Bored cast-in-place pile casing and using method thereof

Abstract

The invention relates to a bored cast-in-place pile casing. The casing comprises a cylindrical tubular casing body, a cutting seam and a plurality of buckles, wherein a pair of lifting lugs is oppositely arranged on the two sides of one end of the casing body. The casing is characterized in that the casing body (1) is formed by rolling a steel plate with the wall thickness of 6 to 8mm; the internal diameter of the casing body is 100m more than the diameter of a pile body; the cutting seam (3) is formed on the side wall of the casing body, is a through long cut which is formed along the height direction and penetrates through the two ends of the casing body, and has the width of 5mm; a plurality of buckles (2) are respectively arranged at the upper and lower ends of the cutting seam (3) and averagely arranged between the upper and lower ends; the distance between two buckles (2) is 250 to 350mm; and each buckle (2) comprises a buckle tail (4), a buckle bolt (5), a buckle check ring (6) and a hexagonal nut (7).

Description

technical field [0001] The invention relates to a bored cast-in-situ pile in underground engineering, in particular to a bored cast-in-place pile casing and a method for using the same. Background technique [0002] Bored piles in underground engineering, as a kind of pile foundation, are widely used in high-rise, super high-rise buildings and heavy structures. After the pile driver is installed and in place in the construction of bored piles, an important process is to bury the casing. The casing is generally made of 6-8mm steel plate, with an inner diameter 100mm larger than that of the pile body, buried beyond the depth of miscellaneous fill, and not less than 0.2m into the original soil. In addition to preventing hole collapse, isolating surface water, protecting orifice ground, fixing pile hole position and drill bit guide, the casing has conventional functions. However, in the construction process of the known bored pile casing, there is a difficulty that the distanc...

AI Technical Summary

Problems solved by technology

However, in the construction process of the known bored pile casing, there is a difficulty that the distance between the natural ground and the designed pile height cannot meet the requirements of the concrete superfill height, and the concrete pouring measures are not appropriate, so it is difficult to ensure the strength of the pile top concrete, and There is also the problem that the casing is not easy to pull out after the concrete reaches the strength

[0003] Therefore there are above-mentioned inconveniences and problems in the known bored pile casing

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