A construction method of special-shaped piles with carbon fiber bag cast-in-place anti-arch curved surface combination

Abstract

The invention relates to a carbon fiber cloth bag cast-in-situ anti-arch curved surface combined irregular-shaped pile, which is characterized in that the upper part of the combined irregular-shaped pile is a round pile body while the lower part thereof is an anti-arch curved surface pile body, and the pile bottom is provided with an irregular-shaped prefabricated pile tip. A carbon fiber cloth bag wraps the outside of the pile body; a steel sleeve with a reinforcing plate is arranged on the top part of the combined irregular-shaped pile; a vertical drain body is filled in the cavity at the outer side of the round pile body; a vertical drain pipe communicated with the vertical drain body is preset in a cast-in-situ cover plate on the top part of the pile. The carbon fiber cloth bag arranged on the outer side of the pile body can reinforce the pile body, improve the stress performance of the pile body and enhance the integrity of the pile body; the section of the pile body on the lower part is an anti-arch curved surface which can prevent influence from excessive fullness of concrete of the pile body to the lateral friction of the pile; the section of the pile body on the upper part is round and can reduce the influence from the lateral negative friction of the pile to the performance of the pile body. The invention also discloses a construction method of the combined irregular-shaped pile.

Description

technical field [0001] The present invention relates to a carbon fiber cloth bag cast-in-place anti-arch curved composite special-shaped pile and its construction method, in particular to a composite special-shaped pile with a circular upper part, an anti-arch curved bottom and carbon fiber cloth on the outer side of the pile, which belongs to the foundation In the treatment field, it is suitable for foundation treatment projects in soft soil areas and under-consolidated soil areas. Background technique [0002] In recent years, with the increasing shortage of land resources, more and more engineering projects need to be constructed in areas with deep soft foundations, insufficient soil consolidation, and deep bearing layers. The foundation soils in these areas mostly exist There are many objective conditions that are not conducive to engineering construction, such as large settlement deformation, low bearing capacity of the foundation, and so on. In addition, because the s...

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Problems solved by technology

[0006] In summary, the existing research results have achieved good reinforcement effects under suitable engineering conditions, such as special-shaped piles can improve the mechanical performance of the pile body, and the bag construction is fast, etc., but there are still some deficiencies, mainly reflected in the special-shaped piles. The durability of the pile is poor, the ability to resist negative friction resistance is insufficient, the weak part of the pile body is easily damaged, and the construction process is complicated.

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