MELTON ROSS, NORTH LINCOLNSHIRE
Initial hired operated plant has led to; Landfill capping operation and Principle contractor landfill cell base construction including:-
- Excavation (digging) down to the bottom of the sub-grade.
- Excess material (mostly clay) hauled to on-site stock pile.
- Quarry face dressed with a long reach excavator
- Rock trenches dug.
- clay is re-compacted into 250mm lifts (layers).
- clay packed down with both pad & smooth rollers. Each lift is then tested for optimal moisture and density.
- Cell is smoothed and surveyed.
- Edges of existing liner on adjacent closed cell are exposed and cleaned to join with new liner.
- Plastic cell liner is installed extending up sides of cell (polyethylene).
- Geotextile (permeable fabric) mat laid over the liner to protect it.
- Existing leachate pipe system (8-inch perforated PVC) is extended through new cell. Leachate is the liquid that filters down through the garbage, typically as a result of rain.
- Fines are hauled in and placed over liner and mat to a depth of 150mm on bottom and slopes of cell.
- Temporary berms with rain guards are built around the perimeter.
- The cell was then laid with tyre bails, placed by the use of a ‘forwarder’.
- As the cell is filled, wells built-up to capture leachate.
The biggest challenge of cell construction is usually the weather