Multi-azimuth tridimensional stirring drill for mollisol or spongy soil reinforcing stirring pile

Abstract

The invention discloses a multiple position tridimensional stirring drill bit used for leading soft soil or mollisol to reinforce a stirring pile, comprising a drill rod, a front drill point which is positioned at the front end of the drill rod and a multilayer main blade fixed on the drill rod; wherein, the main blade is provided with at least one group of stirring wheels which rotate by taking the main blade as a rotating shaft and does not have power in the process that the drill rod rotates. The multiple position tridimensional stirring drill bit makes use of the energy which is supplied by the rotation of the drill rod and by means of the reaction force of stratum so as to realize the rotation of the stirring wheels, thereby completing the multiple position tridimensional stirring to the stratum by combining the main blade and the stirring wheels and achieving the aim of forming the pile by stirring. The multiple position tridimensional stirring drill bit can remarkably improve the quality of pile forming and effectively reinforce the depth, which has the advantages of uniform stirring, simple structure, strong stratum adaptability, high pile forming efficiency and effectively controlling slurry return.

Description

technical field [0001] The invention relates to a machine tool for composite foundation construction of buildings, in particular to a multi-directional three-dimensional mixing drill bit for reinforcing mixing piles in soft soil or soft soil. Background technique [0002] In the composite foundation treatment of buildings in the prior art, stirring piles are usually used for reinforcement. The method is to stir the foundation soil through mechanical blades, and make it mix with the external curing agent to form piles to reinforce the foundation. Because the pile body adopts the material of the foundation itself, the cost is low, but due to the poor adaptability of the ground, the uniformity of mixing is not easy to grasp, the construction quality is difficult to control, and the construction efficiency is low. In order to solve this problem, there have been many improved mixing drills, the most representative of which are two-way mixing drills and drill bits. The two-way mi...

AI Technical Summary

Problems solved by technology

The two-way mixing drilling rig provides torque in both positive and negative directions from the ground, and through the transmission of nested drill pipes, it drives the blades in different rotation directions to rotate to achieve two-way mixing. The mechanism is complex, and the forward and reverse mixing blades cannot be arranged in multiple layers.

The single-power two-way stirring drill bit uses the reverse thrust plate as the fulcrum to convert the one-way power into two-way rotating stirring, but the structure of the drill bit is complicated

[0003] No matter how it is improved, the structure of the existing mixing drill bit is: a drill rod, a front drill point at the front end of the drill rod, and multi-layer main blades fixed on the drill rod. Generally, two main blades are used for each layer, and they are fixed in a 180-degree straight line. On both sides of the drill pipe, the multi-layer main blades are arranged at 90 degrees between each adjacent two layers. During the stirring process, the rotation of the drill pipe drives the main blades to rotate for stirring, but only rely on this unidirectional stirring. Low efficiency, low mixing intensity, limited pile strength

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