Device for inspecting repairing effect of concrete crack, and method thereof

An inspection device, concrete technology, applied in electromagnetic measurement device, electric/magnetic depth measurement, material magnetic variable, etc., can solve the problems of uneven stiffness, lack of crack repair depth, irregular crack shape, etc.

Active Publication Date: 2018-08-24
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] Of course, some technicians also proposed the idea of ​​using ultrasonic waves to measure the actual repaired depth of cracks, but there are many problems that lead to inaccurate ultrasonic measurement results
First of all, the stiffness of the concrete composition material is not uniform, and there are often many voids in the honeycomb structure, which has various adverse effects on the transmission of ultrasonic waves; secondly, the cracks are irregular in shape, with many bends and closures, which will directly lead to errors in measurement results; in addition , Ultrasonic testing is easily affected by the reinforcement inside the concrete, and the layout of the probe will also directly affect the accuracy of the measurement results and the applicability of the method
In summary, there is still a lack of effective means to know the actual repair depth of cracks

Method used

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  • Device for inspecting repairing effect of concrete crack, and method thereof
  • Device for inspecting repairing effect of concrete crack, and method thereof
  • Device for inspecting repairing effect of concrete crack, and method thereof

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, the test device for the repairing effect of concrete cracks of the present invention includes a support 2 fixed on the surface of the concrete structure 1, a measuring hole 4 drilled inside the concrete structure 1 and located near the crack 3, and is used to extend into the measuring hole Depth rod 5 and master controller within 4.

[0030] The vicinity of the crack 3 means that the measuring hole 4 and the crack 3 are kept within a certain distance, such as within 2-3 cm, so that the magnetic probe 7 can sense the magnetic field of the magnetic grouting material at the crack 3 .

[0031] The support 2 is provided with a via hole 6 communicating with the measurement hole 4, and the depth rod 5 is inserted into the measurement hole 4 through the hole 6. The head of the dep...

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Abstract

The invention discloses a device for inspecting the repairing effect of a concrete crack, and a method thereof. The device comprises a bearer, a measuring hole, a depth rod and a main controller, thedepth rod goes through the through hole of the bearer and is inserted into the measuring hole, the depth rod is provided with a magnetic probe, the inspection device further includes a depth measurer,and the magnetic probe and the depth measurer are all in data connection with the main controller. The method is characterized in that a magnetic grouting material is prepared and is used to repair the crack, an external magnetic field is applied, a relational graph between the magnetic induction intensity and the depth is fitted, and an inflection point is obtained. The device and method can beused to accurately measure the actual repairing depth of cracks in a concrete structure.

Description

technical field [0001] The invention relates to the field of repairing reinforced concrete structures, in particular to a device and method for testing the repairing effect of concrete cracks. Background technique [0002] Concrete is currently one of the most widely used building materials due to its advantages of convenient construction, compression and fire resistance, practicality and flexibility. However, during the service process of concrete materials, structural and non-structural cracks will occur due to various internal and external factors such as plastic shrinkage, drying shrinkage, structural deformation, and external loads. After the above-mentioned cracks are generated and expanded to a certain extent, if they are not repaired in time, the safety, durability and normal use of the structure will be endangered. If they are allowed to expand and penetrate, it will even lead to catastrophic accidents. At present, cement mortar or epoxy resin is generally used as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/84G01B7/26
CPCG01B7/26G01N27/84
Inventor 张军毛江鸿樊玮洁金伟良
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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