Large-diameter extension arm type steel pipe pile and construction method thereof

Abstract

The invention relates to a large-diameter extension arm type steel pipe pile and a construction method thereof. The large-diameter extension arm type steel pipe pile comprises a pile body and a pile tip; the pile body is of a steel pipe structure; the pile tip is of a circular table structure; the bottom of the circular table structure is opened; the pile body and the pile tip are integrally formed; a partition plate is arranged in the pile body and divides an inner cavity of a pile body steel pipe into an upper cavity body and a lower cavity body; the upper cavity body and the lower cavity body are mutually independent; the pile body of the upper cavity body is connected with extension arms; the extension arms can stretch towards the outer side of the pile body and are inserted into a soil body; the extension arms are of hollow structures; one ends of the hollow structures are closed; the other ends of the extension arms are opened; the upper cavity body communicates with the hollow structures through openings; and the extension arms are perpendicular to the pile body. Side friction force and bearing force of the steel pipe pile are increased substantially, and the steel pipe pileis suitable for strengthening of a building foundation.

Description

technical field [0001] The invention relates to the technical field of steel piles, in particular to a large-diameter outrigger steel pipe pile and a construction method thereof. Background technique [0002] Engineering piles are divided into concrete piles, steel piles and composite material piles according to the pile material; [0003] Large-diameter steel pipe piles are a kind of steel piles, which have the advantages of light weight and high bearing capacity. At present, they are widely used in marine engineering. However, the side wall of the steel pipe pile is smooth and the friction coefficient of the pile body is low. In view of this, the steel pipe pile is rarely used to strengthen the building foundation. [0004] In response to the above defects, the Chinese patent (publication number: CN106869106A) proposed a method for reinforcing the foundation with welded flank-type steel pipe piles. When the length of the ordinary steel pipe pile reaches two-thirds of the ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a large-diameter outrigger steel pipe pile, which can solve the technical problems of smooth side wall and low bearing capacity of existing steel pipe piles, so that the side friction resistance and bearing capacity are greatly improved, and can be applied to construction reinforcement of the foundation

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