Prefabricating pipe pile construction method

Abstract

Provided is a prefabricating pipe pile construction method. The prefabricating pipe pile construction method comprises the following steps: (1) cleaning construction site and using a piling machine or a high-frequency oscillation hammer to press a prefabricating pipe pile into a foundation soil layer to a preset depth; (2) enabling a drilling machine drill bit to be aligned with the center position of the prefabricating pipe pile, performing drill bit positioning, drilling a hole to exceed the bottom end of the prefabricating pipe pile, and then moving out the drill bit; (3) hoisting an expansion head forming device through a suspension device and placing the expansion head forming device in a pile hole of the prefabricating pipe pile, performing extrusion expansion rotation cut to the position of the bottom end of the prefabricating pipe pile to form a cavity, and enabling the expansion head forming device to be suspended out of the pile hole; (4) clearing residue in the pile hole and the cavity; and (5) utilizing a concrete output device to pour concrete into the cavity arranged at the bottom end of the pile hole, and performing tamping so as to form an expansion head. The prefabricating pipe pile construction method is simple and convenient to operate, high in construction efficiency and safe, has little damage to the prefabricating pipe pile, enables the expansion head to be formed stably, effectively improves bearing capacity of the prefabricating pipe pile, and enables sedimentation deformation to be greatly reduced.

Description

technical field [0001] The invention relates to the field of foundation construction, in particular to a construction method of a prefabricated pipe pile with an enlarged head formed at the bottom. Background technique [0002] In my country's building foundation engineering, construction units use piles of various structures for foundation reinforcement. Among them, prefabricated pipe piles are widely used in the field of construction pile foundations due to their good economic and technical indicators. Prefabricated pipe piles have many advantages such as high strength, simple construction, material saving, small deformation, and stable quality. [0003] At present, the prefabricated pipe piles used in the field of construction pile foundations in my country generally rely on the frictional resistance of the soil layer on the side of the pile to provide support. Pipe piles are usually constructed in layers with low bearing capacity, so the end bearing capacity of pipe pile...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a construction method for prefabricated pipe piles, which solves the problems in the prior art that the prefabricated pipe piles pollute the environment, construction safety measures are difficult to ensure, the process of forming and expanding the head damages the prefabricated pipe piles, the forming of the expanding head is unstable, and the prefabricated pipe piles are not stable. Difficult to guarantee bearing capacity

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