With constantly increasing demands on sports turf in the leisure and professional sectors, optimum pitch or playing surface condition is paramount. Intensive drainage is considered to be an important measure taken to both enhance turf condition and cope with today’s demands. In this process, drains are installed with Whizz Wheel Trencher and spoil is simultaneously removed from site.
The drains are installed at a nominal depth of 300 mm and are back-filled with washed free draining aggregate. A choice of drain widths is available, ranging from 50 mm to 150 mm. The major advantage of sand slitting is the installation of a drainage network with minimum damage/disruption to the playing surface. Trenched drains produce effective water catchment channels, drawing in water from both the surface and sub layers.
Sand grooving is particularly useful in areas which receive heavy usage or where surface capping has reduced drainage capacity.
This is a method of cutting narrow channels 200 mm apart and filling them with drainage sand. These slits are cut to a depth of 100 mm x 20 mm wide and back-filled in one pass. This grooving has great benefits in reducing surface ponding between slit drains. It also re-opens existing drainage systems, connecting them with the surface.
This is the installation of closely spaced gravel drains into the top-soil layers.
The gravel banding process relieves surface panning through the insertion of closely spaced gravel slots. Drain spacing varies from 0.4 metres to 2.0 metres, depending on soil composition. Once installed, the gravel bands will intersect existing primary drainage systems, thus allowing the surface to drain more effectively. No spoil is removed in the process, resulting in minimum disruption to the playing surface. After installation, the pitch can be used a lmost immediately.
The Whizz Wheel is capable of both digging and grading lateral drains in widths ranging from 50 mm to 150 mm and up to a depth of 650 mm. The Trencher excavates drain and simultaneously removes spoil off location. This prevents the spoil contacting the playing surface and leaves drain surround clean.
Over time, the build-up of rotten vegetation and other decaying matter on the playing surface can cause water retention. This acts like a sponge. Water congregates in the upper layers of ground makeup and cannot freely drain to the system below. Surface removal removes this spongy layer. The dry ground that is now exposed is free draining and, after grass regeneration, will act as the new playing surface.