Construction element for creating a tunnel, tunnel comprising such an element and methods for constructing such an element and such a tunnel

摘要

Construction element for creating a tunnel, comprising a first, incompressible layer (6) of concrete and a second, compressible layer (7) fixed to the first layer (6) so as to form a one-piece prefabricated construction element designed to be incorporated into a tunnel section during the creation of the tunnel, the second layer (7) having a plurality of devices (8), each having a solid body (9) incorporating an empty space (10).