SBDrain
The Prefabricated horizontal drainage(SBD) material that discharges water out of the improved area as a replacement for the sand blanket.
- High quality sand for the sand blanket is not require for the horizontal drainage(SBD).
- The consolidation delay is reduced by using SBDrain.
１.Specification
| Properties | Unit | Specification | Test Method | |
|---|---|---|---|---|
| Dimension | Thickness | mm | 8.0 ± 1.5 | － |
| Width | mm | 300 ± 10 | － | |
| Drain | Compression strength | kN/m2 | > 250 | － |
| Discharge Capacity at straight 100kPa, I = 1.0 | m3/day | > 36 | ASTM D4716 | |
| Filter | Grab Strength | N | > 500 | ASTM D4632 |
| Permeability | m/s | > 1.0×10-4 | ASTM D4491 | |
| Apparent Opening Size, O90 | micron | < 75 | ASTM D4751 | |
2.Characteristics
- The water discharge capability is secured through resisting the embankment pressure.
- SBDrain can adapt to the unevenness of the surface area and maintains the drainage capability during the consolidation settlement.
- SBDrain is designed to connect to attach to PVD easily and firmly.
