Filling drainage or ventilation channels in grass field with sand, comprises laying cover with holes on ground, forming channels in ground underneath and pouring sand onto cover

摘要

A cover (4, 5) containing holes is laid on the ground, then channels (14) are formed in the ground underneath and then sand is poured onto the cover so that it flows through the holes and into the channels underneath. An independent claim is also included for the machine used to carry out this method, comprising a mobile chassis for moving over the grass surface, positioning devices for laying the cover, a storage container (7) for the sand and a feeder (8, 9) for supplying sand to the cover.