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A method and detector for detecting grouting fullness of steel bar sleeves in fabricated concrete structures

A concrete structure and steel sleeve technology, applied in the field of construction quality inspection, can solve problems such as inability to carry out effective inspection, and achieve the effect of fast testing speed, high efficiency, and efficient testing equipment

Active Publication Date: 2017-07-21
BEIJING ZBL SCI & TECH
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Problems solved by technology

However, the steel sleeve connection structure is an alternating multi-layer medium, such as figure 1 As shown, it includes the first component 2, the first steel bar 3, the sleeve 4, the second steel bar 5, the second component 6, the grout hole 7 and the grout hole 8, wherein the metal and non-metal media alternate, and the mortar body is radially The thickness is very thin, generally 5mm or 6mm, which makes the existing engineering non-destructive testing methods unable to effectively detect it

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  • A method and detector for detecting grouting fullness of steel bar sleeves in fabricated concrete structures
  • A method and detector for detecting grouting fullness of steel bar sleeves in fabricated concrete structures
  • A method and detector for detecting grouting fullness of steel bar sleeves in fabricated concrete structures

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Embodiment Construction

[0032] The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] Equations available for any mechanical vibration: to represent, where x is the amplitude, A 0 is the initial amplitude, t is the time, ω is the natural angular frequency of the vibration system, and β is the damping coefficient. The amplitude of the vibration decays exponentially. When the vibration body is constant and the amplitude and frequency of the initial vibration after excitation are constant, the greater the elastic modulus of the medium around the vibration body, the greater the damping coefficient. Therefore, the medium around the vibration body is air, The damping coefficients of water, flowing mortar, and solidified mortar increase sequentially, and the corresponding amplitude attenuation will increase sharply. To this end, design a vibration sensor and a corresponding detector that can generate vibration th...

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Abstract

The invention relates to the technical field of reinforced concrete quality detection, in particular to a method and a detector for detecting the grouting fullness of a steel bar sleeve of an assembled concrete structure. A method and detector for detecting the fullness of steel bar sleeve grouting in assembled concrete structures provided by the present invention, through the MCU control unit for signal transmission with the human-computer interaction unit, the MCU control unit is respectively connected with the signal receiving and processing device, the signal The excitation device is connected to the power supply, the signal excitation device is connected to the wire of the damping vibration sensor, the damping vibration sensor generates a damping vibration wave after receiving the excitation signal, and the damping vibration sensor transmits the damping vibration wave to the MCU control unit. The detector and detection method provided by the present invention can distinguish the damping vibration attenuation law of the sensor, the relationship between the height of the concrete grouting material and the change of the sensor, and accurately judge whether the grouting material is filled or whether the fullness of the grouting after solidification is qualified during the construction process .

Description

technical field [0001] The invention relates to the technical field of building quality detection, in particular to a method and a detector for detecting the grouting fullness of a steel bar sleeve of an assembled concrete structure. Background technique [0002] Prefabricated concrete structure refers to a concrete structure assembled by prefabricated concrete components through reliable connection. Because of its advantages of energy saving, environmental protection, saving formwork, improving construction conditions, increasing labor productivity, and speeding up construction progress, it is currently widely used in housing construction projects in China's first- and second-tier cities. In prefabricated concrete structures, steel sleeve grouting connection is a commonly used connection method. Whether the sleeve grouting is full or not will directly affect the shear bearing capacity and seismic capacity of the structure. In ", the required standards for component connect...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/38G01N19/00
Inventor 管钧张全旭杨帡
Owner BEIJING ZBL SCI & TECH
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