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Foldable Drilling Rig

GSTL have recently aqquired a foldable drilling rig which allows us to expand on our site works. This piece of equipment runs in parallel with our rail agenda as the drill rig is foldable, light in weight and will allow enhanced accessibility on sites and is therefore ideal for use at environmentally sensitive sites and for rail side work. More on the railways page

Typical Site Scenario

Documents and links

Dart Standalone

Drilling Services

Item UKAS Description Unit

GSTL Competitor rigs are mechanically simple and easy to operate, the rigs are designed for use by a single operator and drilling can begin within minutes of arrival on site.

Because the units are light in weight, site disturbance is minimal, making the Competitor ideal for use at environmentally sensitive sites.

One man drilling platform

Rig Features

  • Highly mobile and manoeuvrable
  • Can be tracked up slopes
  • Will pass through a standard domestic doorway
  • Ideal for work on sites with restricted access
    • close-up against walls
    • inside buildings
    • almost anywhere it would by other techniques be difficult to obtain samples

Sampling is achieved by a percussive method. The drive mechanism consists of a chain-driven drop weight that repeatedly strikes an anvil, driving the rods and sample tubes into the ground. The rig can drive sample tubes into all soil types. It is not designed for sampling or coring in hard rocks.

Borehole Testing

  • Continuous Soil sampling
  • Undisturbed Soil Sampling, U100
  • Dynamic Probing (DPH and DPSH)
  • Standard Penetration Tests
  • Window Sampling
  • Windowless Sampling
  • Installation of Monitoring Wells
  • Determination of Piling Depths
  • Location of voids and buried obstructions
  • Archaeological and other sensitive work

The weight and the drop height are adjustable, enabling Standard Penetration Tests And Dynamic Probing (Lost Cone) Tests to be carried out as well as soil sampling. Blow rates up to 50 per minute can be achieved when driving sample tubes into the ground.

After tools have been driven into the ground to the required depth, they can be easily Extracted using the integral hydraulic jack which has a 7-tonne pull back capacity.

  • Ground Bearing Determinations
  • SPT'S and Vanes in-situ
  • Subsidence Investigations
  • Water Table Monitoring
  • Methane Monitoring
  • Contamination Investigations
  • Undisturbed Samples for 38mm Triaxials
  • Sample Recovery for Laboratory Testing.

Other Services

  • Dynamic Probe testing
  • Soakage Tests (to NHBC Spec or BRE 365)
  • Trial Pit Excavation
  • All laboratory testing carried out in our UKAS approved lab
  • CBR PLATE BEARING and SRD Testing
  • CLEA - Defra Sampling Testing (with UKAS and MCert accredited lab) and reporting
  • Brownfield and Derelict Site Investigations
  • Concrete Coring