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Measurement method for separation quantity of steel tube concrete

A technology for steel pipe concrete volume measurement, which is applied to measuring devices, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, and using sound waves/ultrasonic waves/infrasonic waves for material analysis, etc., which can solve the problems of high difficulty and low precision in void volume measurement

Inactive Publication Date: 2018-06-29
CHINA SHENHUA ENERGY CO LTD +3
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for measuring void volume of steel pipe concrete to solve the problems of high difficulty and low precision in void volume measurement

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  • Measurement method for separation quantity of steel tube concrete

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Embodiment Construction

[0026] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and not to limit the present invention.

[0027] The present invention provides a method for measuring the void amount of steel tube concrete, wherein the steel tube concrete includes a steel tube 1 and concrete 2 filled in the steel tube 1, wherein the method for measuring the void amount of the steel tube concrete includes:

[0028] Step 1: Set acceleration sensors 3 on the dense position and vacant position on the outer peripheral wall of the steel pipe 1 respectively;

[0029] Step 2: Knock the steel pipe 1 near each of the acceleration sensors 3 to generate oscillating stress waves that reciprocate in the diameter direction in the steel pipe concrete, and measure the compactness by the corresponding acceleration s...

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Abstract

The invention relates to the field of quality test of steel tube concrete and discloses a measurement method for the separation quantity of the steel tube concrete. The measurement method comprises the following steps: step one, respectively arranging acceleration transducers (3) on the dense position and the separation position on the peripheral wall of a steel tube (1); step two, knocking the steel tube (1) and measuring vibration frequency F of the dense position and the vibration frequency f of the separation position; step three, obtaining the separation quantity h being equal to ((1 / f-1 / F) / 2)*(1 / (1 / v0-1 / V1)), wherein v1 is the propagation velocity of stress wave in concrete (2), and v0 is the propagation velocity of the stress wave in the air. According to the technical scheme, the acceleration transducer is arranged on the peripheral wall of the steel tube and the outer surface of the steel tube is knocked; the separation quantity of the concrete inside the steel tube can be measured, and the damage to the structure of the steel tube concrete is avoided; the measurement method is suitable for the quality test and has the advantages of simple operation and relatively-high operation efficiency.

Description

Technical field [0001] The invention relates to the quality inspection of steel tube concrete, in particular to a method for measuring the void amount of steel tube concrete. Background technique [0002] Concrete-filled steel tube is a steel tube filled with concrete. It can be used as a structural component of a pressure pipe column in high-rise construction projects, and together with steel beams and beam-column nodes, it forms the frame structure of the building. [0003] The concrete inevitably forms a gap between the concrete and the steel pipe after solidification. The size of the gap affects the overall quality. Therefore, it is necessary to test the gap size of the finished steel tube concrete, that is, the void volume to select the steel tube with void volume that meets the standard. Concrete. [0004] In the prior art, there are many methods for detecting the quality of steel tube concrete, but most of them are methods of analysis by engineers and technicians based on exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B17/00G01N29/04G01N29/12
CPCG01B17/00G01N29/043G01N29/045G01N29/12G01N2291/0232G01N2291/0234G01N2291/02458G01N2291/0289
Inventor 刘建磊孟宪洪闫斌李保龙王敬唐永康
Owner CHINA SHENHUA ENERGY CO LTD
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