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Single-shaft deep mixing pile drilling tool with inner-layer and outer-layer mixing teeth

An inner and outer double layer, stirring tooth technology, applied in sheet pile wall, construction, infrastructure engineering, etc., can solve the problems of single shaft deep stirring pile body quality defect, large disturbance of adjacent stratum, etc., to improve cutting and crushing efficiency, stratum The effect of small disturbance and improved efficiency

Pending Publication Date: 2021-04-09
王琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a new type of single-axis deep-stirring pile, which overcomes the problems of the quality defect of the existing single-axis deep-stirring pile body and the large disturbance of the adjacent strata during the construction process, and can reduce the project cost and reduce the impact on the surrounding environment. Deep stirring pile drilling tool

Method used

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  • Single-shaft deep mixing pile drilling tool with inner-layer and outer-layer mixing teeth
  • Single-shaft deep mixing pile drilling tool with inner-layer and outer-layer mixing teeth
  • Single-shaft deep mixing pile drilling tool with inner-layer and outer-layer mixing teeth

Examples

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Effect test

example 1

[0034] Example 1. Construction method of deep-stirring piles to reduce disturbance by isolating the ground outside the borehole

[0035] When the stirring teeth of the traditional mixing pile cut and break the formation, there is still a large disturbance to the formation outside the borehole, thus affecting the construction facilities near the mixing pile. Using the single-axis stirring pile drilling tool of the present invention, the stirring cover 3 of the outer layer can isolate the broken soil body in the borehole from the formation outside the borehole, and when the stirring shaft 1 of the inner layer rotates together with the drill pipe, it is distributed in the stirring The stirring teeth 12 on the shaft 1 rotate inside the stirring cover 3, so that cutting and breaking rock and earth blocks can greatly reduce the disturbance of the formation outside the borehole.

example 2

[0036] Example 2. Construction method of deep-stirring pile with bottom spraying grouting to reduce drilling resistance and top spraying grouting fully mixed

[0037] A drill bit 4 is connected to the lower end of the stirring shaft 1, and a bottom grout port 14 is arranged at the bottom. When drilling down, the bottom grout port 14 sprays slurry to lubricate the drill bit in time, reducing the resistance of the drilling process. Simultaneously, the inner stirring tooth 12 and the outer stirring tooth 33 that the slurry of injection encounters in the drilling process give mixing, so that the soil solidifying agent (slurry) is mixed together with the broken rock and soil particles.

[0038] When the drill pipe is lifted up, the top grouting port 13 starts to spray grout, and the sprayed grout encounters the inner stirring teeth 12 and the outer stirring teeth 33 during the drilling process, giving mixing, so that the soil solidifying agent (slurry) and the crushing The rock and...

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Abstract

The invention discloses a single-shaft deep mixing pile drilling tool with inner-layer and outer-layer mixing teeth. A drill rod of the single-shaft deep mixing pile drilling tool is of a double-layer structure, a mixing shaft and a drill bit are arranged at the lower end of the inner-layer drill rod, and the outer-layer drill rod is connected with a mixing cover; the outer-layer mixing teeth are arranged on the cylindrical hollowed-out mixing cover, and the inner-layer mixing teeth are arranged on the hollow mixing shaft; the inner-layer and outer-layer mixing teeth are arranged in a staggered mode in space and engaged with each other; the mixing cover covers the inner-layer mixing shaft; and a top slurry spraying opening is formed in the upper portion of the mixing shaft, and a bottom slurry spraying opening is formed in the drill bit. Rock-soil particles are efficiently broken and fully mixed with soil hardening agent slurry to form fluid hardened soil. The single-shaft deep mixing pile drilling tool has the social benefits of being environmentally friendly, safe and reliable, meanwhile, the manufacturing cost can be reduced, the construction period can be shortened, and great economic value is achieved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a single-axis deep-stirring pile drilling tool used for foundation reinforcement, rigid composite piles and water-stop curtain construction. Background technique [0002] In construction engineering, uniaxial deep-stirred piles are widely used as the main soft soil foundation reinforcement treatment and the peripheral piles of stiff composite piles. However, when the uniaxial deep stirring pile cuts and mixes the formation soil through the mixing blades, the soil between the mixing blades, especially the cohesive soil, is often tightly bonded to the blades and wraps around the mixing blades so that it cannot be cut and broken, making it It is difficult to mix with the soil curing agent slurry (such as cement slurry), which leads to major problems in the uniformity and quality of the deep stirring pile body. [0003] For areas highly sensitive to the surrounding environ...

Claims

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Application Information

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IPC IPC(8): E02D5/46
CPCE02D5/46
Inventor 不公告发明人
Owner 王琪
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