Threaded prefabricated uhpc pipe pile and its manufacturing and construction method

Abstract

The invention relates to a prefabricated UHPC tubular pile with a thread and a manufacturing and construction method of the prefabricated UHPC tubular pile. The prefabricated UHPC tubular pile with the thread comprises a concrete tubular pile body. The concrete tubular pile body is composed of a pile cap, a pile body and a pile bottom cone. The pile cap is arranged on the upper portion of the pile body, the pile bottom cone is in an inverted cone shape and is arranged on the lower portion of the pile body, spiral concrete ribs are arranged on the periphery of the pile body from top to bottom, the concrete ribs spirally stretch to the pile cap from the pile bottom cone at equal thread pitches, and alloy steel sheets are arranged on the surfaces of the concrete ribs. The tubular pile is simple in structure and good in strength, the settling problem of a pile foundation is relieved, the advantages of being good in fluidity and high in strength of super-high performance concrete are utilized, the concrete ribs have high strength, can bear high soil pressure without being pressed to be damaged, and can provide large mechanical engaging force and frictional resistance, the surfaces of the concrete ribs are wrapped by the alloy steel sheets, the concrete ribs are well protected, the concrete tubular pile body looks like a drill with a blade, the pile body can be rotationally pressed in for piling construction, and piling speed is greatly increased.

Description

technical field [0001] The invention relates to a threaded prefabricated UHPC pipe pile and a manufacturing and construction method thereof. Background technique [0002] The large settlement of the pile foundation, especially the uneven settlement will cause the original statically indeterminate structure to generate a large secondary internal force, causing cracking or even destruction of the structure. Especially in soft soil areas, there are higher requirements for the anti-settlement ability of pile foundations. For friction piles, it is often necessary to increase the pile length to obtain greater frictional resistance, which greatly increases the cost. It is more likely to be uprooted and damaged by other effects such as groundwater, which will also cause serious damage to the upper structure, and the later maintenance and correction costs are high and difficult. The traditional prefabricated piles only have solid square piles and tubular piles, which have poor stren...

AI Technical Summary

Problems solved by technology

[0002] The larger settlement of the pile foundation, especially the uneven settlement, will cause the original statically indeterminate structure to generate a large secondary internal force, causing cracking or even destruction of the structure

Especially in soft soil areas, there are higher requirements for the anti-settlement ability of pile foundations. For friction piles, it is often necessary to increase the pile length to obtain greater frictional resistance, which greatly increases the cost. It is more likely to be uprooted and damaged by other effects such as groundwater, which will also cause serious damage to the upper structure, and the later maintenance and correction costs are high and difficult

Traditional prefabricated piles only have solid square piles and tubular piles, which have poor strength and cannot provide great mechanical bite force and frictional resistance

At the same time, general prefabricated piles often use static pressure method and hammering method, the piling speed is slow and the construction will cause noise pollution

The settlement or uplift of the existing piles will cause damage to the superstructure, while the friction piles often need to increase the pile length to ensure sufficient soil frictional resistance, resulting in an increase in cost

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