Dynamic Sampling

Dynamic Sampling is a well-established drilling technique for the construction of relatively shallow boreholes within superficial deposits.

The borehole is advanced by driving a hollow steel sampling tube into the ground. Inside the sampling tube is a plastic liner into which the soil is retained. When the tube is extracted, the liner can be removed and split to enable logging and sampling by a Geotechnical Engineer.

Our Dynamic Sampling crews are directly employed and are NVQ qualified in Land Drilling and British Drilling Association (BDA) audited to ensure high standards in both safety and quality. The crews are supported by our qualified Geotechnical Engineers who undertake supervisory and technical duties including borehole logging and sampling.

What is Dynamic Sampling used for?

This technique is suitable for sites with access restrictions and for environmental sampling including the installation of shallow groundwater and ground gas monitoring wells. It can also be a useful technique to supplement the excavation of trial pits.

Strata Geotechnics dynamic sampling on the railways

What are the advantages of Dynamic Sampling?

  • Our Dynamic Sampling rigs can also perform Dynamic Probing which involves driving a standard size cone into the ground and recording the number of hammer blows per 100mm of penetration. This gives an indication of soil strength and is useful to gain further information at depth after the Dynamic Sampler cannot be advanced any further.
  • We also operate Lightweight Modular Dynamic Sampling Rigs which can be dismantled into hand portable components and then re-assembled at the drill site. These rigs are ideal for very restricted sites, such as basements, inside buildings and Rail projects.

Common Uses

  • Geo-environmental sampling and monitoring
  • Restricted access sites
  • Supplement trial pitting
  • Hand portable systems available
  • Railways
  • Basements
Van Elle's ground investigation specialists - Strata Geotechnics - delivering dynamic sampling trackside