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Method and detector for detecting grouting fullness of reinforcement sleeve of prefabricated concrete structure

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 precision, and efficient testing equipment

Active Publication Date: 2016-01-06
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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  • Method and detector for detecting grouting fullness of reinforcement sleeve of prefabricated concrete structure
  • Method and detector for detecting grouting fullness of reinforcement sleeve of prefabricated concrete structure
  • Method and detector for detecting grouting fullness of reinforcement sleeve of prefabricated concrete structure

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[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 quality detection of reinforced concrete, particularly to a method and a detector for detecting the grouting fullness of a reinforcement sleeve of a prefabricated concrete structure. According to the method and the detector for detecting the grouting fullness of the reinforcement sleeve of the prefabricated concrete structure, an MCU (microprogrammed control unit) transmits signals to a human-computer interaction unit and is connected with a signal receiving and processing device, a signal excitation device and a power supply respectively, the signal excitation device is connected with a lead of a damping vibration sensor, and the damping vibration sensor generates damping vibration waves after receiving excitation signals and transmits the damping vibration waves to the MCU. With the adoption of the detector and the detecting method, the damping vibration attenuation law of the sensor as well as the change relationship of the height of a concrete grouting material and the sensor can be distinguished, and whether the grouting material is full or not or whether the grouting fullness is qualified or not after solidification is accurately judged in a 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 directly affects the shear bearing capacity and seismic capacity of the structure. In "JGJ1-2014 Technical Specification for Prefabricated...

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Application Information

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