Non-linear ultrasonic detection device for hole channel grouting quality and test method

Abstract

The invention relates to the technical field of ultrasonic detection, in particular to a nonlinear ultrasonic detection device and test method.The nonlinear ultrasonic detection device for the hole channel grouting quality comprises a signal generator, an amplifier, an oscilloscope, a transmitting transducer and a receiving transducer, and the signal amplifier amplifies ultrasonic signals of the signal generator; an ultrasonic digital signal is formed, the transmitting transducer converts the ultrasonic digital signal into an ultrasonic vibration signal and transmits the ultrasonic vibration signal to the test piece, and the receiving transducer converts the ultrasonic vibration signal penetrating through the test piece into a digital signal and transmits the digital signal to the oscilloscope; by designing the test piece and simulating the damage condition of duct grouting, the damage condition of duct grouting can be effectively detected by using a nonlinear ultrasonic method, a high-precision detection effect can be achieved, and compared with other duct grouting detection methods, the method is more sensitive to damage and has smaller influence on a detected object.

Description

technical field [0001] The invention relates to the technical field of ultrasonic detection, in particular to a non-linear ultrasonic detection device and test method for tunnel grouting quality. Background technique [0002] Prestressed concrete structures are widely used in civil engineering and hydraulic engineering, among which prestressed tension control and sealed grouting are the key steps of prestressed post-tensioning method. The parameter used in the sealing grouting process is compactness, which is one of the key parameters to evaluate the grouting quality of prestressed concrete structures. When the grouting in the channel is not dense enough, there are pores in the grouting channel after the grouting is completed, and the water molecules in the air, carbon dioxide, etc. go deep into the pores and react with the steel strands that are loaded, causing corrosion and other reactions, resulting in a decrease in the prestress of the entire structure, and the steel str...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a non-linear ultrasonic detection device and test method for tunnel grouting quality, aiming at solving the problem that the tunnel grouting detection in the prior art belongs to destructive detection according to the traditional method. Cause damage and cause great inconvenience in engineering practical application

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