Cast-in-place concrete pile with expanded-diameter threaded pile section, drill bit device for pile forming and pile forming method

Abstract

The invention relates to a cast-in-place concrete pile with an expanded-diameter thread pile section, a drill bit device for pile forming and a pile forming method. The cast-in-place concrete pile with the expanded-diameter threaded pile section comprises a concrete main body pile, and the concrete main body pile is composed of a pile bottom, a pile body and a pile top; the shape of the pile bottom is an expanded head structure formed by extending the concrete main body pile to the periphery through re-compacted concrete; the cast-in-place concrete pile is provided with a thread pile section and at least one expanded-diameter thread pile section, and the thread pile section is formed by spirally coiling threads which are of an integrated structure and protrude outwards on the outer edge ofthe concrete main body pile; the expanded-diameter threaded pile section is formed by extending part of the threaded pile section to the periphery through re-compacted concrete, and the outer diameter of the outer edge of the expanded-diameter threaded pile section is larger than that of the outer edge of the threaded pile section; and the thread pile section and the expanded-diameter thread pilesection are arranged on the pile body and / or the pile top. The cast-in-place concrete pile is suitable for soil layers such as filled soil, cohesive soil, silt and sandy soil, one-time pile forming is achieved, and the high bearing capacity is achieved.

Description

technical field [0001] The invention belongs to the field of building construction foundation pile construction, and in particular relates to a concrete pouring pile with an enlarged-diameter screw pile section, a drill bit device for pile formation, and a pile formation method. Background technique [0002] In the existing building pile foundation construction, for the geological conditions of cohesive soil, silt soil, sandy soil and filling soil, the soil around the pile is mostly reinforced with cement slurry, and then the construction of rigid concrete piles is carried out, so that Get a higher carrying capacity. But there are also serious deficiencies: one is that the same pile needs to be constructed twice, and the construction cost is high; the other is that grout is poured into the ground, which pollutes the groundwater environment; This leads to large differences in reinforcement results; fourth, the cost of pile formation is high; fifth, this type of pile is mainl...

AI Technical Summary

Problems solved by technology

But there are also serious deficiencies: one is that the same pile needs to be constructed twice, and the construction cost is high; the other is that grout is poured into the ground, which pollutes the groundwater environment; This leads to large differences in reinforcement results; fourth, the cost of pile formation is high; fifth, this type of pile is mostly based on side resistance, and the soil stress at the bottom of the pile has not been fully utilized

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