Post-grouting precast hollow pipe root pile structure and construction method

Abstract

The invention discloses a post-grouting precast hollow pipe root pile structure and a construction method, and belongs to the field of buildings. The precast hollow pipe is internally provided with acement slurry cast pipe and an electric wire. A connecting part is arranged on the butt-joint part of the precast hollow pipe and is a cylinder. A plurality of radial sliding parts are evenly arrangedon the parts, on the periphery of the cement slurry cast pipe, in the cylinder. A hollow radial sliding shaft is slidably arranged on the sides, close to the cement slurry cast pipe, of the radial sliding parts. A guide pipe and the electric wire are arranged in the radial sliding shaft, and a micro welding gun is arranged at the wire end and connected to a plurality of parts of the radial sliding parts. The radial sliding shaft communicates with the cement slurry cast pipe. The upper end, in the precast hollow pipe, of the electric wire is connected with an electric welding machine. Throughthe post-grouting precast hollow pipe root pile structure provided by the structure, the bearing capacity of the precast hollow pipe pile can be improved, settlement of a pile foundation is reduced, the strength of soil layers around the pile foundation is improved, and the defects that the post-grouting technology is long in construction period, complex in process and the like are overcome.

Description

technical field [0001] The invention relates to a pipe tree root pile structure and a construction method, in particular to a post-grouting prefabricated hollow pipe tree root pile structure and a construction method, belonging to the construction field. Background technique [0002] With the continuous development of the real estate industry, the height of buildings is also getting higher and higher. The foundation is the key to the high-rise buildings. When building the foundation, foundation piles are often pressed into the foundation or holes are drilled in the ground, and then concrete is poured to form the foundation of the building. The foundation piles pressed into the foundation are generally prefabricated hollow tubes, and the end faces of the piles are provided with flanges, flanges, etc. There are multiple connecting holes on the surface, and the prefabricated hollow pipes are connected vertically by the connecting pins inserted into the connecting holes. Figure...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low bearing capacity of prefabricated hollow pipe piles, insufficient loose soil strength at the bottom of piles at the side of piles, and problems such as the complicated process and long construction period of cast-in-place concrete tree root piles and post-grouting grouting construction methods, the present invention provides a post-injection Grout prefabricated hollow pipe tree root pile structure and construction method, its purpose is to improve the bearing capacity of prefabricated hollow pipe piles, reduce the settlement of pile foundation, improve the strength of soil layer around pile foundation, overcome the long construction period of grouting technology after grouting, the construction Complicated and other shortcomings, optimize the construction method and construction structure

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