As a continuing service to our clients, Atlas Tube routinely enlists the services of industry leaders in matters related to driven pipe piles. This is the fourth in a series of topics provided at our request by Wagner Komurka Geotechnical Group, Inc.
Dynamic testing of driven piles is a valuable, cost-effective tool for the design and construction control of foundation projects which utilize driven piling. Testing is performed during the pile driving process, and consists of attaching strain gages and accelerometers to a pile near its head. The instrumentation system continuously records measured strains and accelerations in a pile, which are induced downward in the pile by high-strain impacts from each hammer blow, and are reflected upward in the pile by soil or rock resistance, or changes in pile impedance (changes in cross-section, or from the pile toe). The data collected by dynamic testing can be viewed in real time during driving, and for each hammer blow can provide such information as: