reinforced soil, this book reveals the basic mechanisms associated with soil-reinforcement interaction.