The difference between physical and mathematical meaning in the dynamic load test

Dynamic Load Test (DLT) on piles has been used as an alternative to Static Load Test (SLT), offering cost savings and time reduction. Sensors at the pile top capture signals during the hammer impact. These signals are analyzed using the Signal-Matching Method to adjust calculated curves to measured data, varying parameters such as shaft friction and toe resistance. Different solutions may yield good Match Quality (MQWU). In CAPWAP, quality is traditionally assessed through MQWU, indicating the error between measured and calculated curves. Historically, DLT and SLT correlate well through the Davisson Method. However, Murakami (2015, 2019) observed discrepancies between simulated load vs. displacement curves of CAPWAP and SLT, introducing the Match Quality of Settlements (MQS) to enhance the Physical Meaning of the analysis. Improving MQS also enhances MQWU, achieved by the determination of the pile shaft quake along with two boundary conditions, constituting a New CAPWAP Procedure, resolving the variability of results uniquely. This paper explores the concepts of Physical and Mathematical Meaning in DLT and their impact on the execution and interpretation of CAPWAP.