Moulding insert and facing block with such an insert

A moulding insert, configured so as to be inserted in a mould for manufacturing a concrete facing block intended for a reinforced-ground structure, said reinforcement-ground structure comprising a facing formed by such facing blocks and a fill in which reinforcements are installed, connected to the facing, the moulding insert comprising:

• a shell, delimiting a general space of a connection connecting a reinforcement to the facing block, said general space opening up while splaying towards a reference plane P defined at a rear surface of the facing,
• a core envelope, obtained by moulding, separately from the shell,
• the shell having a first lateral face pierced with a first orifice, in which a first end portion of the core envelope is fitted,
• characterised in that the core envelope is in the general form of a truncated cone,
• the shell having a second lateral face pierced with a second orifice, in which a second end portion of the core envelope is fitted,
• in which the conicity (α1) of the core envelope is between 1° and 10°, the second orifice is larger than the first orifice.