Double-plough double-stirring drill bit mechanical structure

Abstract

The invention relates to a double-plough double-stirring drill bit mechanical structure, which includes a rotary shaft with a conical drill bit at the lower end. A horizontal plough group and a vertical plough group are arranged at the lower end of the rotary shaft, a plurality of shaft wheels which are arranged at intervals on the upper part of the rotary shaft, each shaft wheel comprises a wheelring and a plurality of short rods, the horizontal plough group is composed of a plurality of horizontal unit ploughs which are connected side by side in the radial direction, and the directions of every two adjacent horizontal unit ploughs are opposite; a grouting pipe is located on the lower side of the middle of the horizontal plough group, a plurality of grouting holes are formed at intervalsin the grouting pipe, the grouting holes are sealed with screw heads, and parts of the screw heads are unsealed before drilling as required; and the vertical plough group comprises a conical hollow cross bar arranged in the radial direction and a plurality of vertical unit ploughs which are arranged at intervals, the directions of every two adjacent vertical unit ploughs are opposite, the front ends of the vertical unit ploughs are pointed blades, and the rear ends of the vertical unit ploughs are dovetail-shaped bifurcated double blades. According to the double-plough double-stirring drill bit mechanical structure, stirring of cement and soil can be realized in both down drilling and ascending stages, and the construction efficiency and pile-forming quality are improved advantageously.

Description

technical field [0001] The invention relates to the construction field, in particular to a mechanical structure of a double-plow and double-stirring drill bit used for cement-soil mixing pile construction. Background technique [0002] Cement-soil mixing pile is a method for reinforcing saturated soft clay foundations. It uses cement as a curing agent, and the soft soil and curing agent are forced to be stirred deep in the foundation through a cement-soil mixing pile machine. A series of physical and chemical reactions produced during the process make the soft soil harden into a high-quality foundation with integrity, water stability and certain strength, so as to achieve the purpose of strengthening the foundation. The reinforcement depth usually exceeds 5m, the dry reinforcement depth should not exceed 15m, and the wet reinforcement depth should not exceed 20m. The cement slurry pressed into the soft soil and the surrounding soft soil are forcibly mixed with the rotating ...

AI Technical Summary

Problems solved by technology

In order to improve the quality of piles, construction units generally adopt the method of increasing the mixing time to improve the uniformity of mixing. However, although this construction method improves the quality of piles to a certain extent, its construction efficiency is significantly reduced. up

Therefore, it is not a proven solution

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