Static Load Tests can be performed to validate foundation design assumptions regarding the axial compression or axial tension resistance provided by a deep foundation element, or its deflected shape under a lateral load. Tethys performs both static load tests to meet the need of project design tests for construction quality assurance.
Depending on the project requirements, loading condition, and deep foundation type. After processing the collected load test data, Tethys engineers prepare a final report summarizing the load-movement results. These results can be compared to the specified load test interpretation criteria to determine the deep foundation’s capacity or nominal resistance. Load-deformation behavior at other depths, as well as load transfer to the soil along the shaft length can also be provided depending upon the instrumentation. Static load tests are standardized by ASTM D1143, Standard Test Methods for Deep Foundations Under Static Axial Compressive Load; ASTM D3689, Standard Test Methods for Deep Foundations Under Static Axial Tensile Load; and ASTM D3966, Standard Test Methods for Deep Foundations Under Lateral Load.