Analysis of the difficulties and essentials in low strain integrity testing on pile foundation in solution cavity area

Taking certain domestic highway with shallow rock stratum depth, developed Karst, short pile length of rock socketed pile and lower socketed depth as project instance, this paper further analyses on the typical pile foundation of above mentioned project, researches deeply about the effects to dynamic pile testing signal resulted by above mentioned features, and puts forward the pertinence measures on how to improve the accuracy of the judgment on solution cavity at bottom of pile through low strain integrity testing. This paper also presents specific suggestions on how to solve relevant problems from design and construction standpoints, and provides referential experience on quality control of pile foundation in highway project in developed solution cavity area.