Pile Quality Control Method Based on the Synchronization of Drill Lifting and Piling Speed

Abstract

The invention belongs to the field of piling machines, and particularly relates to a pile quality control method for keeping the drill lifting speed synchronous to the pile-forming speed in the drill lifting process of a long spiral pile machine. Hardware needed in the control method comprises a concrete pressure sensor on a power head bent pipe, a frequency converter, a winch driving motor, an encoder, a power supply, a main controller and a display, wherein pressure signals and rotating speed signals acquired by the concrete pressure sensor and the encoder are transmitted to the main controller; the main controller is used for performing computation to obtain a rotating speed control signal of the motor; the control signal is transmitted to a vector frequency converter; the frequency converter is used for driving the motor to rotate; the rotating speed of the motor can be controlled on the basis of the position of the encoder and a rotating speed feedback signal, so that the changes of the drill lifting speed and the pile-forming height are controlled, the drill lifting speed meets the requirement of constant pressure in a drill rod, and continuous stable pouring of piles is kept.

Description

technical field [0001] The invention belongs to the field of pile machinery, and in particular relates to a pile-forming quality control method for a long screw pile machine to keep the drilling speed synchronous with the pile-forming speed during the drilling-lifting process. Background technique [0002] With the continuous development of my country's urban construction and high-speed rail construction, the theory and technology of pile foundation construction have been developed. CFG pile (that is, cement fly ash gravel pile) composite foundation technology is due to its small settlement deformation, simple construction and low cost. In recent years, it has been widely used in foundation treatment and reinforcement of railways, highways, bridges, high-rise buildings, embankments and other subgrade projects. Pumping the mixed material into piles in long helical drilled pipes is the most commonly used pile construction method for CFG piles. This method is online pile formati...

AI Technical Summary

Problems solved by technology

This method solves the problem of coordinated control of the drilling speed tracking the pile-forming speed of concrete piles, maintains continuous and stable pile quality, and can significantly improve the automation of the drilling process of the long screw pile machine, improving the working conditions

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