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Method for detecting grouting saturation of inner sleeve of fabricated building wall and application thereof

A technology for grouting building walls and sleeves, which is used in measuring devices, material analysis using radiation diffraction, material analysis using wave/particle radiation, etc., can solve problems such as poor saturation methods, and achieve good applicability, Reliable effect

Active Publication Date: 2021-03-16
ANHUI URBAN CONSTR DESIGN & RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method for detecting the saturation of sleeve grouting in the prefabricated building wall and its application, so as to solve the problem of detecting grouting in the sleeve in the prefabricated wall in the prior art. Saturation method poor technical issues

Method used

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  • Method for detecting grouting saturation of inner sleeve of fabricated building wall and application thereof
  • Method for detecting grouting saturation of inner sleeve of fabricated building wall and application thereof
  • Method for detecting grouting saturation of inner sleeve of fabricated building wall and application thereof

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Embodiment

[0071] 1) Use the present invention for such as figure 1 The quality of the connection between the base plate and the wall shown is checked.

[0072] 2) The wall thickness d is 200mm. Use the neutron scattering imaging detector to calibrate and sample various parts of the wall sample plate with a thickness of 200mm, including the area A1 without any structure inside, and the area A2 containing standard sleeves and steel bars but no slurry inside, including standard sleeves Area A3 for cylinders, reinforcement and grout. Form a calibration image P A1 ( figure 2 ), P A2 ( image 3 ), P A3 ( Figure 4 ).

[0073] 3) As an implementation case, select figure 1 One of the connecting sleeves defines the detection area and divides the area 1 into an equally divided grid of N columns and M rows. Using a dedicated automated neutron scattering scanning imaging equipment, according to the equal grid step, the area is continuously automatically scanned to form {p NM}.

[0074]...

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Abstract

The invention discloses a method for detecting grouting saturation of an inner sleeve of a prefabricated building wall and application of the method, and relates to the technical field of nondestructive testing. The method comprises the following steps of: firstly, acquiring a standard value of thermal neutron scattering data of a standard sample, then delimiting a detection area, and continuouslyacquiring thermal neutron scattering density data in the area; and forming an image P' of the detection area by the acquired data through a specific algorithm. According to the invention, fast neutrons emitted by a neutron source collide with atomic nucleuses of sensitive elements such as hydrogen and boron in substances, energy of the neutrons is gradually lost, the neutrons are slowed down intothermal neutrons, and the thermal neutrons are scattered all around. When the distribution density of the neutron image detected at a certain part is obviously lower than the neutron density under the same condition, the unsaturated problem of the area can be judged, the unsaturation degree is given, and compared with an ultrasonic method and an impact echo method, an internal image can be obtained, quantitative judgment can be realized, and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a method for non-destructive testing by neutron scattering. Background technique [0002] The quality of structural connections such as prefabricated concrete walls, such as the extensive use of sleeve joints and grouting saturation of anchor joints, directly affects the safety of the structure. At present, there is a lack of effective detection methods for the quality of the joints of prefabricated concrete structures. In recent years, more and more attention has been paid to the detection method of the grouting fullness of the sleeve connection joint of the prefabricated concrete structure. Various methods and patents emerge in endlessly, but there is still no reliable and effective detection method. [0003] The mainstream detection methods currently available in the literature include: ultrasonic flaw detection method, electromagnetic wave method (radar metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20
CPCG01N23/20G01N2223/05G01N2223/1066G01N2223/401
Inventor 廖旭涛吴东彪孟玉曹光暄徐文华万富李天宝夏日东
Owner ANHUI URBAN CONSTR DESIGN & RES INST
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