Low vibration, low noise implementation possible close to existing structures
The gravel drain method is a countermeasure against liquefaction that can be implemented close to existing structures or in urban environments where vibration or noise are a concern. Forming gravel piles in sandy ground shortens horizontal draining distance and prevents liquefaction by stopping the rise in pore water pressure that occurs during earthquakes.
- Low vibration, low noise method
A method to prevent liquefaction that can be implemented in urban areas
- Can be implemented close to existing structures
Implementation causes extremely low ground deformation and so has no impact on nearby structures
- High quality method
A special vibrating rod fitted to the tip of the casing pipe forms densely packed gravel drains