Features: - First reference handbook dedicated to the use of soil mix as structural elements for the construction of earth-water retaining structures and cut-off walls. - Establishes the link between the functional requirements, the design and the quality control of the final soil mix structure. - A methodology is proposed for the design of the soil mix walls for which the interaction between steel and soil mix can possibly be taken into account dependent upon the application. - Each potential function of the soil mix wall is described (e.g. earth retaining wall, cut-off wall, bearing capacity, etc.) and the temporary or permanent character of the application (its lifetime) is always considered with regard to its durability. - The design methodology presented in this handbook is in agreement with the Eurocodes. Summary: For several decades now, the deep mixing method has been used for ground improvement works. A more recent application is the use of soil mix as structural elements for the construction of earth-water retaining structures and cut-off walls. Since 2000, due to the economic and environmental advantages of the method, these particular applications have shown an amazing growth. Nevertheless, in practice, no pragmatic standards or guidelines were available for the design, the execution, the quality control and the maintenance of this kind of applications. This is the reason why the present publication was initiated.