CF Drain Method (Partially covered sand drain method)

This method aims at reducing costs by exploiting the merits of both the bagged sand drain and the sand drain methods, covering only the necessary sections with mesh tubes. There is no loss of continuity in loading during and after implementation and the consolidation drainage effect is maintained.


  • Wide application
    A sand drain method applicable even to extremely soft ground that cannot maintain continuity in sand columns.
  • Implementation management
    A range of gauges for implementation management show the depth the casing pipe has reached, the changing sand level in the casing pipe, and the status of the mesh tubes in the ground.
  • Economical
    Only the necessary sections at preferred depths within the ground need be covered, saving on costs.

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