Cast-in-place concrete pile with mixing layer wrapped pile section, drill bit for pile forming and construction method

Abstract

The invention relates to a cast-in-place concrete pile with a mixing layer wrapped pile section, a drill bit for pile forming and a construction method. The cast-in-place concrete pile with the mixing layer wrapped pile section is composed of a pile body section and a pile bottom section; the pile body section at least comprises one mixing layer wrapped pile section; and the mixing layer wrapped pile section is arranged at the bottom end and / or the middle portion and / or the top end of the pile body section. According to the mixing layer wrapped pile section, the periphery of a pile body of a foundation pile section is wrapped by a mixing layer which has a certain thickness and is formed by a mixture formed by stirring and mixing pile side soil and concrete through an extruding and expanding protruding block of the drill bit, and the mixing layer wrapped pile section and the pile body of the foundation pile section are fixedly connected into the integrated pile section; the bearing capacity of the created pile is high, the controllability of the outer diameter of the mixing layer is good, the extruding and expanding protruding block in an expanding sliding block in the drill bit has the soil extruding effect during work, and threaded pile sections with different expanding diameters can be formed; and the drill bit for pile forming is simple in structure, has the soil extruding and hole forming functions, and is small in residual soil emission, easy to operate during pile forming construction, good in pile forming quality controllability, high in work efficiency and free of vibration and mud during construction.

Description

technical field [0001] The invention belongs to the field of construction pile construction, and in particular relates to a concrete pouring pile with a mixing layer wrapped pile section, a drill bit for pile formation and a construction method Background technique [0002] Among the existing building pile foundations, cast-in-place concrete piles have strong advantages: the pile diameter is large, and the pile length can be determined according to engineering geology and design requirements, especially for engineering projects with large fluctuations in the bearing layer, the pile length The changes are large and the application advantages are prominent. Most of these piles are cylindrical piles with the same diameter, and the stress effect between the pile and soil has not been fully utilized, which cannot meet the energy-saving requirements. Contents of the invention [0003] In view of the above-mentioned existing technical problems, one of the purposes of the inventio...

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Problems solved by technology

[0002] Among the existing building pile foundations, cast-in-place concrete piles have strong advantages: the pile diameter is large, and the pile length can be determined according to engineering geology and design requirements, especially for engineering projects with large fluctuations in the bearing layer, the pile length The changes are large, and the application advantages are prominent. These piles are mostly cylindrical piles with the same diameter, and the stress effect between the pile and the soil has not been fully utilized, which cannot well meet the energy-saving requirements.

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