ASTM D3689/D3689M-07 (R2013)e1 PDF Download

The ASTM D3689/D3689M-07 (R2013)e1 standard provides guidelines for testing the performance of deep foundations when subjected to static axial tension. This standard is applicable to various types of deep foundations, such as driven piles and cast-in-place piles, and it can be used for both single piles and pile groups.

The purpose of these test methods is to determine the axial deflection of a vertical or inclined deep foundation under static axial tensile load. Field tests are considered the most reliable way to establish the relationship between the applied load and the resulting movement. The test results can also provide valuable information about side shear resistance distribution along the pile shaft and long-term load-deflection behavior. Additionally, the results can be used by foundation designers to assess the ultimate static capacity and deflection at service load of the pile or pile group.

The standard allows for various test procedures, including quick tests, maintained tests, loading in excess of maintained tests, constant time interval tests, constant rate of uplift tests, and cyclic loading tests. The choice of test procedure may depend on the specific objectives of the test program, and the engineer in charge of the foundation design should approve any deviations from the standard requirements.

It is important to note that the quality and reliability of the test results depend on the competence of the personnel performing the tests, as well as the suitability of the equipment and facilities used. Compliance with ASTM Practice D3740, which provides criteria for competent and objective testing, does not guarantee reliable results. Therefore, the interpretation of the test results should be done by a qualified geotechnical engineer who can consider all relevant factors and predict the actual performance and adequacy of the deep foundation.