Special floats are used on very soft ground or in shallow water over soft ground for direct installation of plastic drains. A special plastic material is used for the horizontal drain layer, making conventional sand mats unnecessary.
Improvement using PDF method
- In Combination with Horizontal Drains
Features
- Shortened schedules
Direct vertical drains can be installed from over very soft ground immediately after or during landfill. Compared with land implementation, schedules can be shortened for the overall reclamation process.
- Conventional sand mats not required
Horizontal drain material can substitute for sand mats.
- Implementation possible at lakes and marshy ground
The whole installation system can be transported by land, so implementation is possible at inland lakes or other isolated stretches of water.
- Greater volume of dredged soil can be accepted
Quantities accepted at dredged soil disposal facilities can be increased at low cost, helping to extend life of facility.
- Highly reliable method
The plastic board drain method is a reliable method used for wide-ranging applications, and delivering highly acclaimed improvement effect.
- GPS used
GPS (global positioning system) is used for accurate and speedy positioning.
- Non-vibratory, low noise method
This low noise method does not use a vibratory device and has minimal impact on the surroundings.
- Environment-friendly
This method is environment-friendly, avoiding depletion of natural sand and other resources.