PHC pile and water flush gas lift static pressure pile-sinking method

PHC pile and water flush gas lift static pressure pile-sinking method

  • CN 1,296,569 C
  • Filed: 11/09/2004
  • Issued: 01/24/2007
  • Est. Priority Date: 11/09/2004
  • Status: Active Grant
First Claim
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1. , pile jacking in method is lifted in the water qi of chong channel ascending adversely of novel PHC stake, it is characterized in that:

  • The first step, ground surface weak soil layer pile sinking adopt static pressure to bury, and static pressure is not to till a stake pressure is sunk with maximum pile driving pressure;

    Second step, the stake point sinks when reaching sand or crushed gravel layer, insert the aqueous vapor compound tube from the stake top to hollow cavity, after the aqueous vapor compound tube sinks and reaches a point, import water under high pressure and compressed air respectively to water-supply-pipe and appendix, water under high pressure penetrates from stake point weep hole, and the sand and the crushed gravel that directly wash away a crack tip form the sandstone mixing water;

    The nationality gas lift method is discharged the sandstone mixing water from bottom to top along the hollow cavity of stake from the stake top, just can sink to stake sand and crushed gravel layer with less pile driving pressure this moment, Yi Bian import water under high pressure and compressed air thus, Yi Bian add static pressure, sand stone layer passed in stake;

    The 3rd step after the stake point passes sand and crushed gravel layer, when arriving the weak soil layer, stopped jetting, and only the nationality static pressure is passed weak soil with stake and sunk to design elevation;

    Perhaps, to there not being the sand stone layer ground pile sinking of weak soil under sand and the crushed gravel layer, pile sinking stops jetting to last 1~

    2 meter of sand stone layer, and pure static pressure is to design elevation.

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