Large-diameter pile foundation reinforcement cage centering device

Abstract

A large-diameter pile foundation reinforcement cage centering device comprises a thickened steel casing, a reinforcement cage, a fender pile system and a centering system, four fender piles are arranged on the ground around a pile hole and connected through a pull rope, a pull rope tensioning device is arranged on the pull rope, a GPS receiver is installed on the top face of a bracket, and a laser transmitter and a video monitoring system are installed on the bottom face of the bracket. By the adoption of the device, the potential safety hazard existing in a large-diameter pile foundation handheld plumb bob can be effectively solved, pedal erecting is omitted, and the safety of a large-diameter pile foundation handheld plumb bob is improved. Through primary centering and secondary precise centering, the automation degree of centering of the pile foundation reinforcement cage is improved, meanwhile, the centering precision is further improved, and popularization is facilitated.

Description

technical field [0001] The invention relates to the field of bored pile construction, in particular to a large-diameter pile foundation reinforcement cage centering device. Background technique [0002] In bridge engineering, the pile foundation is the structure of the foundation, which transmits the upper load. In order to ensure that the reinforcement cage in the pile foundation is in the design position, four protective pile traction wire ropes are usually used to mark the center of the pile hole at a cross point and tied at the same time. The four main bars perpendicular to each other on the top of the reinforcement cage are used to identify the center of the reinforcement cage, and finally the alignment is controlled by checking the center of the protective pile and the center of the reinforcement cage. During the on-site construction, workers often use the hand-held hanging hammer method to check the center of the retaining pile and the center of the steel cage, which ...

AI Technical Summary

Problems solved by technology

However, during the construction of large-aperture pile foundations, the distance between the center of the hole and the wall of the hole is far away, and manual measurement has certain risks; CN111455987B proposes a centering device for a reinforced cage of a bored pile, including two sets of guards arranged on the ground around the pile hole. The piles and the centering plate arranged on the steel cage, the single set of protective piles include two protective piles, the connection line between the two protective piles in the same group passes through the center of the pile hole, and the two sets of protective piles There is a first pair of centering ropes on the top, the first pair of centering ropes bypasses the piles and is arranged in a cross shape, and a downward laser transmitter is tied at the intersection point; a centering plate is set at the center of the inner circle of the steel cage, The center of the centering plate is printed with a centering qualified area

Images