ASTM D5780-18 PDF Download

The ASTM D5780-18 standard provides methods for testing the axial deflection of deep foundations, known as piles, when loaded in static axial compression. These methods are applicable to all types of deep foundations, regardless of their method of installation, and can be used for testing single piles or pile groups. It is important to note that the test results may not fully represent the long-term performance of the deep foundation.

The standard establishes minimum requirements for testing deep foundations under static axial compressive load. Additional requirements and procedures may be included in plans, specifications, or provisions prepared by a qualified engineer to meet the specific objectives of a test program. Any deviations from the standard's requirements must be approved by the engineer in charge of the foundation design.

The standard allows for various test procedures, including quick tests, maintained tests (optional), loading in excess of maintained tests (optional), constant time interval tests (optional), constant rate of penetration tests (optional), constant movement increment tests (optional), and cyclic loading tests (optional). These optional procedures may produce different test results and should only be used with the approval of the engineer.

The test results obtained from the procedures outlined in the standard should be interpreted by a qualified geotechnical engineer to predict the actual performance and adequacy of the piles in the constructed foundation. The standard also provides guidelines for significant digits and rounding of observed and calculated values.