Grouting pipeline structure, X-shaped special-shaped pile for prefabricating grouting pipeline and grouting method thereof

Abstract

The invention discloses a grouting pipeline structure. The grouting pipeline structure comprises a longitudinal pipeline, an annular pipeline and at least one extension pipeline; the extension pipelines are leaded out from the annular pipeline; the plane of the annular pipeline is perpendicular to the extension pipelines in the space position; and the longitudinal pipeline is communicated with the annular pipeline. An X-shaped special-shaped pile is used for prefabricating the grouting pipeline structure; at least one set of grouting pipeline structures is arranged at the middle part of a pile body of the X-shaped special-shaped pile; the longitudinal pipeline is arranged in the axial direction of the pile body; and the annular pipeline is arranged around the pile body. The invention further discloses a grouting method of the X-shaped special-shaped pile; a pile side back grouting method is applied to the X-shaped pile construction; and multiple sections of the pile body are grouted through the grouting pipelines preset in the pile body, so that the contact interface characteristics of the pile body and soil around the pile are changed, the side friction resistance is compensated, the bearing capacity of the pile is improved, and the deformation is reduced. The grouting pipeline structure is higher in flexibility and reliability, is higher in adaptability to different engineering, simplifies the construction flow, achieves recycling, and accords with the concepts of economization and environmental protection.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering, and relates to a prefabricated grouting pipeline device and a grouting method in an X-shaped special-shaped pile. Background technique [0002] As a special deep foundation, the pile foundation has the advantages of high bearing capacity, small settlement, convenient fabrication, flexible layout and wide application conditions. fields are playing an increasingly important role. [0003] The X-shaped pile is a new type of pile that has been developed recently and uses the principle of equal cross-section and special-shaped peripheral expansion to increase the surface area of ​​the pile side. Compared with the traditional circular cross-section, it has a larger perimeter-area ratio. When the cross-sectional area is the same, the circumference and moment of inertia of X-shaped piles are larger than that of circular piles and square piles. Assuming that the frictional resistance per unit late...

AI Technical Summary

Problems solved by technology

However, due to various reasons in actual engineering, X-shaped piles still encounter insufficient side friction resistance, large pile settlement and deformation, which will have adverse effects on project quality and safety.

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