Construction method of multielement stiffness composite pile

Abstract

The invention discloses a construction method of a multielement stiffness composite pile. The construction method comprises the steps that a plurality of spraying pipes for different materials are arranged in a stirring shaft, and nozzles of the spraying pipes are arranged at the different portions of the stirring shaft or stirring blades; when the stirring shaft runs in a hole, through high-pressure air sprayed by the spraying pipes, water cuts original soil, stirring is carried out, and therefore soil is softened; and the materials are sprayed into the softened soil and are stirred, meanwhile, through a chain and back pressure spiral blades arranged on a pile machine, cement composite soil within the total-length range is subject to rotary pressing, extrusion and expansion, and the high-strength multielement stiffness cement composite pile with the maximum dry density is formed. The multielement stiffness composite pile is reasonable in structure, convenient to construct and good in construction quality, and compression resistance, pulling resistance and horizontal force resistance are superior to those of existing pile types like a drilling pouring pile; according to the water content of different kinds of soil, the water containing ratio, the kind of curing agents and the mixing amount are adjusted; and according to the load character and magnitude, the type of the multielement stiffness composite pile can be adjusted, and therefore the strength of the multielement stiffness composite pile is coordinately matched with the strength of a core pile body.

Description

technical field [0001] The invention relates to a pile construction method. Background technique [0002] The existing methods of making cement soil are single powder spraying, slurry spraying mixing, grouting, three-axis mixing, high-pressure rotary spraying and chemical grouting; the existing single rigid pile is difficult to give full play to the strength of the pile body material; the existing high-pressure Slurries such as rotary spraying and three-axis stirring piles have relatively high water content and are difficult to be compacted; the existing powder spraying piles have low ash spraying pressure, especially in deep soil layers with low water content, it is difficult to spray powder smoothly and evenly . Contents of the invention [0003] The purpose of the present invention is to provide a construction method of multi-element rigidity composite pile that overcomes the above disadvantages and retains the advantages of various methods. [0004] Technical solutio...

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Problems solved by technology

[0002] The existing methods of making cement soil are single powder spraying, slurry spray mixing, grouting, three-axis stirring, high-pressure rotary spraying and chemical grouting; the existing single rigid pile is difficult to fully exert the strength of the pile body material; the existing high-pressure