A jet stirring device for filling the voids of a coarse-grained material dam body

Abstract

The invention discloses a device for filling the gap of a coarse-grained material dam body with jet flow stirring, and sand materials (8) are stacked around it, and it is characterized in that the upper and lower ends of the main shaft (1) are threadedly connected with the drill pipe The body (2) is threaded; the four auxiliary stirring arms (3) are welded in a cross shape on the horizontal plane to the shaft arm of the main shaft (1) with a cavity structure inside, and the auxiliary stirring arms (3) are font-shaped, and each There is a vertical grouting hole (4) in the middle of the horizontal arm (3.1) of each auxiliary stirring arm (3), and the vertical arm (3.2) of each auxiliary stirring arm (3) is a solid structure, and the vertical arm (3.2) The tail part of the drill pipe shrinks inward; it overcomes the shortcomings of the existing technology that the slurry diffusion radius is not easy to control and the slurry consumption is large when the thick slurry is poured through the drill pipe, and the stirring and filling efficiency is 35% higher than that of pouring the fluid state mortar through the inner cavity of the drill pipe. % more advantages.

Description

technical field [0001] The invention relates to the technical field of strengthening the dam body of dangerous granular materials in water conservancy and hydropower projects, and more specifically relates to a device for filling the gaps of the coarse-grained material dam body with jet stirring. Background technique [0002] During the special historical period from the 1950s to the 1970s in my country, the dam bodies of coarse-grained dams such as gravel dams, sand pebble dams, and rockfill dams were limited by the construction technology level at that time, and some dams were not compacted due to rolling. , the porosity is large, which leads to large deformation of the dam body, and long-term non-convergence, which eventually leads to the destruction of the anti-seepage system. The damage of the anti-seepage system caused by the deformation of the dam body needs to be reinforced by engineering measures or the natural deformation of the dam body is stabilized before the ant...

AI Technical Summary

Problems solved by technology

However, for coarse-grained dams with many voids and large porosity, the current engineering reinforcement measures are mostly direct injection of thick slurry through drill pipes or injection of fluid mortar through drill pipes. The diffusion radius of slurry is difficult to control due to the difficulty of injecting thick slurry through drill pipes There are many problems such as large slurry consumption and low injection efficiency; while injecting fluid mortar and other coarse-grained materials through drill pipes, the injection efficiency is low, and the gaps in the dam body are filled unevenly, which easily leads to blockage of drill pipes

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