a pullout pile

Abstract

The invention provides an uplift-resistant pile, belonging to the technical field of pile foundation engineering, comprising a pile body and a pile head, and the pile head is movably arranged at the lower part of the pile body. There is a base plate at the bottom of the pile body, and a boss matching the pile head is provided on the lower surface of the base plate. The one-way grouting pipe runs through the base plate and the boss. The sub-shells are spliced, the diameter of the bottom is not larger than the diameter of the pile body, avoiding the gap between the pile body and the soil layer, ensuring the verticality of the pile body and the friction between the pile body surface and the soil layer; injecting high-pressure concrete into the pile head When grouting, the sub-shell expands, forming an expanding head at the bottom of the pile body, and the continuous high-pressure concrete slurry overflows and combines with the soil layer to form a cement stone body, which can prevent underground mud from mixing into the expanding head, thereby ensuring the structural strength of the expanding head The pores formed during the opening of the pile head are filled in time by the injected concrete slurry, and no pores will be formed at the bottom of the pile body, effectively ensuring the compressive performance of the pile body.

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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