Compact bearing high-pressure jet grouting drill bit

Abstract

The invention discloses a compact bearing high-pressure jet grouting drill bit. The compact bearing high-pressure jet grouting drill bit comprises a drill rod body and a drill bit body. The drill rodbody is of a shaft-shaped structure. A connecting block is fixed to the bottom of the drill rod body, and the drill rod body and the connecting block are integrally formed through casting. A jet grouting water conveying channel is formed in the center of the interior of the drill rod body. The compact bearing high-pressure jet grouting drill bit is simple and reasonable in structure, jet groutingcutting at the drilling position can be achieved through the arrangement of a jet grouting compact high-pressure cutting tool bit and a nozzle at the front end of the drill bit body, a first cutting tool bit and a second cutting tool bit are used in cooperation, the first cutting tool bit cuts the outer ring of the drilling position, the second cutting tool bit cuts the inner ring of the drillingposition, and therefore the cutting speed and effect during drilling are improved; and due to the arrangement of a lateral nozzle on the outer side of the drill rod body and a nozzle at the front end,a coaxial and non-concentric cutting nozzle process is adopted, high-pressure jet cutting can be conducted on the side wall of a drilled hole and the front end of a drill bit at the same time, and the high-pressure jet grouting effect is improved.

Description

technical field [0001] The invention relates to the technical field of jet-jet drilling equipment, in particular to a high-pressure jet-jet drill bit with a composite sheet bearing. Background technique [0002] In recent years, with the rapid development of national capital construction projects, the construction scale of railways, highways, airports, docks and high-rise buildings has continued to expand, and the quality requirements for foundation treatment, foundation pit support and foundation pit water sealing have continued to increase. The spray pile technology has the advantages of simple equipment, convenient construction, fast speed, material saving, high efficiency, low cost, simple operation, and wide application range, and is widely used in many infrastructure fields. The rotary grouting drilling rig is a special equipment for the construction of rotary grouting piles. It uses media such as slurry, compressed air, and clean water to perform rotary grouting with ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the present invention provides a technical field related to jet jet drilling equipment, which adopts jet jet composite high-pressure cutting head to improve the cutting effect of the drill bit, and through coaxial and non-concentric cutting nozzles, it can simultaneously The side wall and end of the hole are sprayed with high pressure, which is convenient for drilling the side wall and expanding the bottom end of the drill bit, which solves the problems of slow drilling speed and inconvenient removal of the drill bit

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