Method and device for detecting high-grade mountain sand concrete for inner steel pipe column

Abstract

The invention discloses a method and a device for detecting high-grade mountain sand concrete for an inner steel pipe column. The device comprises three sounding pipes vertically arranged in the steelpipe column; the three sounding pipes are respectively positioned at the three included angles of an equilateral triangle, the lower end of each sounding pipe is at the bottom of the steel pipe column, the upper end of each sounding pipe is higher than the steel pipe column, and two transducers are arranged in the two of the sounding pipes; the two transducers are respectively connected with twoinput ports of a foundation pile cross-hole ultrasonic automatic measuring instrument by means of two data lines, and a data output port of the foundation pile cross-hole ultrasonic automatic measuring instrument is connected with an input port of a non-metal ultrasonic detecting analyzer. A knocking analysis method and an acoustic wave cross-section analysis method are adopted to perform 100% non-destructive test on the high-grade mountain sand concrete of the inner steel pipe column, a long rod core sampling analysis method is used for the re-testing the suspected areas so as to accurately determine the suspected positions, and the long rod core sampling analysis method is used for re-inspection of the suspected positions; drilled holes are repaired after the re-inspection is finished, so that the structural damage is reduced.

Description

technical field [0001] The invention relates to a detection method and device for high-grade mountain sand concrete used in steel pipe inner columns, and belongs to the technical field of inspection and testing in construction engineering. Background technique [0002] Concrete filled steel tube has the advantages of high bearing capacity, good plasticity, good toughness, convenient fabrication and construction, and good fire resistance, so it is widely used in super high-rise building systems. During construction, due to the closed space of concrete filled steel pipe concrete, it is difficult to guarantee the quality of concrete pouring, and C60-C70 high-grade mountain sand concrete is widely used for filling in the southwest region. High-grade mountain sand concrete has a large shrinkage volume and is easy to The characteristics of shrinkage cracks are formed, so it is extremely important for the forming quality control and detection of hill sand concrete in steel pipes. ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a detection method and device for high-grade mountain sand concrete in steel pipe inner columns with convenient operation, low cost and reliable detection results, which solves the difficulty in detecting the quality of concrete pouring and defects in steel pipe concrete due to the airtight condition of steel pipe concrete. Technical difficulties in areas that are difficult to locate and reduce the proportion of destructive tests

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