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The tools developed in the design of retaining structures focus mainly on aspects of design and stability analysis of the structural components. We propose in this paper the construction of an information base that serves not only to calculate conventional retaining structures, but can also help in the selection of the optimal type of structure, best suited to the economic and environmental situation of a project. For this purpose, we begin firstly by a general patterning of retaining structures, and then, we conduct a systematic analysis of the retaining structures built in its environment, to detect any kind of existing interaction and interrelation. Structuring and formalizing the derived information is the last step of this work. We present in this paper only an information base that eliminates the bad retaining structures related to the project context.

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The objective of this work is an analysis of the use of high performance concrete and it impact on the morphology and structure costs. The use of high performance concrete (HPC) in the construction of buildings and civil engineering works offers advantages in terms of durability, ease of implementation, reduction of deformation and shrinkage, increase the resistance of reinforced concrete structures. The economic benefits of the use of high performance concrete, compared to conventional concrete are illustrated by the reduction of the following costs: the implementation of concrete, the geometric sections of bearing elements of the built space and the maintenance of structures. The cost of high performance concrete, for the resistance inferior to 80 Mpa, gives a significative advantage comparatively to the steel and the ordinary concrete. The generalized use of this type of concrete in many countries has been stimulated by a national plan.

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