Dynamic Probing which is also known as Dynamic Penetration Testing (DPT), is a fast and cost-effective ground investigation technique.
Dynamic Probing 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 diameter of 35mm and graduation markings set at 100mm intervals. Depending on the chosen method, the drop height can be adjusted as required.
Blows are recorded per 100mm 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.
The depth of penetration achievable is dependent on the density of the material encountered. For a typical project with dynamic probes driven to depths between 5.0m and 10.0m at least 50m of dynamic probing can be achieved in a day.
The results from Dynamic Probing can be correlated directly to a standard penetration test “N” value. The results are plotted in tabular and graphical form, providing a visual interpretation of the different soil strata encountered.
Dynamic Probing is able to locate the boundaries between strata of different densities and driving resistance. The results can be used to establish the sub-surface presence of obstructions like old foundations or buried objects.
The results are also used to identify soft areas, voids and cavities within the soil such as dissolution features in chalk or mine workings.
JS Drilling have decades of experience in Dynamic Probing having worked on Dynamic Probing projects in Ireland, the UK and Africa. JS Drilling has an extremely impressive client base, including multinationals, blue chips, leading building and mining companies, prominent engineering and environmental consultants, local authorities, utilities, semi-states and other government departments.
At JS Drilling, we pride ourselves on our problem-solving abilities. Our in-house design team develops focused remedial strategies which we can take through from conceptual design and regulator negotiation to full scale implementation, final validation, regulatory approval, and every stage in-between.
Contact us for all of your Dynamic Probing requirements.