Triangular pyramidal jet grouting pile alloy drill bit

An alloy drill bit, triangular conical technology, applied in the direction of drill bit, drilling equipment, earthwork drilling and mining, etc., can solve the problems that the drill bit is easy to be ground or broken, and cannot drill to the designed depth, so as to overcome the difficulty of pile formation and the scope of application Extensive, the effect of overcoming technical difficulties

Inactive Publication Date: 2015-03-18
SHANGHAI ERSHIYE CONSTR CO LTD
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Problems solved by technology

[0003] In order to overcome the technical problems that the jet grouting pile drill bit cannot drill to the designed depth in the ultra-deep and complex stratum and the drill bit is easily ground or broken during drilling, the present invention provides a method of combining the drill bit with water-air impact. Drilling, at the same time on the side of the drill bit and the head of the triangular conical jet spray pile alloy drill bit with alloy block

Method used

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  • Triangular pyramidal jet grouting pile alloy drill bit
  • Triangular pyramidal jet grouting pile alloy drill bit

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Embodiment Construction

[0010] figure 1 The drill bit alloy block (1), the drill bit (2), and the drill body (3) form the alloy drill bit of the triangular conical rotary spraying pile, figure 2 The pipe tip (4), outer nozzle (5), inner nozzle (6), inner pipe (7), outer pipe (8) and outer pipe male joint (9) constitute the triangular conical rotary spray pile alloy drill bit internal structure. The alloy drill bit of the triangular conical rotary spraying pile is a double nozzle, and the double nozzle is a device for realizing the coaxial spraying and drilling of slurry and gas. There are two nozzles for slurry gas coaxial injection at the nozzle, and the gas nozzles are ring-shaped and set outside the high-pressure slurry nozzle. When the triangular conical jet jet pile alloy drill bit is drilling, the high-pressure water is sprayed out from the inner nozzle (6) through the inner pipe (7) to punch and destroy the soil, and the high-pressure gas is surrounded by the outer nozzle (5) through the ou...

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Abstract

The invention discloses a triangular pyramidal jet grouting pile alloy drill bit of a drilling machine capable of drilling a designed depth in a ultradeep complex soil layer. A moisture center jet and ball valve compact technology is introduced to modify a water way and an air way, the general moisture jet from side surface at ordinary times is changed to the aslant downward jet, and alloy blocks are additionally arranged on the side surfaces and the head of the drill bit, so that the technical difficulties of incapability of drilling after the drilling of a certain depth in the ultradeep complex soil texture and easy abrasion and rupture of the drill bit in a jet grouting pile drill bit are solved.

Description

Technical field [0001] The present invention relates to a kind of drill bit of the drilling rig during the drilling construction process of rotary grouting piles. During the construction process, it was found that the existing common drill bit could not meet the construction requirements of this project, so the unit researched and improved the drill bit. After the improvement The drill bit can meet the construction needs of smooth drilling in ultra-deep and complex soil. 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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/60E21B10/46
CPCE21B10/60E21B10/46
Inventor 张建华孙中盛施利斌
Owner SHANGHAI ERSHIYE CONSTR CO LTD
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