SPLICED INJECTION PILE (very low vibration level, displacement pile)
The spliced injection pile is, basically, a steel tube pile encased in hardened cement grout. During installation the ground is wholly displaced, thereby increasing the bearing capacity. The steel tube is installed by driving with a drop hammer, whilst simultaneously injecting cement grout. During the installation the grout acts as a lubricant, which temporarily reduces driving resistance. When set the cement grout increases the strength and stiffnes of the pile, transfers part of the loading to the ground and gives corrosion protection to the steel tube. The steel tube is filled with cement grout.



MAIN FEATURES:

  • The steel tube is installed by driving whilst simultaneously injecting cement grout. The grout acts as a lubricant which temporarily reduces driving resistance, resulting in a very low vibration level during installation;
  • The pile displaces the soil (no ground upheaval, no reduction in cone resistance values);
  • Steel shaft makes the pile suitable for dynamic (tensile) loading situations;
  • Steel shaft has a relative large steel section providing stiffnes/ rigidity of the pile (anchor piles);
  • Pile head design and cement casing protects pile against corrosion;
  • The pile can be installed anywhere (depending on soil conditions) but, because it is segmental, it is particularly suitable for use in situations with restricted access or headroom.


APPLICATIONS OF SPLICED INJECTION PILES:
  • Renovation works
    • Operations within existing buildings / works close to adjecent buildings, old quaywalls, etc. / piling to strengthen or renew foundations (underpinning);
    • Working heights or headroom clearance of minimum 1.8 m feasible (depending on proposed details);
  • Reconstruction works
    • In industry, roadworks or close to water-retaining structures;
  • New buildings
    • Close to vibration-sensitive premises / close to installations and buildings containing vibration sensitive equipment;
  • Special applications
    • Piling in connection with transmission masts, advertising structures, machine foundation, etc.;
    • Anchor or tension piles;
    • Strut piles;
    • Piles with limited elastic behaviour;
    • Piles with tensioned structures.


TECHNICAL INFORMATION ON SCREW INJECTION PILES:
  • Diameter of tubular steel sections: 34 mm, 42 mm, 73 mm, 89 mm, 114 mm, 140 mm, 168 mm;
  • Diameters of tube / pile:
      34 /   60 mm
      42 /   80 mm
      73 / 120 mm
      89 / 130 mm
    114 / 150 mm
    140 / 200 mm
    168 / 240 mm;
  • Length of the pile: depending on the depth of the bearing stratum, soil conditions, the equipment used and the pile diameter;
  • Pile load up to 750 kN;
  • Maximum rake 6:1;
  • Length of tubular sections: adjusted to the working conditions;
  • Weight of drop hammer: depending on the dimensions of the pile and the soil conditions;
  • Minimum working height: from 1,8 m, depending on equipment, the dimensions of the pile and soil conditions;
  • Minimum distance from centre of pile to a wall: from 0.15 m to 0.35 m depending on the dimensions of the pile, the pile-driving rig required and the working space;
  • Minimum access width: from 0.5 m, depending on the dimensions of the pile and the pile-driving rig required.

Subject to alteration

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