Detection method of length of cast-in-place pile reinforcement cage based on electromagnetic field intensity testing

Abstract

The invention discloses a detection method of length of a cast-in-place pile reinforcement cage based on electromagnetic field intensity testing. The detection method comprises the steps of 1) drilling a hole parallel to a cast-in-place pile beside the formed cast-in-place pile; 2) lowering a movable electrode of an integrated magnetic induction sensor to the hole parallel to the cast-in-place pile beside the formed cast-in-place pile at a constant speed through a cable of a cable collection disc; and 3) connecting the integrated magnetic induction sensor with an inverter power source and a computer, determining the magnetic induction intensity of the position through a test probe, and after data processing of the computer, judging the length of the reinforcement cage through the change of the magnetic induction intensity. According to the detection method, the hole parallel to the cast-in-place pile is drilled beside the formed cast-in-place pile, the test probe equipped with the movable electrode is utilized to apply high-voltage high-frequency alternating current generated by an inverter between the hole and the reinforcement cage, the test probe determines the magnetic induction intensity of the position, and the length of the reinforcement cage is judged through the change of the magnetic induction intensity.

Description

technical field [0001] The invention relates to the field of detection methods for the length of a cast-in-place pile reinforcement cage, in particular to a detection method for the length of a reinforcement cage for a cast-in-place pile based on electromagnetic field strength testing. Background technique [0002] Cast-in-situ piles have the advantages of high bearing capacity and relatively simple construction technology, and are widely used as the foundation of industrial and civil buildings such as bridges, viaducts, living and production houses, etc. Because the cast-in-place pile is an underground concealed project, its quality determines the quality of the project. Therefore, it is necessary to test the length of the steel cage of the cast-in-place pile. At present, the detection methods for the length of the steel cage can be divided into electromagnetic wave method, electrical method, and magnetic method. , Transient electromagnetic induction method four categories....

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Problems solved by technology

The papers on measuring the length of steel cages by using transient electromagnetic induction method have not appeared in authoritative publications, so it is not suitable to popularize the use of transient electromagnetic induction logging method to detect the length of steel cages at present in China

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