The present paper has made a detailed description of the theory and Prance of the frequency-initial velocity pile measurement method, and has suggeded some technical measures to tackle the problems that oxist in qualification and quality examindion of pile measuremnt.

Correction of the deviation of acoustic pipe-distance and the CBV Defect-Criterion in crosshole sonic logging of pile testing technique;

Based on the results of pile testing, some existing fo.

It introduces the basic principle and testing process of statnamic pile testing method.

Application of the coordinate inverse algorithm in the subgrade side pile measurement;

In order to improve the precision in pile foundation quality inspection,an evaluation was made on the uncertainty in the measurement for two pile foundation inspection methods-core drilling method and static loading test.

The application of new technique in pile foundation detection of road and bridge;

Discussion and improvement of the dynamic parameter method on pile foundation detection;

Combined with typical engineering geological situations in Shenzhen static load test method is selected for pile foundation detection.

With the implementation of dynamic testing of pile around the world,theory of stress wave has been applied in many fields in the quality detection of building foundation piles.

With the implementation of dynamic testing of pile around the world, theory of stress wave has been applied in many fields in the quality detection of building foundation piles.