Dynamic load testing

From Wikipedia, the free encyclopedia

Dynamic load testing is a fast and effective method of assessing foundation bearing capacity that requires instrumenting a deep foundation with accelerometers and strain transducers and analyzing data collected by these sensors.

The procedure is based on the Case Method of pile testing and is standardized by ASTM D4945-00 Standard Test Method for High Strain Dynamic Testing of Piles. It may be performed on driven piles, drilled shafts and other cast in place foundations. In addition to bearing capacity, Dynamic Load Testing gives information on resistance distribution (shaft resistance and end bearing) and evaluates the shape and integrity of the foundation element.

The foundation bearing capacity results obtained with dynamic load tests correlate well with the results of static load tests performed on the same foundation element.

  • Rausche, F., Moses, F., Goble, G. G., September, 1972. Soil Resistance Predictions From Pile Dynamics. Journal of the Soil Mechanics and Foundations Division, American Society of Civil Engineers. Reprinted in Current Practices and Future Trends in Deep Foundations, Geotechnical Special Publication No. 125, DiMaggio, J. A., and Hussein, M. H., Eds, August, 2004. American Society of Civil Engineers: Reston, VA; 418-440.
  • Scanlan, R.H., and Tomko, J.J., 1960, "Dynamic Prediction of Pile Static Bearing Capacity", Journal of the Soil Mechanics and Foundations Division, American Society of Civil Engineers, Vol. 86, No. SM4; 35-61
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