Precast perforated pipe pile and preparation method

Abstract

The invention provides a precast perforated pipe pile. A perforated pipe and concrete arranged in and out the perforated pipe form a pipe body, and the outer wall of the pipe body is provided with a self-tapping screw which is a spiral bump arranged on the outer wall of the pipe body. The bottom end of the pipe body is a flat head or a tip head, and the top end of the pipe body is a multi-face column and is externally sheathed with a side limited ring. The side limited ring is in a horn shape, and foundation soil is arranged between the pipe body and the side limited ring. The preparation method of the precast perforated pipe pile comprises the following steps: the perforated pipe is manufactured by steel pipes with different specifications, and the thickness is larger than 2 mm; the aperture of perforated holes in the perforated pipe is manufactured by a cutting mode and is determined according to the grain diameter of stone in the concrete, and the distribution of the perforated holes from the pile top to the pile end is determined according to the distribution characteristics of additional stress of the pile; the spiral bump of the outer pipe of the perforated pipe is determined according to the bearing capacity of single pile and the rotational torque; and a variety of parameters of the perforated pipe precast pile are determined according to shared building load, final foundation deformation, foundation soil conditions and conditions for affecting pile sinking.

Description

technical field [0001] The invention belongs to the building foundation construction technology, in particular to a prefabricated flower pipe pile and a preparation method thereof. Background technique [0002] Under current conditions, the existing prefabricated pile construction is mostly completed by using large-scale equipment and tools—large-scale drilling equipment, high-tonnage static pressure pile equipment and supporting equipment and factories. Therefore, equipment transportation and on-site construction are very difficult, and the amount of electricity or fuel oil is large; affected by the combination of multi-layer, multi-phase, and multi-mechanical properties of the foundation soil, the process of hole formation and pile sinking is complicated—drilling requires different drills. Matching tools and static pressure piles require pilot holes to press the piles to the design depth, which makes the process complicated. Any problem in any process link can lead to proc...

AI Technical Summary

Problems solved by technology

Therefore, equipment transportation and on-site construction are very difficult, and the amount of electricity or fuel oil is large; affected by the combination of multi-layer, multi-phase, and multi-mechanical properties of the foundation soil, the process of hole formation and pile sinking is complicated—drilling requires different drills. Matching equipment and static pressure piles require pilot holes to press the piles to the design depth, which leads to complex processes. Any problem in any process link may lead to process failure or engineering hidden dangers

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