Device and method for monitoring pile foundation center deviation in percussion drill bored pile construction

Abstract

The invention relates to a device for monitoring pile foundation center deviation in percussion drill bored pile construction. The device comprises four guard piles and a positioning circular ring, wherein the four guard piles are distributed in the front, back, left and right directions of a bored pile, and the distances between the four guard piles and the center of the bored pile are the same.The positioning circular ring is located in the centers of the bored pile, one positioning ring in the front, back, left and right directions is connected with the guard piles in the corresponding directions through pull ropes, and the pull ropes are tensioned to fix the positioning annular ring in a suspended mode. According to the method, the guard piles in four directions and winding wheels areused for tensioning hoops with the specific diameter, and whether the deviation of the center position of a pile hole is within the range allowed by the specification or not is determined by observing the relative position relation between the steel wire lifting rope for hanging the drill bit and the hoops. The problems that in the punching process of a percussion drill, a traditional method fordetecting the position deviation of a pile hole needs to measure by a measuring tape, the drilling process needs to be interrupted, and the deviation of each time of punching cannot be found and corrected in time, are solved.

Description

technical field [0001] The invention belongs to the technical field of cast-in-situ pile construction, and in particular relates to a device and method for monitoring the center deviation of pile foundation during the construction of percussion-drilled cast-in-situ piles. Background technique [0002] In the construction of bored piles using percussion drills, the deviation of the center position of the pile hole is one of the key criteria for evaluating the quality of bored piles. The "Technical Specifications for Highway Bridge and Culvert Construction" stipulates that for single-row piles, the allowable deviation of the hole center position is 50mm, and for group piles, the allowable deviation is 100mm, and the axis deviation of the pier column is controlled within 10mm or 15mm. Strictly controlling the deviation of the center position of the pile hole is the key to determining the quality of the pile foundation and its upper structure. The traditional control method is ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a device and method for monitoring the center deviation of pile foundation during the construction of percussion drilling bored piles, which is used to solve the problem that the traditional method of detecting the position deviation of the pile hole needs to measure the position of the pile hole during the process of percussion drilling and punching. Problems requiring measurement and interruption of the drilling process

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