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High Strain Dynamic Load Tests, also called PDA tests, assess the capacity of several piles in a single day. Pile Driving Analyzer systems also evaluate shaft integrity, driving stresses, and hammer energy when monitoring installation.
Several considerations go into obtaining a good test. 2 DATA REQUIRED. Dynamic pile testing should follow ASTM D4945 guidelines to obtain the dynamic force and velocity on the pile, often two diameters below the pile top. Usually measurements are made with reusable strain and acceleration sensors.
DATA INPUT CHECKING. Prior to the field test, more commonly known as PDA, the following should be checked: Wavespeed. For RC Driven Pile, typical wavespeed ~ 3800 – 4200 m/s, depending on concrete grade. For Spun Pile, typical wavespeed ~ 4400 m/s. For Steel Pile, typical wavespeed ~ 5120 m/s. Area.
Codes, Specifications and Guidelines pertinent to Dynamic Load Testing and Wave Equation Analysis. ISO 22476-3:2005 - Geotechnical investigation and testing -- Field testing -- Part 3: Standard penetration test. See examples of the Technical Specifications for our services provided by the GRL Engineers team.
With the PDA, it is possible to test five to ten percent of all piles on a site, and do it easily and economically. PDA testing makes it possible to solve problems encountered during pile driving based on facts rather than assumptions. Construction quality is improved through increased testing.
A. Dynamic testing involves attaching at least two strain transducers and two accelerometers to the pile near the pile head during initial driving or at a convenient location during re-strike testing. A cable or wireless transmitter connects the sensors near the pile head with the Pile Driving Analyzer® (PDA) system (available
24 mar 2016 · Dynamic Load Testing or PDA testing, is a fast, reliable and cost effective method of evaluating foundation bearing capacity. SSG can perform Dynamic Load Testing on driven piles, drilled shafts, auger-cast piles, micropiles, helical piles, and other cast in place foundations.
