Cutter head of small-caliber rectangular-section vertical shaft heading machine suitable for hard rocks

Abstract

The invention relates to the technical field of square pile construction, in particular to a cutter head of a small-caliber rectangular-section vertical shaft heading machine suitable for hard rocks. The cutter head comprises a tricone bit, a row tooth crushing assembly, a single-cutting-tooth crushing assembly and a block crushing assembly, wherein the row tooth crushing assembly, the single-cutting-tooth crushing assembly and the block crushing assembly are all connected with a mounting plate, and the tricone bit is connected with the mounting plate. The cutter head has the beneficial effects that a high-pressure air pump is utilized to act on a first pneumatic device / second pneumatic device / third pneumatic device so as to drive a first cutting pick / second cutting pick / third cutting pick to crush the rock mass with the circular section, and the free surface is created by the third cutting pick, so that the peak force of the residual rock mass is obviously reduced, and the rectangular section can be formed quickly and conveniently; and compared with the prior art, the rectangular section can be formed quickly and reliably, multiple times of milling treatment are not needed, and a wide application and popularization value is obtained.

Description

technical field [0001] The invention relates to the technical field of square pile construction, in particular to a small-diameter rectangular-section vertical shaft boring machine cutter head suitable for hard rock. Background technique [0002] Square pile is a basic structure generally used in building construction, mainly prefabricated piles. In recent years, square piles have also been widely used in bridge construction. Square piles are increasingly used in large building structures due to their advantages of high stiffness, high bearing capacity and low construction difficulty. The construction process of the square pile is similar to that of the underground diaphragm wall. First, the guide wall is constructed, and the rock and soil mass is taken out using construction equipment according to the thickness of the square pile, and then the reinforcement cage is placed into the pile. [0003] At present, the construction of square piles is generally formed by multiple m...

AI Technical Summary

Problems solved by technology

[0003] At present, the construction of square piles generally forms a roughly square hole through multiple milling of the drill bit. The final overall shape is uneven, and most of them are irregular square shapes, which cannot meet the actual construction needs.

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