The test is based on wave propagation theory. The TDR test requires minimal of preparation and is able to find defects corresponding to cracks, reductions in section and zones of poor quality concrete The test measures: Pile length, or depth to anomaliesPile head stiffnessPile shaft mobility – which is dependent on pile section and concrete propertiesThe software also produces computer simulations and impedance profiles of the test result, to analyse in detail any intermediate pile shaft responses. Pile integrity testing using low strain tests such as the TDR (Transient Dynamic Response) method, is a rapid way of assessing the continuity and integrity of concrete piled foundations. It is cost effective and not very time consuming. Short wave (ultrasonic) acoustic method Ī pile integrity test (also known as low strain dynamic test, sonic echo test, and low strain integrity test) is one of the methods for assessing the condition of piles or shafts.Nuclear radiation, or gamma-gamma method.Indirect methods, or imaging, were first developed in the early 1970s. Sonic Integrity Testing is a widely used method for testing the quality of concrete piles in a non-destructive way before they. SIT-series Sonic Integrity Testing (SIT) of concrete piles Pile quality is often determined by performing a low strain integrity test directly after pile driving or within days after installation of cast-in-situ piles. 1, 86529 Schrobenhausen, Germany, Phone +49825297-0, e-mail: Abstract In recent years, the application of non-destructive testing in the field of special geotechnical works has grown. Ultrasonic Integrity Testing for Bored Piles - A Challenge Karsten BECKHAUS1, Harald HEINZELMANN1 1 BAUER Spezialtiefbau GmbH, BAUER-Str. Core drilling, on the other hand, can be carried out to a large depth provides full information, but only for a very small fraction of the pile volume. While excavation may be effective in exposing flaws in the outer part of the pile, it is usually limited to a depth of a few meters. These included external methods such as excavation around the pile and internal or intrusive methods, such as core-drilling. Historically, pile integrity was investigated by direct methods. The purpose of integrity testing is to discover such flaws before they can cause any damage. In fact, experience has shown that in piles, of all kinds flaws may occur. their compliance with project drawings and specifications. Since pile construction as well as the final product are mostly invisible, engineers have often questioned their integrity, i.e. A pile is a slender element cast in the ground or driven into it.
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