Displacement pile and construction method and drilling tool thereof

Abstract

The invention discloses a displacement pile and a construction method and drilling tool thereof. The drilling tool comprises a linear cylinder structure, a concrete blocking ring, a spiral column structure and a drill bit. The cylinder structure, the concrete blocking ring and the spiral column structure are connected fixedly and sequentially to form the integrated drilling tool. The spiral column structure comprises a cylinder pipe core and a spiral blade clockwise arranged at the outer edge of the cylinder pipe core. The cylinder pipe core is connected with the drill bit through a drill bit connector arranged at the lower end of the cylinder pipe core. The height ratio of the concrete blocking ring to the spiral column structure is 7:25, and the edge of the outer wall of the concrete blocking ring is flush with the edge of the outer wall of the spiral blade. The drilling tool is novel in structure, the pile forming quality is good, bit bouncing is not liable to occur, and environmental protection is achieved. In addition, according to the construction method of the displacement pile, in the pile forming process, a concrete blocking ring structure blocks soil from being screwed out, and the pile is formed directly through extruding and expanding. The formed pile is high in bearing capacity, good in pile forming quality, and the work efficiency is further improved.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a soil-squeezing pile, a construction method of the soil-squeezing pile and a drilling tool thereof. Background technique [0002] At present, in foundation projects such as construction, water conservancy, and highways, double-helix extruded piles are currently the most commonly used form of pile foundation. The soil that is drilled out of the hole will be squeezed into the side wall of the pile hole, and then the two-way helical closed extrusion drill bit will move upwards and rotate again to squeeze and expand the pile hole. Squeeze into the side wall of the pile hole, and start the concrete pump to press the pile material into the pile hole while the topspin is lifted. The main problem is that the soil is rotary excavated first, then transported upwards and then squeezed to the pile walls on both sides. Therefore, the rotated soil will block the transpo...

AI Technical Summary

Problems solved by technology

The main problem is that the soil is rotary excavated first, then transported upwards and then squeezed to the pile walls on both sides, so the rotated soil will block the transportation path formed by the rotating blades, and it is easy to cause the drilling phenomenon

Moreover, the discharged soil or mud increases the difficulty and progress of pile construction.

[0003] The announcement number (CN103556628A), the Chinese patent on the publication date (2014-02-05), discloses a construction method of a spiral vertebral soil extruding pile. Good, high efficiency, but in the actual pile construction process, its overall spiral cone structure will cause the soil in the pile to be unscrewed, and the muck needs to be transported outside, which affects the progress of the construction

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