ASTM D1143/D1143M-20 PDF Download

ASTM D1143/D1143M-20 is a standard that describes test methods for evaluating the behavior of deep foundation elements under static axial compressive load. The standard focuses on measuring the axial deflection of individual vertical or inclined deep foundation elements or groups of elements. These elements can include various types of deep foundations such as drilled shafts, cast-in-place piles, and driven piles.

The test methods outlined in the standard provide valuable information to assess the load capacity, distribution of side shear resistance, and end bearing of the foundation elements. They also help in understanding the long-term load-deflection behavior of the elements. The test results can be used by engineers to determine if the elements have a satisfactory static capacity and deflection under service load conditions to effectively support the foundation.

The standard emphasizes the importance of performing field tests to obtain reliable relationships between the applied axial load and the resulting axial movement of the foundation elements. It also acknowledges the importance of considering various factors that may affect the test results, such as residual loads in the element, interaction of friction loads, changes in pore water pressure, and other construction-related activities.

The standard provides different loading test procedures, such as the Quick Test, Constant Rate of Penetration Test, and Maintained Test, each with its own advantages and limitations. Engineers need to consider the complexity of the procedure and other factors when choosing the appropriate loading test procedure.

It is important to note that the standard does not include analysis for foundation capacity, but rather focuses on providing minimum requirements for testing deep foundation elements. Additional requirements and procedures may be specified by qualified engineers based on the objectives of a particular test program.