Anti-blocking device for mixing pile drill rod and working method

Abstract

The invention relates to an anti-blocking device for a mixing pile drill rod and a working method. The anti-blocking device comprises an anti-blocking base used for being fixedly connected with a drill rod. The anti-blocking base is provided with a grout outlet channel matched with a grout spraying hole of the drill rod, the anti-blocking base is in sliding connection with an anti-blocking slidingblock, the anti-blocking slide block is connected with one end of a spring, the other end of the spring is fixedly connected with the anti-blocking base, the spring can drive the anti-blocking sliding block to move in the direction of one side of the grout outlet channel, one end of the grout outlet channel is blocked, the anti-blocking sliding block is used for blocking the end face of the groutoutlet channel, when cement grout sprayed out of the grout outlet channel acts on the end face, acting force enabling the anti-blocking sliding block to be away from the grout outlet channel can be generated, the anti-blocking device can effectively avoid blocking of the grout spraying hole of the mixing pile drill rod, and waste piles are prevented from being formed.

Description

technical field [0001] The invention relates to the technical field of foundation treatment construction equipment, in particular to an anti-blocking device and working method for a stirring pile drill rod. Background technique [0002] The deep cement mixing pile uses cement as a curing agent, and the clay, soft soil or sand and the curing agent are forcibly mixed in the foundation by a deep mixing machine, so that the soft foundation is hardened and the strength of the foundation is improved. [0003] In actual construction, when the drill pipe of the mixing pile starts to rotate and drills into the soil layer to the design depth and begins to lift, the mortar pump will continuously spray out the cement slurry that has been mixed through the grout hole at the bottom of the drill pipe. The rod drives the rotation of the drill fin, forcing the soil layer around the drill rod to mix with the cement slurry to form a cement-soil pile. The inventor found that due to the pressur...

AI Technical Summary

Problems solved by technology

The inventor found that due to the pressure generated by the friction between the drill pipe and the surrounding soil when the drill pipe is drilled and the soil quality, the spray hole will be blocked, causing the spray hole to fail to spray, resulting in cement-soil piles failing due to insufficient cement mixing. If the design requirements are not met, waste piles will be formed, which will affect the quality of the project

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