Dynamic load testing: Difference between revisions

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{{Short description|Method to assess a pile's bearing capacity}}

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

{{about|a geotechnical pile testing method|software engineering dynamic testing|Dynamic testing}}

'''Dynamic load testing''' (or '''dynamic loading''') is a method to assess a [[Deep foundation|pile]]'s [[bearing capacity]] by applying a dynamic load to the pile head (a falling mass) while recording acceleration and strain on the pile head. Dynamic load testing is a ''[[high strain dynamic testing|high strain dynamic test]]'' which can be applied ''after ''pile installation for concrete piles. For steel or timber piles, dynamic load testing can be done during installation or after installation.

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 [[pile|drivenall piles]], regardless drilled shafts and other castof intheir placeinstallation foundationsmethod. 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 testing|static load tests]] performed on the same foundation element.{{Citation needed|date=July 2013}}

==ReferencesSee also==

* [[Pile integrity test]]

* 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.

==References==

* 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; 418-440418–440.

* Rausche, F., Goble, G.G. and Likins, G.E., Jr. (1985). [https://dx.doi.org/10.1061/(ASCE)0733-9410(1985)111:3(367) Dynamic Determination of Pile Capacity]. ''Journal of the Geotechnical Engineering Division'', 111(3), 367–383.

* Salgado, R. (2008). ''The Engineering of Foundations.'' New York:McGraw-Hill, Chapter 14 (pp. 669-713).

* 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

==External links==

*[http://www.foundationengineering.info/Photo_Galleriesphoto_galleries/14/PDApda Instrumentation and Pictures of Dynamic Load Test of Piles]

{{Geotechnical engineering}}

[[Category:In situ foundation tests]]

[[Category:Deep foundations]]

[[Category:Geotechnical {{Civil-engineering]]-stub}}