Combined multifunctional rock and soil spiral drill tool

Abstract

The invention discloses a combined multifunctional rock and soil spiral drill tool which comprises a spiral blade, an impact hammer, a sleeve and a drill bit. A connector is connected with the upper end of the sleeve and is connected with a drill rod, and the spiral blade is welded on the outer wall of the sleeve; the impact hammer is arranged inside the sleeve, and an impact drill bit is connected with the bottom of the sleeve; a drill bit shank is mounted in the sleeve and is positioned at the bottom of the impact hammer, and a plurality of air holes are formed in the side walls of the drill bit. The combined multifunctional rock and soil spiral drill tool has the advantages that the construction cost can be reduced to a great extent and only accounts for 1 / 5 of the original construction cost; disturbance of impact force on base rock can be effectively prevented by micro-impact technologies, the bearing capacity of pile foundations can be guaranteed, and air pollution due to silt can be prevented; the combined multifunctional rock and soil spiral drill tool which is a novel product is safe, and loss of drill machines and equipment can be minimized; guide functions are designed for the bottom of the drill bit, accordingly, work applying directions can be changed, and accordingly rotary striking can be carried out; destruction of the base rock due to the impact force can be reduced to a great extent owing to micro-impact and little-impact technologies, and the quality of drilled holes can be improved.

Description

technical field [0001] The invention relates to the technical field of drilling machinery, in particular to a composite multifunctional rock-soil auger drilling tool. Background technique [0002] At present, several drilling tools commonly used in underground geotechnical drilling have different problems: spiral scraper drilling tools: only suitable for drilling shallow soil and strong weathered stratum structures on stone surfaces; roller cone drilling tools: The rock-breaking drilling efficiency is low, and it is not suitable for drilling in soil layers; impact drilling tools: (1) Low-frequency impact type, low efficiency, difficult to guarantee the verticality of the pile, and easy to damage the bedrock, mud wall protection is required during construction. Based on the above reasons, the pile quality is greatly reduced. (2) The high-frequency impact type is expensive, and the slag cannot be discharged in time, resulting in repeated crushing of rocks until they are impac...

AI Technical Summary

Problems solved by technology

[0002] At present, several drilling tools commonly used in underground geotechnical drilling have different problems: spiral scraper drilling tools: only suitable for drilling shallow soil and strong weathered stratum structures on stone surfaces; roller cone drilling tools: The efficiency of rock-breaking drilling is low, and it is not suitable for drilling in soil layers; impact drilling tools: (1) low-frequency impact type, low efficiency, difficult to guarantee the verticality of piles, and easy to damage bedrock, mud wall protection is required during construction

Based on the above reasons, the pile quality is greatly reduced

(2) The high-frequency impact type is expensive, and the slag cannot be discharged in time, resulting in repeated crushing of rocks until they are impacted into powder and particles

The blowing of slag also caused environmental pollution and caused hidden dangers to the safety of construction workers on site.

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