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Acoustic testing techniques in recent years, the development of a new technology very quickly , it is an elastic wave test method , the theory based on the propagation of elastic waves in solid media Theoretically , the method is based on artificial excitation of the way receiving the the medium physical characteristics of the modulation of the acoustic wave emitted sound waves to the medium (rock , rock , concrete structures ) , in a certain spatial distance , through observation and analysis of acoustic wave propagation velocity in different media , acoustic parameters such as amplitude , frequency , solve a series of geotechnical engineering problems . This article first introduces the development status of acoustic testing techniques , and acoustic test principle is discussed , then the acoustic testing techniques used in the railway industry engineering quality testing focuses from acoustic detection crack depth , the sonic testing concrete strength and the acoustic transmission method three aspects of the the pile integrity quantitative analysis research are discussed , and achieved certain results : 1 . cracks appear for special parts , the implementation of the new testing program , and derive a new depth formula , tested resulting crack depth and crack depth match ; rebound synthetic method of using ultrasonic testing concrete strength , to do comparative experiments , the actual strength with concrete strength test calculations are basically the same ; 3 . formulated ultrasonic transmission method detection pile integrity quantitative criteria. At present , the domestic rail industry pile nondestructive testing based primarily on standards for \Practice testing , human factors , and difficult to operate . Objectively and accurately evaluate the quality of the project , an urgent need to make a quantitative index of the pile integrity Classification Standard . I participated in this quantitative indicators to develop , modify and improve the work , and on April 18 by the second test of the Wanzhou Railway workshop quantization standard across the board to promote the implementation of the Wanzhou Railway . The contrast experiments show that after the the sonic test results with the traditional detection method , ultrasonic testing technology is regarded as a highly efficient, accurate, non-destructive testing methods of the economy . Ultrasonic testing technology to the field of non-destructive testing in the railway industry will play an important role .
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