Crushed earth is spread over a compacted soil surface to a height of 15 cm. Number 4 gravel is laid on the spread gravel to fill the ground, with a height of 10 cm, and then compacted by rolling. Synthetic felt is placed on the compacted surface, followed by the laying and adhesive fixing of a carpet. To complete the assembly, SBR granules and sand are evenly distributed per square meter on the carpet.