High-pressure jet grouting pile drill bit based on road and bridge construction application

Abstract

The invention discloses a high-pressure jet grouting pile drill bit based on road and bridge construction application. The high-pressure jet grouting pile drill bit comprises a rod body and a conicalhead, wherein the rod body is of a cavity structure, and a slurry conveying pipe is arranged in the cavity; a movable assembly is further arranged in the cavity of the rod body, a plurality of drill blades are further arranged on the circumferential outer wall of the rod body, when the movable assembly moves in the direction of the conical head, the movable assembly can push the drill blades to move in the direction away from the rod body, and baffles are arranged on the side walls, facing the conical head, of the drill blades; and telescopic pipes are further arranged in the cavity of the rodbody, one ends of the telescopic pipes communicate with the slurry conveying pipe, a connector is arranged at the other ends of the telescopic pipes, sprayer assemblies as many as the drill blades are further arranged on the circumferential outer wall of the rod body, one ends of the sprayer assemblies face the drill blades, and the other ends of the sprayer assemblies are located in the cavity of the rod body. According to the high-pressure jet grouting pile drill bit, the diameter of a pile hole drilled through the drill bit can be adjusted, different use requirements are met, meanwhile, itis guaranteed that in the downward drilling process of the drill bit, mud and stone in soil can be prevented from blocking the slurry conveying pipe, and therefore the construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of road and bridge construction equipment, in particular to a high-pressure rotary grouting pile drill bit based on road and bridge construction applications. Background technique [0002] High-pressure rotary grouting piles use high-pressure rotating nozzles to spray cement slurry into the soil layer and mix with the soil to form a continuous lapped cement reinforcement. The construction area is small, the vibration is small, the noise is low, and it has the advantages of saving wood and steel, durable, and low cost. It has been widely used in the basic engineering of hydraulic construction, industrial construction, civil construction and bridges. The high-pressure rotary grouting pile is to use a drilling rig to drill the rotary grouting pipe and the nozzle at the design elevation of the pile bottom, pass the pre-prepared grout through the high-pressure generating device to make the liquid flow obtain huge...

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Problems solved by technology

[0003] At present, the size of the pile hole formed by most of the existing drill bits is fixed, and it is impossible to flexibly adjust the size of the pile hole formed by the drill bit according to the actual use needs. On the outer wall, when the high-pressure rotary grouting pile machine is drilling in the soil, the gravel and soil in the soil are easy to enter the nozzle and block the slurry delivery pipe, so that the cement slurry cannot flow out normally and the subsequent construction The process cannot continue, and it takes manpower and time to lift the drill pipe out of the hole and then dredge it, which reduces the construction efficiency and delays the construction period

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