Static pressure prestressed pipe pile construction method

Abstract

The invention provides a static pressure prestressed pipe pile construction method. The static pressure prestressed pipe pile construction method comprises the following steps that a plurality of unit pipe piles are prepared; measuring and setting out are conducted, and pile positions are determined; guide holes are drilled and tapped in the centers of the pile positions; pile presses are in place and centered; a front pipe pile is pressed into an underground soil body; the piles are spliced through pin rods; the piles are spliced and welded; and after the steps are repeated for multiple times, construction is finished. By the adoption of the technical scheme, the guide holes are formed in the ground in advance for guiding, the pin rods are used for positioning during pile splicing, it is guaranteed that every two adjacent pipe piles are aligned, the pile splicing connecting position is arranged at the position 0.5 m to 1 m away from the ground, welding operation is facilitated, the perpendicularity of the pipe piles relative to the ground is also conveniently adjusted, deflection is effectively prevented when the pipe piles are pressed in, air holes are prevented from appearing in a welding seam formed after welding and cracks are prevented from appearing in the welding seam after the welding wire is baked and preheated before pile splicing and welding, the mechanical performance and strength of the welding seam are improved, the welding quality is improved, and pile breakage is avoided.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a construction method of static pressure prestressed pipe piles. Background technique [0002] In the field of construction engineering, prefabricated piles are a pile type often used in foundation treatment at present, especially prestressed pipe piles, because of their controllable quality and low price, they have developed rapidly and have a large social demand. There are manufacturers in all major and medium cities. At present, prestressed pipe piles are mainly driven by diesel hammer and static pressure pile machine static pressure in China to drive pipe piles into the foundation soil forcibly. The advantages are simple construction process, fast speed and relatively low cost. However, during the construction of prestressed pipe piles, due to the uneven soil quality of the underground soil, the prestressed pipe piles are subjected to frictional ...

AI Technical Summary

Problems solved by technology

However, during the construction of prestressed pipe piles, due to the uneven soil quality of the underground soil, the prestressed pipe piles are subjected to frictional resistance from the uneven underground soil during the process of pressing into the soil, so that the pipe piles are pressed into the soil. The deflection affects the verticality and quality of the formed pipe pile. In addition, the pile connection part of the prestressed pipe pile is in contact with the deep silt of the soil after being pressed into the soil. If the welding quality is not good, the pile is prone to breakage, which affects construction process

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