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

A technology of large-diameter steel pipe piles, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of smooth side walls and low bearing capacity, and achieve the effects of reduced consumption, low earth pressure, and convenient operation

Active Publication Date: 2018-11-13
HEFEI WISDOM DRAGON MACHINERY DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as Figure 1-3 Shown: a large-diameter outrigger steel pipe pile, including a pile body 1 and a pile point 2, the pile body 1 is a steel pipe structure, the pile point 2 is a circular platform structure with an open bottom, and the pile body 1 Formed integrally with the pile tip 2, a partition 13 is arranged inside the pile body 1, and the partition 13 separates the inner cavity of the steel pipe of the pile body into an upper chamber 11 and a lower chamber 12 that are independent of each other; The lower cavity (the cavity of most of the pile body) can be filled through the soil plug that enters the lower cavity through the pile tip opening, reducing the amount of cement slurry;

[0042] The pile body of the upper cavity 11 is connected with an outrigger 4 that can protrude to the outside of the pile body 1 and insert into the soil; after the outrigger is inserted into the soil, the side friction and bearing capacity of the steel pipe pile are greatly increased. ...

Embodiment 2

[0056] Embodiment 2 is the construction method of Embodiment 1, and the specific method is: a construction method of a large-diameter outrigger type steel pipe pile, and its specific steps are as follows:

[0057] 1) Provide a large-diameter outrigger steel pipe pile as described in Embodiment 1;

[0058] 2) Set out the line to determine the pile position, use the lifting ring to suspend the large-diameter outrigger steel pipe pile directly above the pile position, and align the pile tip with the middle position of the pile position;

[0059] 3) Start the pile driver, and slowly insert the large-diameter outrigger steel pipe pile into the foundation;

[0060] 4) When the pile body reaches the predetermined depth, cover the pile cover 3, use a high-pressure air pump to inject high-pressure gas into the upper cavity through the high-pressure inflation hole 31 on the pile cover 3, and stabilize the pressure for 10 to 15 minutes to ensure that the The outrigger 4 is fully stretch...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/48E02D5/50E02D5/62
CPCE02D5/48E02D5/50E02D5/62
Inventor 胡振华王颖张宪堂李朋高兴政
Owner HEFEI WISDOM DRAGON MACHINERY DESIGN CO LTD
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