The structural defect type of pipeline is the reference value for making comprehensive definition of local defect or whole defect in evaluation of the pipeline.
The parameter for pipeline damage condition is the calculation result of defect score, S is arithmetic mean value of the scores of each defect of pipeline, and Smax is the highest score among the scores of each defect of pipeline.
Ultrasonic is a kind of elastic wave. The concrete medium is regarded as an elastic body. The propagation of ultrasonic waves in concrete obeys the law of elastic wave propagation.
As the basic device for defect testing of cast-in-place concrete piles, the ultrasonic pile integrity tester can generate repetitive electric pulses and excite the transmitting transducer.
Static load test equipment is mainly composed of loading reaction force system, load measurement system, displacement measurement system and automatic acquisition system.
Ultrasonic transmission method is used as a method to detect the quality of foundation piles, which can accurately find the defect position and defect range of foundation piles.
Determining whether the bearing capacity of a single pile meets the design requirements is one of the main functions of the high-strain dynamic pile test method.
Pile dynamic testing is a complex theoretical and practical system, which involves many disciplines, and requires careful operation in actual engineering to ensure the accuracy of various data, otherwise it will produce unpredictable consequences.
PIT testing of foundation piles has the advantages of simple operation, economy, strong timeliness, and high accuracy, which has been widely used in foundation pile integrity detection.
