In summary, this project comprised the following components:
The area of the sports pitches was accurately levelled with a CAT D5 dozer fitted with laser guided grader system to grade the site and it provided a surface that was level to a tolerance of: + or – 20mm over a 3m straight edge.
Once the area was level the whole area was removed of at least 80% of stones greater than 25mm in the upper 50mm of topsoil. After the initial stone removal, a secondary stone burying operation was completed to bury any remaining stones at least 50mm below the surface. Finally the area was rolled to provide a suitable surface to enable the next operation.
Sand Spreading and final grading
A uniform 20 mm depth of approved sports pitch sand was applied to all of the graded areas. This sand was worked by a trailed grader bar leaving the whole area level ready to receive the drainage system.
This scheme had the following drainage system:
|Installation of 60 mm piped rootzone slits||Linear m||22,640|
|Installation of 100 mm catch-water drain||Linear m||390|
|Installation of 125 mm collector drain||Linear m||270|
|Installation of 150 mm collector drain||Linear m||200|
Cross sections of drains