Anti-floating construction method and device for large-diameter cast-in-situ bored pile steel reinforcement cage

Abstract

The invention discloses an anti-floating construction method and device for a large-diameter cast-in-situ bored pile steel reinforcement cage. The method comprises the steps that the welded steel reinforcement cage is perpendicularly placed in a large-diameter cast-in-situ bored pile; the top of the steel reinforcement cage is higher than the height of an opening of a large-diameter bored hole; a steel tube frame is arranged on the top of the steel reinforcement cage, and counter weights are arranged on the steel pipe frame; perfusion construction is carried out; the steel reinforcement cage is prevented from floating through the counter weights in the perfusion process, and therefore the perfusion quality of the large-diameter cast-in-situ bored pile steel reinforcement cage is ensured. The method and device are suitable for constructing hole pile steel reinforcement cages with the diameter of 3m and more than 3 m in a cast-in-situ bored (stamped) pile and have the advantages of being obvious in anti-floating effect, easy to manufacture and mount, low in investment cost and the like.

Description

technical field [0001] The invention relates to an anti-floating construction method and device for a steel cage of a large-diameter bored cast-in-situ pile and belongs to the technical field of construction of cast-in-situ piles for buildings. Background technique [0002] During the construction of cast-in-situ concrete piles, the force on the reinforcement cage is caused by the friction of the floating friction generated by the upward movement of the mud and concrete mixture, the friction of the buried deep concrete, the self-weight of the reinforcement cage and the fixation of the reinforcement cage. The resultant force of the pressure, if the floating force exceeds the downward force, the steel cage will float up, which directly affects the construction quality of the drilled (punched) hole grouting pile. Contents of the invention [0003] The object of the present invention is to provide a large-diameter bored pile reinforcement cage anti-floating construction method...

AI Technical Summary

Problems solved by technology

[0002] During the construction of cast-in-place concrete piles, the force on the reinforcement cage is the friction caused by the float and the buried depth of the lower part when the mud and concrete mixture move upward. The resultant force of the friction of concrete, the self-weight of the steel cage and the pressure generated by the fixing of the steel cage, if the floating force exceeds the downward force, the steel cage will float up, which directly affects the construction quality of the drilled (punched) hole cast-in-situ pile

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