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

With practical examples,crosshole sonic logging is employed in this paper to inspect the integrity of the cast-in-place pile(model pile) and to determine the degree of defectiveness.

Application of sound wave transmission method to integrality measurement of foundation pile grouting;

Study of slope measurement and sound wave transmission method;

Integrated application of the sound wave transmission method and low strain reflection wave method in pile detection;

The acoustic transmission method is convenient for use.

The authors introduce the disposing project,detecting mains of acoustic transmission method and detecting results of certain bridge piles in this paper,and discusse physical characters of defects and basic features of detecting curves befor disposing and .

Decision standard for grade of pile integrity by cross-hole sonic logging;

The pipe lean will bring negative effects to evaluate the quality of piles in cross-hole sonic logging.

Detecting the bored concrete pile with the ultrasonic wave method;

Ultrasonic Transmission Method to Check the Pile;

Application of ultrasonic transmission method to detecting integrity of large-diameter bored cast-in-place piles;

This paper introduces the basic principles of detecting the quality of concrete filling pile by using ultrasonic transmission method and the main steps and notes of the field detection, and probes into the methods for judging the defects of filling pile and the methods for determining the pile integrity categories.