Drill rod

Abstract

A drill rod comprises a hollow rod body comprising an outer hexagonal joint and an inner hexagonal joint, a plurality of sets of spiral wings comprising dual-end spiral wings, a plurality of sets of cutting blades comprising two first blades and two second blades and wear-resisting plates; the outer hexagonal joint and the inner hexagonal joint are provided with a semicircular groove and a pin hole respectively; the multiple sets of spiral wings are arranged on the outer wall of the hollow rod body at equal intervals in a radial mode; the multiple sets of cutting blades are arranged on the outer wall of the hollow rod body at equal intervals, first blade faces of the first blades are arranged horizontally, and the first lower edges of the blades are blade edges inclined downwards; second blade faces of the second blades are arranged upwards and downwards, and the second lower edges of the second blades are blade edges inclined downwards; the first blades and the second blades are arranged at equal angle intervals in the radial direction of the hollow rod body; the wear-resisting plates are arranged on the dual-end spiral wings of the spiral wings and a free end arc face of the first and second blades of the cutting blades. The drill rod has the advantages that drilling and excavating are stable, stirring is uniform and the blades resist wear, and the drilling and excavating efficiency is improved.

Description

technical field [0001] The invention relates to a drill rod for agitating drilling rigs suitable for drilling and stirring pebble layers, gravel layers and other foundations, which can widely meet the requirements of underground continuous walls such as urban buildings, subway station shaft enclosures, dam seepage prevention treatment, and soft soil foundation reinforcement. Construction needs. Background technique [0002] In the construction of underground facilities of high-rise buildings, shaft enclosures of subway stations, anti-seepage treatment of river embankments, and reinforcement and improvement of soft soil foundations, the column-type soil cement wall construction method (ie, SMW construction method) has low construction noise and has no impact on the surrounding environment. Small, adjacent piles are completely lapped, good anti-seepage performance, environmental protection and energy saving, short construction period and good economy. Therefore, this construct...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, when using the SMW drilling rig to drill in cobblestone, gravel layers and other strata, the drill pipe composed of pure helical blades is generally used in conjunction with the special sandy soil drilling tool, and there may be or exist uneven drilling and stirring, Severe wear of the spiral blades leads to unstable drilling and mixing quality, which directly affects the construction quality and operating efficiency

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