Drilling-hole press-filling-concrete-pulp agitation base-enlarging method and apparatus

Abstract

Drilling, grouting, stirring, bottom expansion and pressure pouring concrete method and device. In the grouting, stirring and bottom expansion method currently used in building pile foundations, the devices used are often damaged, and the failure rate is high, which cannot ensure the normal operation of the stirring bottom expansion process. The present invention and its device can solve the above problems. When the drilling rig is drilling, the cement slurry is injected into the core tube of the drill pipe through the grouting pipeline arranged on the elbow, and when the drill reaches the design depth, the grout installed on the upper part of the power head is started. The hydraulic cylinder pulls the wire rope through the anti-twist rotary head at the lower end of the piston rod of the hydraulic cylinder, and drives the flip-type drill bit to turn over. After the turned diameter exceeds the diameter of the drill pipe and meets the design requirements, it is lifted while rotating and expanding the bottom. After the sandy soil layer and the cement slurry are stirred and expanded to reach the design height, the hydraulic cylinder retracts and turns the drill bit to stop stirring and expands the bottom, and finally the concrete is poured while lifting the drill to form a pile. The invention is suitable for building construction of building pile foundations.

Description

Technical field: [0001] The invention relates to a construction method and a device for building pile foundations. Background technique: [0002] At present, the hole reaming method commonly used in building pile foundations and the concrete pumping device of the drill pipe central pumping device for grouting, stirring, and bottom expansion declared by myself, the existence of the hydraulic cylinder of the device, the working environment at the drill bit is harsh, and when the oil cylinder is stretched out, it will contact the sandy soil layer. Stir friction is relatively easy to damage, the failure rate is not ideal, and it has an impact on the bottom expansion process of stirring. The hydraulic oil pipe is along the outer wall of the drill pipe to the drill bit, and sometimes it is scratched by hard blocks in the soil layer and the drilling stops. Invention content: [0003] The object of the present invention is to provide a drilling, grouting, stirring, bottom-expandin...

AI Technical Summary

Problems solved by technology

[0002] At present, the hole reaming method commonly used in building pile foundations and the concrete pumping device of the drill pipe central pump for grouting and stirring bottom expansion declared by myself, the existence of the hydraulic cylinder of the device is in a bad working environment at the drill bit, and when the cylinder is stretched out, it will contact the sandy soil layer. Stir friction is relatively easy to damage, the failure rate is not ideal, and it has an impact on the bottom expansion process of stirring. The hydraulic oil pipe is along the outer wall of the drill pipe to the drill bit, and sometimes it is scratched by hard blocks in the soil layer and the drilling stops

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