Monitoring of the Bond State between the Concrete-Filled Steel Tube Pile and Surrounding Soil

The bonding state of the pile-soil interaction is complex. Traditional monitoring methods and tools have not been fully applied to monitor evaluate it although affects lifecycle safety pile. In this study, a health method proposed contact area; transient impact response based on piezoelectric ceramic sensors state. During test, different damage degrees were simulated by considering working conditions soil densities crack depths as examples. A horizontal stress was pile top, sensor embedded in detected wave. As wave differs conditions, an energy index established quantitatively degree damage.