Astm D4945-17 Pdf [top] š Trusted Source
The ASTM D4945-17 standard covers the procedure for applying a large impact force to the top of a pile and measuring the resulting force and velocity. This method is commonly referred to as Dynamic Load Testing (DLT) or PDA (Pile Driving Analyzer) testing. It is a faster, more cost-effective alternative to traditional Static Load Tests (SLT). Key Components of the Test
The -17 revision updated the requirements for the hammer striking system. It now includes specific language regarding the use of hydraulic hammers versus gravity drop hammers, mandating stricter control over cushion stiffness and stroke length measurement. astm d4945-17 pdf
The standard provides more detailed procedures for evaluating time-dependent effectsāspecifically, soil setup (capacity gain over time) and relaxation (capacity loss). This is critical for projects in cohesive or sensitive soils. The ASTM D4945-17 standard covers the procedure for