Middle pick pile sinking construction method

Middle pick pile sinking construction method

  • CN 103,061,341 B
  • Filed: 01/15/2013
  • Issued: 06/06/2017
  • Est. Priority Date: 01/15/2013
  • Status: Active Grant
First Claim
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1. a kind of middle pick pile sinking construction method for prefabricated pile, the prefabricated pile is set in the outside of drill bit of pile machine, the stakeMachine drill head and auger stem penetrate to the lower end of the prefabricated pile from the upper end of the prefabricated pile and drilling hole are carried out to ground, describedConstruction method injects gases at high pressure while drill bit undermines to form stake holes, and the drilling surflaes of prefabricated pile hollow bulb is by heightCalm the anger body and auger stem enters the storing soil box of a machine, and control the subsidence velocity of the prefabricated pile, bore the prefabricated pileSynchronously sink with drill bit drilling in hole, be to work continuously from the build napiform root that sinks to of the prefabricated pile, and can by instrumentConstructed depending on changing, the drill bit of pile machine is the drill bit of pile machine for expanding the wing with hydraulic pressure, it is characterised in that comprised the following steps:

  • According to soil layer hardness and design requirement, when the drill bit of pile machine excavates the supporting course for arriving ground, or arrived in drill bit of pile machineUp to before supporting course, the prefabricated pile is fixed in stake holes temporarily, and stops injection gases at high pressure, and by hydraulic open stakeThe expansion wing of machine drill head is expanding the radius of turn of the drill bit of pile machine;

    Continue downward drilling to expand the stake holes, the external diameter with diameter greater than the prefabricated pile of the stake holes after expansion;

    Confirm that the radius of turn of the drill bit of pile machine is extended, then to cement mortar is injected in stake holes, continue downward drilling to expandWhile the big stake holes, the drill bit of pile machine stirs the supporting course makes the grit of the cement mortar and the supporting course abundantGround mixing, and complete to build stake end expansion napiform root;

    The interim fixation to the prefabricated pile is released, the prefabricated pile is sunk at the projected depth of the expansion napiform root, make instituteState prefabricated pile to be combined together with the supporting course, and complete the fixation of the prefabricated pile again;

    After the step fixed again of the prefabricated pile, the drill bit of pile machine, the stake machine drill after control expansion are invertedHead bounces back to normal external diameter and makes the drill bit of pile machine continue to invert, and then lifts the drill bit of pile machine and completes construction;

    The fixing device of prefabricated pile is removed after napiform root cement slurry sets are expanded.

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