CLOSURE OF A LATERAL END OF A TUNNEL CHEST, CARRIER OF AT LEAST ONE SEAL RIB WITH SAID TUNNEL CHEST

摘要

The present invention relates to a cheek (100) intended to close an end lateral face (210) of a tunnel box (200), the cheek comprising a closure plate (110) intended to be applied on said face end, extended perpendicularly to an insertion wall (120) provided to fit a recess (E) longitudinally passing through the tunnel box, at its outlet through said end face. According to the invention, at least one rib (124), non-elastic, protrudes outwardly from the insertion wall (120) being arranged parallel to the closure plate (110), said rib extending without discontinuity around the periphery of the insertion wall (120). During the mounting of the cheek on the tunnel box, this rigid rib enters the recess of the tunnel box and forms a barrier to air and moisture. The cost of manufacture and installation is lower than a cheek provided with an elastic seal.