Hammer Performance & SPT Energy Analysis
The standard SPT test depends greatly on the energy transferred during each hammer impact. Because equipments and procedures are not really standardized there is a huge variation in the values for measurements done with different setups and systems. SPT values also need to be standardized to N60, else serious errors may result in understanding correct SPT values. Geo Dynamics is equipped to measure the actual energy transferred to the SPT rod to evaluate the actual efficiency of the driving system. Based on these measurements, corrections to the N-value are applied to improve the SPT tests. We can also monitor hammer performance for diesel and hydraulic hammers to measure their actual energy transfer. This is greatly useful for contractors to make decisions before purchasing expensive systems and also helps designers refine their calculations based on actual hammer efficiency recorded on site.