High-pressure water jet pile-forming device suitable for special-shaped filling pile and construction method thereof

Abstract

The invention discloses a high-pressure water jet pile-forming device suitable for a special-shaped filling pile. The device comprises an injection device, a suction device and a controller. The injection device comprises a hollow cylindrical shell framework and a plurality of water injection pipelines I, the outer wall of the shell framework is provided with a ring of rotatable side wall, the rotatable side wall is provided with a plurality of through holes I for placing radial high-pressure nozzles II, the high-pressure nozzle II are connected with radial openings of the water injection pipelines I, the rotatable side wall is internally provided with a rack, the shell framework is internally provided with an axial motor, an output shaft of the motor is fixedly connected with a gear, and the gear is driven by the output shaft of the motor to drive the rack to rotate so that the high-pressure nozzles II rotate along with the rotatable side wall. The opening quantity of the high-pressure nozzles II and the rotating angle of the rotatable side wall are controlled by using a controller according to a shape characteristic of a special-shaped pile, and an excavating task of any special-shaped filling pile can be met, so that the technical problem that the pile-forming device is low in universality is solved.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, and in particular relates to a device for monitoring soil displacement using hydraulic embedding and a method for using the same. Background technique [0002] With the continuous increase of demand for high-rise buildings, the shortcomings of the cylindrical cast-in-place piles widely used in building construction are too large, and the construction period is long. Therefore, in order to improve the bearing capacity of the pile foundation and reduce the overall cost of the project, the special-shaped cast-in-situ pile foundation has become a new research focus. Special-shaped cast-in-place piles are developed on the basis of cylindrical cast-in-place piles. By changing the cross-sectional shape of cylindrical cast-in-place piles, the interaction between the pile body and the surrounding soil can be improved, thereby improving the pile performance without changing the engineering quantity....

AI Technical Summary

Problems solved by technology

[0004] At present, the excavation device and construction method of special-shaped cast-in-place piles are relatively single, which can only solve specific shapes of cast-in-situ piles, and there is a defect of poor versatility

For example, diameter-expanding piles, the construction devices and construction methods used are only suitable for diameter-expanding piles, and the construction steps are complicated, requiring a lot of time, manpower and material resources, which affects the construction progress and project cost.

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