Swing spraying cement soil wall drill bit and construction method thereof

Abstract

The invention discloses a swing spraying cement soil wall drill bit and a construction method thereof. The swing spraying cement soil wall drill bit is characterized in that a hydraulic oil cylinder is arranged at the butt joint position of a drill rod and the drill bit, and the drill bit is hinged to a center shaft through a second rotating shaft; a cement paste pipe, a water pipe and a compressed air pipe are all hoses, and a telescopic hose is arranged outside the butt joint position of the drill rod and the drill bit for connection; the hydraulic oil cylinder is fixedly arranged on the drill rod, a first rotating shaft is arranged at the top end of a push rod of the hydraulic oil cylinder and is hinged to the drill bit; and the hydraulic oil cylinder drives the push rod through a connected oil way pipeline to enable the drill bit to swing left and right, meanwhile, a spraying hole of the drill bit sprays slurry horizontally, and the slurry spraying direction is perpendicular to theswing direction. Compared with the prior art, the drill bit has the advantages that the thickness of the cement soil wall is controlled according to the swing angle, the guniting pressure is adjustedto control the length of a single waterproof curtain, lap joints and engineering cost are reduced, the rigidity of the soil pile (wall) is effectively improved, the construction period is shortened,and the construction quality is further improved.

Description

technical field [0001] The invention relates to the technical field of pile foundations and drilling rigs, in particular to a construction drill bit for pendulum-spraying cement-soil walls and a construction method thereof. Background technique [0002] At present, conventional cement-soil piles (walls) generally use biaxial mixing piles, three-axis mixing piles, and double-wheel milling and mixing walls. Due to the different thickness of the cement-soil pile (wall), the drill bit or washing wheel needs to be replaced, and some lap joints will have more joints, which will affect the construction quality of the cement-soil pile. The cement-soil pile formed by multiple lap joints is To ensure the effective thickness of the cement-soil pile, it is necessary to increase the diameter of the single circle, resulting in a certain waste of cement material, making the project cost high and the construction period long. Contents of the invention [0003] The object of the present i...

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Problems solved by technology

[0002] At present, conventional cement-soil piles (walls) generally use biaxial mixing piles, three-axis mixing piles, and double-wheel milling and mixing walls. Due to the different thickness of the cement-soil pile (wall), the drill bit or washing wheel needs to be replaced, and some lap joints will have more joints, which will affect the construction quality of the cement-soil pile. The cement-soil pile formed by multiple lap joints is To ensure the effective thickness of cement-soil piles, it is necessary to increase the diameter of a single circle, resulting in a certain waste of cement materials, resulting in high project costs and long construction periods

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