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  • S.D(Sand Drain)/S.C.P(Sand Compaction Pile) method
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S.C.P VIDEO
S.D VIDEO
  • The most popular vertical drain method.
  • Load on the ground for consolidation after installation of 40cm sand pile.
  • Rubbles are mainly used due to high permeability instead of sand
  • Using same equipments with sand compaction pile to put casing inside of ground to make sand drain by in / out of casing without tamping.
  • Making ground with high density using Vibration energy to tamp the sand drain of 60-80cm diameter.
  • Generally used for ground reinforcement because stability of sand drain and reduce volume of subsidence.
  • Rubbles are mainly used due to high permeability instead of sand.

(S.D working FLOW)

(S.D working procedure)

  • 1 Setting the casing at working point
    Keep casing bottom at ground level and keep sand level gauge and depth gauge at ‘0’
    2 Put casing into ground by hammer
    Hit with check current gauge and depth gauge
    3 When casing inserted 5M from ground level, hold sand level gauge 3M from ground level
    When depth gauge indicate exact central, brake the hammer winch, hold casing input
    4 Put sand in casing with open dump valve of hopper
    5 Keep sand level gauge in working
    6 Start casing put out
    Must check sand level indicator going down
    7 Stop casing put out when sand level plumb in casing keep 1.0 - 1.5M
    (G.L - S.L = 1.0 - 1.5M), close air jet valve
    8 Close pressure valve in casing
    open exhaust valve → keep out the sand level plumb → put sand inside
    9 Close exhaust valve → open air jet valve → start casing out with check sand level indicator
    10 When depth gauge indicate 1M from ground level, open pressure valve in casing and stop air jet → close exhaust valve → Put out casing slowly and stop the hammer
    11 Put out casing till full separation from ground
    wait till full out of sand in casing

(S.C.P working flow FLOW)

(S.C.P working procedule)

  • 1 Setting the casing at working point
    Keep casing bottom at ground level and keep sand level gauge and depth gauge at ‘ 0 ’
    2 Put casing into ground by hammer
    Hit with checking current gauge and depth gauge
    3 When casing inserted 5M from ground level, hold sand level gauge 3M from ground level
    When depth gauge indicate exact central, brake the hammer winch, hold casing input
    4 Put sand in casing with open dump valve of hopper
    5 Keep sand level gauge in working
    6 Start casing put out
    Must check sand level indicator going down
    7 Put casing 2M in ground (with checking depth level gauge)
    8 Stop casing out when sand level gauge indicate 1.5M
    9 Put sand inside with sand level plumb winding up
    10 Keep sand level gauge down again
    11 Take out of casing with check sand level indicator (standard 3M)
    12 Repeat step 7.8 and 9
    13 When depth gauge indicate 1M from ground level, open pressure valve in casing and stop air jet → close exhaust valve → Put out casing slowly and stop the hammer