Get access

Study on low-strain integrity testing of pipe-pile using the elastodynamic finite integration technique

Authors

  • Zhi Tang Lu,

    1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education (Dept. Geotech. Eng.), Tongji University, Shanghai, China
    2. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, China
    Search for more papers by this author
  • Zhi Liang Wang,

    Corresponding author
    • Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education (Dept. Geotech. Eng.), Tongji University, Shanghai, China
    Search for more papers by this author
  • Dong Jia Liu

    1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, China
    Search for more papers by this author

Zhi Liang Wang, Key Laboratory of Geotechnical & Underground Engineering of Ministry of Education (Dept. Geotech. Eng.), Tongji University, Shanghai 200092, China.

E-mail: cvewzL@tongji.edu.cn

SUMMARY

This study focuses on the three-dimensional (3-D) characteristics of wave propagation in pipe-pile using elastodynamic finite integration technique. First, a real 3-D pile-soil model in cylindrical coordinate system is presented. Then, the governing equations are established. With the boundary and initial conditions, the numerical solution is obtained. The accuracy and feasibility of the self-written code are further verified via comparing with the measured data. Velocity histories at different angles of pile top and pile tip are illustrated, and the snapshots reflecting the 3-D characteristics of wave propagation are given. It shows that the interferences of Rayleigh waves can confuse the result interpretation for pile integrity testing. The increase of hammer contact time can effectively mitigate the interferences, and the interferences of Rayleigh waves are weakest at an angle of 90° from where hammer hits. Besides, surrounding soil can partly mitigate the wave interferences. Copyright © 2012 John Wiley & Sons, Ltd.

Ancillary