Tool for the in situ construction of a sandwich wall, and method applying same

A method for manufacturing a wall (1) with two concrete walls (2, 3), between which at least one insulation panel (4) is trapped, the two concrete walls (2, 3) being manufactured simultaneously or substantially simultaneously by pouring concrete between the insulation panel (4) and a first form panel (6), and between the insulation panel (4) and a second form panel (7), the form panels (6, 7) being disposed on either side of the insulation panel (4), a first reinforcement (51) being placed on a side of the inner face of the first form panel (6), the insulation panel (4) being held between the two form panels (6, 7), before pouring the concrete, using positioning systems (8) passing through the insulation panel (4) and bearing on inner faces of the form panels (6, 7), the positioning system (8) comprising:

• a dagger (10) having a rod (12) provided with a bearing stop (13) and,
• a lock (11) provided with a counter-stop (16), the method being characterized by:
• placing on each insulation panel (4) before positioning thereof, positioning systems (8), each positioning system (8) including at least two notches (17) for receiving the first reinforcement (51), the at least two notches being delimited by retaining stops (18), said retaining stops (18) being spaced apart so as to maintain in position the first reinforcement (51), and extending between a first end (121) of the rod (12) and the counter-stop (16), the at least two notches defining a housing with a profile converging in an opposite direction to a housing opening and arranged along the positioning system (8), and
• positioning each insulation panel (4) with passage of the positioning systems (8) through the first reinforcement (51),
• the at least two notches (17) through which the first reinforcement (51) can be maintained allowing a positioning of the first reinforcement (51).