One of the most important aspects for natural grass sports field construction is designing the field for maximum drainage of excess moisture from rainfall prior to and/or during an event. If fields are constructed without any kind of underground drainage system and they do not have an adequate crown to remove excess moisture from the field rapidly, the topsoil on the field becomes saturated. The water will do one of two things; pond or run-off. In most cases the water starts ponding because there is little or no crown on the field. Playing games when the soil is saturated will cause severe damage to the field and will increase the amount of soil compaction, which will only make the drainage problem within the field worse.
The drainage machine used for installing sportsfield drainage is the Mastenbroek 15/15 or the Mastenbroek 10/12 for smaller jobs. Both machines are equipped with a side discharge conveyor belt. The excavated soil is lifted on to the conveyor belt for easy discharge into a tipper driving alongside the drainage machine. This ensures that playing surfaces are disrupted as little as possible.
When drainage is installed with a backfill of aggregate and sand, the sandfiller is used to fill the trenches with sand to the surface. Sand is placed directly in the trench whilst the 2 sets of springloaded wheels on the sandfiller ensures that the sand is compacted in the trench, and the roller at the back of the sandfiller gives thesand a final compaction.
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