Pile making device and pile making method for soil-displacement reinforced concrete screw piles

Abstract

A pile making device for soil-displacement reinforced concrete screw piles comprises a steel mould pipe with an external helix, the steel mould pipe penetrates through a base of a piling machine, a reinforced concrete pile shoe is sleeved to the bottom of the steel mould pipe, a rotary power head is disposed at the upper end of the steel mould pipe, a cross connector is arranged on the lower portion of the steel mould pipe, a steel hoop with notches at one end is welded at the top end of the steel mould pipe, the grooves match with the cross connector, clamps are arranged between the steel hoop and a base of the rotary power head, and an auxiliary rotational power device is disposed in the middle of the steel mould pipe. A pile making method includes: pre-embedding the pile shoe at a pile position, and connecting the pile shoe to the steel mould pipe in a sleeved manner; integrally connecting the rotary power head to the steel mould pipe through the pile-top clamps; starting the power head to screw the steel mould pipe into a soil layer to a designed height; confirming no water or mud entering the steel mould pipe, placing a reinforcement cage into the steel mould pipe, and fully filling the steel mould pipe with concrete; reversely turning the power head; and checking the height of the concrete in the steel mould pipe to confirm the size of an external helix of the pile, and directly turning the steel mould pipe to leave the soil layer to form the screw pile. The pile making device and the pile making method have the advantages that bearing capacity is high, pile forming quality is high, and the pile making device and the pile making method are especially applicable to making of screw piles in the deep, thick and soft soil layer.

Description

technical field [0001] The invention relates to a pile foundation of civil construction engineering, in particular to a pile-forming device and a pile-forming method of a soil-squeezing reinforced concrete screw pile for supporting superstructures in a deep saturated soft clay stratum. Background technique [0002] Such as the invention patent of Chinese patent application number 200610019756.6 "screw pile, screw pile pile forming equipment and pile forming method", the structure of the pile forming equipment is mainly composed of body, oil cylinder, hydraulic motor, automatic control equipment, transmission pipeline, a power head Installed on the base frame of the body, the hydraulic motor is installed on the base of the body, the hydraulic motor is connected with the power head through a telescopic oil cylinder, the jig on the drill pipe is connected with the movable clamp of the power head The concrete conveying pipe is connected with the inner drill pipe, and the automat...

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Problems solved by technology

[0004] Yet the weak point of above-mentioned " screw pile, threaded pile pile-forming equipment and pile-forming method " is: it is only applicable to hillside foundation and gravel sand stratum, and can not be applicable to deep soft soil stratum; It is more difficult to control the location and quality of steel bars in the post-insertion method; the third is that it is only suitable for threaded piles with tapered shapes, and cannot be used for flat-bottomed screw piles

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