Dynamic Penetration Testing

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Dynamic Penetration Testing (DPT), commonly referred to as Dynamic Probing (SHDP or HDP), is a fast and relatively low cost Ground Investigation method. It involves driving a cylindrical sacrificial or fixed cone into the ground using a high frequency percussive hammer. The cone is attached to a 1m section steel rod with a nominal diameter of approximately 35mm and graduation markings set at 100mm intervals. 

Blows per 100mm are recorded and after every 1m section, a further rod is added and the process is continued until the probe refuses to penetrate the ground or the test reaches the required depth.