Method for the construction and sustainable management of a hybrid turf sports ground with water table and hybrid turf sports ground

Method for the construction and management of a hybrid turf sports field characterized:

• in that it comprises a first step for constructing a structure (S) placed on a base (F), the said structure comprising N stacked porous layers (Ci), N ≥1, the lower layer (CN) being erected first on the base (F) and each (Ci) being then placed on the layer (C1+1) up to the top layer (C1) which is comprised between the surface of zero depth (Yo = 0) and the bottom of the layer (C1) at the depth Y1, all layers being comprised between the depth Yi-1 of the base of the next higher layer (Ci-1), if > 1, or Yo, if i=1, and the depth Yi of the base of the layer (Ci);
• in that the method comprises a second step of installing turf on the surface of the top layer (C1), said installation of said turf being carried out by sowing seeds, once said top layer (C1) has been placed in its definitive position during said first step, or can be carried out beforehand by pre-cultivating said grass on a layer of substrate which is then cut into a partition of sub-elements each comprising a volume of substrate of the same thickness with the turf pre-cultivated on its surface and the roots installed therein, these sub-elements being transported and then finally gathered and placed in order to finalize the construction of said structure (S);
• in that there is at least one hybrid layer (H) among the N layers, consisting of either
• (i) a cultivation substrate which comprises synthetic reinforcing elements or
• (ii) of a cultivation substrate which shares the space of the hybrid layer (H) with synthetic reinforcing elements;
• in that said method comprises a step to manage the depth (Ppiezo) of the piezometric level of the water table inside the structure (S), to allow for good hydration of the turf using capillary flow from said water table.