A civil engineering structure, intended for ensuring protection against impacts of moveable masses, has a face exposed to the impacts of moveable masses. The structure includes, in the region of the face exposed to the impacts of moveable masses, a set of individual construction elements secured to one another and filled completely or partially with at least one material having a capacity for being deformed elastoplastically, the individual construction elements liable to be damaged by impacts of moveable masses being capable of being replaced individually by similar individual construction elements.