Cast-in-place pile concrete vibration device

Abstract

The invention discloses a cast-in-place pile concrete vibration device. The cast-in-place pile concrete vibration device comprises a base, an inner pipe, a vibration device body and steel chisel bars, the base is provided with an inner pipe insertion opening, the inner pipe penetrates through the base from the inner pipe insertion opening, a gap is formed between the outer wall of the inner pipe and the inner pipe insertion opening, the inner pipe is elastically connected with the base, the vibration device body is fixed to the upper end of the inner pipe, and a plurality of steel chisel bars are annularly arranged at the lower end of the inner pipe along the pipe wall and extend downwards. The concrete in the cast-in-place pile is more full and compact, when the cast-in-place pile is applied to the pipe-sinking cast-in-place pile, the steel pipe can be prevented from being hung with a reinforcement cage, the concrete can be prevented from blocking the steel pipe, necking is prevented, and damage to the steel pipe during pipe drawing is reduced.

Description

technical field [0001] The invention relates to the technical field of cast-in-situ piles, in particular to a concrete vibrating device for cast-in-situ piles. Background technique [0002] The pile foundation is a common building foundation, and the pile foundation is used to support the building above, which plays a vital role in the building. Common pile foundations can be divided into prefabricated piles and cast-in-situ piles according to the construction method. The prefabricated piles are prefabricated by the reinforced concrete piles, and then the prefabricated reinforced concrete piles are driven into the ground through the pile machine, while the cast-in-place piles are firstly driven on the construction site. When the predetermined depth is reached, the reinforcement cage is put in and the concrete is poured. [0003] Common cast-in-place piles include rotary-dug cast-in-place piles, punch-drilled cast-in-place piles, artificial hole piles, and immersed tube cast...

AI Technical Summary

Problems solved by technology

[0003] Common cast-in-place piles include rotary-dug cast-in-place piles, punch-drilled cast-in-place piles, artificial hole piles, and immersed tube cast-in-place piles. The steel cage is installed in the pile hole, and the concrete is poured into the pile. When the concrete is poured, the concrete segregation, lack of compactness, and poor filling degree are easy to occur. tube) Use a pile driver to push down the pile tip, sink the steel tube and the pile tip into the soil layer, place a steel cage in the steel tube, then pour concrete into the steel tube, and finally pull out the tube to form a pile. The following problems occurred: when the pipe was pulled out, the steel pipe was hung with a steel cage, causing the steel cage to float; the concrete blocked the steel pipe; after the concrete was poured, the concrete was not filled and dense; during the pipe pulling process, the vibration or hammering of the steel pipe caused damage to the steel pipe Scrapped; during the pipe pulling process, the concrete is squeezed by the retractive force of the soil around the steel pipe, resulting in necking

The above-mentioned device pre-solves the problems of blocked pipes, hanging steel cages and uncompacted concrete, but the following problems exist in actual construction: due to the rigid connection between the counterbore steel pipe and the guide pipe, when the vibrator vibrates, it drives the counterbore steel pipe and the guide pipe to vibrate together , because the countersunk steel pipe is in contact with the pile driver and the soil layer, the vibration will act on the pile driver and the soil layer at this time, which weakens the vibration effect on the concrete, cannot effectively vibrate the concrete, and is easy to cause damage to the pile driver. Damage; due to processing errors and deformation, the counterbore steel pipe and the guide pipe cannot be a standard cylindrical shape. If the guide pipe is too long, it will interfere with the inner wall of the counterbore steel pipe, so that the guide pipe cannot be inserted into the counterbore steel pipe; pre-vibrating concrete requires setting The longer guide pipe, when pouring concrete, the concrete enters along the guide pipe, and the guide pipe reduces the concrete volume in the countersunk steel pipe, resulting in insufficient concrete pouring volume, and the concrete cannot reach the design pile top elevation after pipe pulling; due to the shrinkage of the guide pipe The diameter of the concrete after the original countersunk steel pipe is poured into concrete is reduced, and the concrete needs to expand a greater distance to fill the pile hole during the pipe pulling process, which is more likely to cause necking

Therefore, the technical solution in this patent document is not ideal for solving the common problems in the construction process of sinking pipe grouting piles, and it cannot be applied to piles without sinking steel pipes such as rotary digging piles, punching bored piles, artificial hole piles, etc. holes, a device that can effectively solve the above technical problems is currently needed

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