Experimental test device based on true crack state and test method thereof

Abstract

The invention discloses an experimental test device based on a true crack state and a test method thereof and belongs to the concrete non-destructive test and repair reinforcement technology field. The device mainly comprises a concrete block, a position adjustment component, a fixing component, a crack test component, an intelligent control component, and a power supply device. By fixing a component structure, a crack shooting camera can be taken in when the camera is not used so as to avoid a condition that scratches of a lens caused by an external environment can affect a shooting effect. Through the crack test component and the intelligent control component, an energy reduction amplitude of an ultrasonic signal in a crack test process is obtained so as to calculate a crack depth, safety of a tested structure is evaluated according to the crack depth, remedial measures are obtained, and work reliability of a device is improved. The crack test device of the invention can convenientlycarry out remote crack testing through the intelligent control component, and a test data change value is timely transmitted to an external controller so that monitoring personnel can timely grasp arelevant situation of a crack and timely processing becomes convenient.

Description

technical field [0001] The invention belongs to the technical field of non-destructive detection and repairing and strengthening of concrete, and in particular relates to a test device and a test method based on the real state of cracks. Background technique [0002] Concrete structures are the most important civil, hydraulic and architectural structures and play a pivotal role in social infrastructure. However, due to various reasons (such as drying shrinkage, temperature stress, external load, foundation deformation, etc.), concrete produces cracks, and cracks are the most common defect or damage phenomenon in concrete structures. Due to the different causes, states, development and positions in the structure of cracks, the harmfulness to the structure is also very different. Severe cracks may endanger the integrity and stability of the structure, and have a great impact on the safe operation of the structure. On the other hand, there are also some cracks, such as shallo...

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Problems solved by technology

[0003] At present, the commonly used crack depth detection methods in engineering inspection are destructive method and non-destructive method. The destructive method refers to the intuitive and effective method of drilling and coring. Cracks are often difficult to test due to sampling difficulties

Non-destructive methods include ultrasonic method (including flat measurement method, oblique measurement method and countermeasure method), surface wave method (phase inversion method, propagation time difference method), but due to the influence of crack surface contact, steel bars, moisture and signal attenuation , the wave will pass through in advance, and the propagation time of the test will be shortened, so that the fracture depth obtained by the standard test method is often shallower than the actual value, especially for deep fractures, the test error is greater

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