Special drill bit for pile foundation construction hole forming under complex geological conditions

Abstract

The invention provides a special drill bit for pile foundation construction hole forming under complex geological conditions, and relates to the technical field of pile foundation construction. The special drill bit for pile foundation construction hole forming under the complex geological conditions comprises a drill rod, a spiral blade is fixedly arranged on the outer wall of the lower end of the drill rod, a mounting seat is fixedly connected with the lower end of the drill rod, an impact drill bit is fixedly arranged in the mounting seat, a positioning sleeve fixedly sleeves the outer wall of the upper end of the drill rod, fixing rings are fixedly arranged at the upper end and the lower end of the positioning sleeve, four connecting rods are fixedly connected to the outer walls of the two fixing rings, and auxiliary protective rings are fixedly connected to the ends, away from the fixing rings, of the four connecting rods. According to the special drill bit for pile foundation construction hole forming under the complex geological conditions, the drilling work is quicker, the impact drilling efficiency on hard rocks is higher, drilling slag generated during drilling can be conveniently sucked out from the top of the impact rod and discharged, and the drill bit can adapt to construction of pile foundations under the complex geological conditions.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction, in particular to a special drill bit for forming holes in pile foundation construction under complex geological conditions. Background technique [0002] There are several types of bridge pile foundations: sinking piles, bored piles and excavated piles, among which bored piles are the most widely used pile foundations. [0003] At present, the hole-forming construction technology of conventional bridge pile foundations at home and abroad is relatively mature. For complex sea environment, bridge pile foundation construction is generally constructed with the help of steel casings. The research on steel casings in foreign countries started earlier and more comprehensively. Numerical simulation, The researches in the three parts of experimental research and theoretical analysis are relatively in-depth and specific, while domestic research results on steel casings mainly focus on ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a special drill bit for pile foundation construction under complex geological conditions, which solves the problems caused by factors such as complex geology, hydrological conditions, changeable meteorological conditions, seawater corrosion, wind and waves, etc. Unfavorable engineering problems such as difficult concrete transportation, long design reference period, concrete corrosion, huge engineering volume and poor construction continuity make the design and construction of marine environment pile foundations more difficult than land pile foundation projects

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