Uplift pile

Abstract

The invention provides an uplift pile, and belongs to the technical field of pile foundation engineering. The uplift pile comprises a pile body and a pile head, wherein the pile head is movably arranged at the lower part of the pile body; and a bottom plate is arranged at the bottom of the pile body, a boss matched with the pile head is arranged on the lower surface of the bottom plate, a one-waygrouting pipe penetrates through the bottom plate and the boss, and the arrangement of the boss can prevent the pile head from deviating in the pile driving process. The pile head is formed by splicing a plurality of sub-shells, and the diameter of the bottom of the pile head is not larger than that of the pile body, so that a gap is prevented from being formed between the pile body and a soil layer, and perpendicularity of the pile body and friction between the surface of the pile body and the soil layer are guaranteed; when high-pressure concrete slurry is injected into the pile head, the sub-shells expand, an expanded head is formed at the bottom of the pile body, and the continuously-introduced high-pressure concrete slurry is combined with the soil layer to form a cement stone body after overflowing so that underground slurry can be prevented from being mixed into the expanded head, and therefore the structural strength of the expanded head is guaranteed; and holes formed in the opening process of the pile head are filled with the injected concrete slurry in time, and no hole is formed in the bottom of the pile body, so that the compression resistance of the pile body is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of pile foundation engineering, in particular to an uplift-resistant pile. Background technique [0002] Pull-out piles are widely used in anti-floating of large basements, pull-out resistance of high-rise buildings, pull-out resistance of offshore dock platforms, anchor pile foundations of suspension bridges and cable-stayed bridges, pile foundations of large dock floors, and anchor pile foundations in static load test piles and other fields. When a part of the underground structure of the construction project is lower than the water level of the surrounding soil, uplift piles need to be installed to offset the buoyancy force generated by the water in the soil on the underground structure of the construction project, so as to ensure the stability of the construction project. [0003] Existing anti-uplift piles are mainly manufactured by cast-in-place method, and the technological process mainly includes: d...

AI Technical Summary

Problems solved by technology

However, the enlarged head of the uplift pile of this patent is only formed by the opened sleeve plate, and its structural strength and the buoyancy that it can bear are all extremely low; The lower part of the plate leaves unfilled coating gaps, so that the pile body is in a suspended state, which will greatly affect the pressure bearing performance of the pile body, and the opening of the sleeve plate depends entirely on the core rod to provide the slide. block strength, which requires that the core rod must provide a constant pulling force for the slider during the entire life of the pile, otherwise, the stretched casing is very easy to be under the pressure of the upper coating or when the pile floats up. Closed again, thus completely losing the pull-out function

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