A SPORT-TECHNICAL LAYER FOR USE IN AN ARTIFICIAL LAWN SYSTEM, AS WELL AS SUCH AN ARTIFICIAL LAWN SYSTEM

The invention relates to a sport-technical layer for use in an artificial lawn system in particular intended for sports fields, which artificial lawn system is built up at least of a substrate to which artificial grass fibres are attached as well as the sport-technical layer extending under said substrate, which sport-technical layer comprises at least one damping sublayer made of a synthetic foam, which damping sublayer made of a synthetic foam is built up of an essentially rigid flat plate, which plate is provided with flatness-enhancing means. The invention further relates to an artificial lawn system provided with such a sport-technical layer. According to the invention, the sport-technical layer is to that end characterised in that said flatness-enhancing means comprise at least one first slot assembly of at least two closely spaced slots formed in a respective upper surface or bottom surface of the plate, which slots extend in a first direction of the plate. As a result, the sport-technical layer is constructionally guaranteed to be a flat layer not exhibiting any warped or overlapping portions. On the one hand this leads to improved functional characteristics of the artificial lawn system to be ultimately constructed, but in addition this prevents the unnecessary work and expenses involved in repairing a non-level sport-technical layer, which currently takes place with the artificial lawn system according to the prior art. L'invention porte sur une couche à propriétés techniques sportives destinée à être utilisée dans un système de gazon artificiel, en particulier destinée à des terrains de sport. Le système de gazon artificiel est constitué d'au moins un substrat auquel sont fixées des fibres de gazon artificiel; et, sous le substrat, d'une couche à propriétés techniques sportives qui comporte au moins une sous-couche d'amortissement en mousse synthétique constituée d'une plaque plate sensiblement rigide munie de moyens d'amélioration de la planéité. L'invention porte en outre sur un système de gazon artificiel comportant une telle couche à propriétés techniques sportives. Selon l'invention, la couche à propriétés techniques sportives est caractérisée en ce que les moyens d'amélioration de la planéité comprennent au moins un premier ensemble de fentes composé d'au moins deux fentes étroitement espacées formées dans une surface supérieure respective ou une surface inférieure respective de la plaque et s'étendent dans une première direction de la pla