Multi-shaft and multi-direction stirring drill bit and construction method thereof

Through the design of a multi-axis and multi-directional stirring drill bit, the counterclockwise rotation of the multi-stage stirring blade grouping is solved, and the problems of uneven stirring and low pile body strength are achieved, efficient stirring and quality improvement are achieved, and suitable for foundation pit support, anti-seepage engineering and foundation reinforcement.

CN120384511APending Publication Date: 2025-07-29SHANGHAI ZHIPING FOUNDATION ENG CO LTD
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Patent Information

Application Number
CN202410120996.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-01-29
Publication Date
2025-07-29

AI Technical Summary

Technical Problem

The existing mixing pile technology has problems such as uneven mixing, few soil shearing times, low pile strength and high discreteness in soft soil areas. Especially in foundation pit enclosure and foundation treatment, it is difficult to effectively improve the curing reaction effect of foundation soil and cement slurry.

Method used

A multi-axis multi-directional stirring drill bit is used to drive multiple drill rods and drill bits through the power combination section, and rotate it in a clockwise and counterclockwise manner with the multi-stage stirring blades to achieve multiple stirring of the curing liquid within the range of the drill rod and the stirring blades, enhance the soil shearing effect, and form high-quality cement soil.

Benefits of technology

It improves the mixing efficiency, increases the number of soil shearing, improves the pile body strength and anti-seepage performance, ensures the quality of the pile body, and can break through the extreme depth of normal pressure grouting in complex environments and improves construction quality.

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Abstract

The multi-shaft and multi-direction stirring drill bit comprises a power combination section, a plurality of drill rods are arranged on the power combination section in a driving mode, a first-stage drill bit and a second-stage drill bit are arranged at the lower ends of the adjacent drill rods respectively, and slurry outlet holes are formed in the first-stage drill bit and the second-stage drill bit. The first-stage drill bit and the second-stage drill bit are both provided with stirring blades, the power combination section is started through the stirring pile machine, the power combination section drives the drill rod to rotate so as to drive the first-stage drill bit and the second-stage drill bit to rotate, and then the stirring blades rotate to stir solidification liquid sprayed out of the slurry outlet holes. Compared with the prior art, the invention has the following advantages: the multi-shaft and multi-direction stirring technology is adopted, the drill bit and the blade parts are improved basically, and the separation of rotating speed and acceleration can be achieved; and meanwhile, the drill rod and the stirring blades can rotate in multiple directions, so that the shearing times of the soil body can be effectively increased, the soil body can be fully stirred, the strength of the pile body can be improved, and the quality of the pile body can be ensured.
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