The design of MSE walls using geosynthetics in France. Present state of the art, and possible future evolution?

摘要

A standard for the design of MSE structures reinforced by geosynthetics is going to be issued in France. As a distinctive feature, it specifies an at-failure displacement mode of calculation taking into account the extensibility of the reinforcements and their progressive interaction with the fill. Questions which may still be raised regarding the validity of the model and the nature of the ultimate limit state are discussed, as well as the possibility of being sometimes less conservative for the tensile capacity of the reinforcements. Moreover a suggestion is made concerning a preliminary design based on the in-service behaviour of the structures.