A kind of rotary excavation pile and its construction method

Abstract

The invention relates to a rotary excavation pile and a construction method thereof. The rotary excavation pile comprises a protective tube, a reinforcing bar cage arranged in the protective tube, and a concrete body cast and formed in the protective tube. A number of positioning groups are arranged at intervals along its axis direction, the positioning group includes at least three positioning blocks fixedly connected with the reinforcement cage, and all positioning blocks in each group of positioning groups are spaced with the axis of the reinforcement cage as the central axis distributed. The positioning block is located on the outer wall of the steel cage, so that when the steel cage is displaced due to external force during the installation process, the positioning block will interfere with the inner wall of the casing to avoid collision and damage between the steel cage and the inner wall of the casing. A protective effect is achieved, thus, the present invention has the advantage of protecting the casing and the reinforcement cage during construction.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a rotary excavation pile and a construction method thereof. Background technique [0002] Rotary excavation pile, the full name of rotary excavation bored cast-in-place pile, generally refers to the pile type constructed by rotary drilling rig. During the construction of the rotary excavation pile, it is necessary to bury the casing first and then dig holes. After the dug holes are cleaned, the reinforcement cage should be placed. The reinforcement cage should sink steadily during the placement process to avoid the reinforcement caused by collision with the inner wall of the casing Cage and shield damage. [0003] However, in the actual placement process, since the hoisting machine and the steel cage are only connected by the hook at the top, and the steel cage itself is very long, it is easy to be displaced by wind, vibration and other factors, resulting in the st...

AI Technical Summary

Problems solved by technology

[0003] However, in the actual installation process, since the hoisting machine and the steel cage are only connected by the uppermost hook, and the length of the steel cage itself is very long, it is easy to be shifted by factors such as wind blowing and vibration, resulting in the reinforcement cage Collision damage with the inner wall of the casing

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