Porous pipe horizontal rotary spraying drill bit

Abstract

The invention discloses a porous pipe horizontal rotary spraying drill bit. The head of the porous pipe horizontal rotary spraying drill bit is provided with a drill bit section, the back of the drill bit section is coaxially connected with a slurry spraying section spraying high-pressure cement slurry towards soil mass, the back of the slurry spraying section is coaxially connected with a pressure measuring section for detecting pressure of the soil mass around the rotary spraying drill bit, the back of the pressure measuring section is coaxially connected with a slurry discharging section for receiving detection signals of the pressure measuring section and discharging the slurry, and the back of the slurry discharging section is coaxially connected with a connecting section connected with a porous rotary spraying drill rod. The porous pipe horizontal rotary spraying drill bit has a horizontal drilling and rectification function, slurry discharging flow can be effectively actively controlled, the surplus slurry is discharged smoothly, slurry backflow is avoided, values of pressure in the ground around the drill bit are controlled, soil mass pressure balance is guaranteed, quality of a horizontal rotary spraying pile and soil mass stability are guaranteed, and the effects of enlarging pile-forming diameters and effectively controlling ground settlement are achieved.

Description

technical field [0001] The invention relates to a jet-jet drill bit, in particular to a horizontal jet-jet drill bit with porous tubes used for strengthening the foundation of jet-jet piles. Background technique [0002] In foundation reinforcement construction, the method of jet grouting pile reinforcement has been widely used. At present, the rotary spraying method is divided into two construction forms: vertical rotary spraying and horizontal rotary spraying. [0003] The horizontal jet grouting method is also called the horizontal jet grouting pre-support construction technology. In the tunnel engineering, the horizontal jet grouting can be used as an advanced support method. Horizontal rotary grouting uses high-pressure jet slurry to break the surrounding rock, and fully mixes the cement slurry with the surrounding rock through rotary stirring to form a columnar consolidation body, so as to solve the problem of improving the surrounding rock where the grouting cannot a...

AI Technical Summary

Problems solved by technology

In the equipment improved by these two patents, although a certain amount of excess mud can be discharged from the formation, there is no internal pressure detection function at the rotary jet drill bit, and the discharge of excess mud cannot be effectively controlled

Therefore, none of them has the function of correcting deviation during horizontal drilling, let alone solve the problems of deformation of nearby pipelines and uplift of the ground.

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