Arrangment for adjusting moisture content of the soil of a sports field

Abstract

Arrangement for adjusting the soil moisture of a sports field, the structure (S) of which contains a field surface (P), a tread layer ( 9 ) below the field surface (P), and a support layer (T) formed below the tread layer ( 9 ), and the tread layer ( 9 ) is separated from the support layer (T) by a separating layer (V), a network of drainage pipes ( 6 ) is arranged in the support layer (T) and connected to a pool (M), and the support layer (T) is lying on a waterproof film ( 4 ). The basin (M) is provided with a filling valve ( 26 ) and a sluice opening ( 13 ) the lower flow level (A) of the latter is arranged below the upper level of lower crushed stone layer (A).

1 . An arrangement for adjusting the soil moisture of a sports field, the structure (S) of which contains a field surface (P), a tread layer ( 9 ) below the field surface (P), and a support layer (T) formed below the tread layer ( 9 ), and the tread layer ( 9 ) is separated from the support layer (T) by a separating layer (V), a network of drainage pipes ( 6 ) is arranged in the support layer (T) and connected to a pool (M), and the support layer (T) is lying on a waterproof film ( 4 ), wherein the separating layer (V) is formed of a geogrid ( 8 ), and the support layer (T) contains an upper crushed stone layer ( 2   b ) and a coarser, lower crushed stone layer ( 2   a ) connected to it from below, and between the upper crushed stone layer ( 2   b ) and the geogrid ( 8 ) a geotextile ( 8   a ) is arranged, and the film ( 4 ) are folded over the edges of the field surface (P) above the field surface (P), and between the geotextile ( 8   a ) and the foil ( 4 ) a geogrid strip ( 22 ) coated with a geotextile material is arranged, and the geotextile material is in contact with the geotextile ( 8   a ) plate, and the basin (M) is provided with a filling valve ( 26 ) and a sluice opening ( 13 ) the lower flow level (A) of the latter is arranged below the upper level of lower crushed stone layer (A). 
     
     
         2 . The arrangement according to  claim 1 , wherein a drain pipe ( 6 ) is connected to a collecting pipe ( 7 ) connecting the basin (M) and the drain pipe ( 6 ). 
     
     
         3 . The arrangement according to  claim 2 , wherein the lowest level of the collecting pipe ( 7 ) is arranged below the lower flow level (A). 
     
     
         4 . The arrangement according to  claim 3 , wherein the upper crushed stone layer ( 2   b ) is made of crushed stone with a grain size of 4 to 11 mm. 
     
     
         5 . The arrangement according to  claim 4 , wherein the lower crushed stone layer ( 2   a ) is made of crushed stone with a grain size of 11 to 22 mm. 
     
     
         6 . The arrangement according to  claim 5 , wherein the basin (M) is divided into a smaller first chamber ( 11 ) and a larger second chamber ( 12 ), and the chambers ( 11 ,  12 ) are connected by means of the sluice opening ( 13 ), and the collecting pipe ( 7 ) is connected to the first chamber ( 11 ). 
     
     
         7 . The arrangement according to  claim 6 , wherein the second chamber ( 12 ) is provided with an overflow opening ( 23 ) with a lower flow level (B) arranged at a level lower than the lower flow level (A) of the sluice opening ( 13 ). 
     
     
         8 . The arrangement according to  claim 7 , wherein the filling valve ( 26 ) is arranged to open into the second chamber ( 12 ), and the two chambers ( 11 ,  12 ) are connected by means of a pipe ( 14   a ) connected to the submersible pump ( 14 ) located in the second chamber ( 12 ), and a water level sensor ( 16 ) is arranged in the first chamber ( 11 ). 
     
     
         9 . The arrangement according to  claim 8 , wherein the pool (M) is equipped with an automatic control means ( 15 ) to which a remote-controlled sluice (Z) for operating the sluice opening ( 13 ), the submersible pump ( 14 ), the water level sensor ( 16 ) and the remote-controlled filling valve ( 26 ) are connected. 
     
     
         10 . The arrangement according to  claim 1 , wherein the field surface (P) is the surface of the tread layer ( 9 ). 
     
     
         11 . The arrangement according to  claim 1 , wherein the field surface (P) is a lawn mat comprising lawn species planted in a layer of soil arranged on the tread layer ( 9 ). 
     
     
         12 . The arrangement according to  claim 1 , wherein the field surface (P) is a synthetic grass layer arranged on the tread layer ( 9 ).