Services

Also commonly referred to as Window Sampling and Windowless Sampling, Dynamic Sampling offers a quick and cost effective solution for the construction of boreholes and monitoring points.

Trinity Geo's in house qualified drilling team can often offer quick mobilisation times to suit your programme needs.

Strengths:

- Very cost effective method of borehole construction in soils.

- Small drilling rig able to operate in areas of limited size and space, and/or restricted access.

Weaknesses:

- Dynamic sampling often struggles to progress through granular material such as gravels.

Cable Percussive drilling is a traditional ground investigation technique able to construct boreholes and monitoring points to much greater depths than dynamic sampling.

To ensure the safe operation and successful drilling of boreholes it is essential that competent drillers are used. Trinity Geo only works with skilled and qualified drillers to ensure the success of projects they are involved in. 

Strengths:

- Can construct boreholes in soils in excess of 50m depth.

- Can install effective environmental seals when working on environmentally sensitive projects where migration of pollutants is a risk.

Weaknesses:

- The success of cable percussive boreholes is strongly dependant on the competency of the drillers involved.

Rotary drilling involves the coring and recovery of the ground to obtain core samples.

Rotary drilling is often thought of as a rock drilling technique but can also be used to core soils and obtain high quality samples.

Strengths:

- Able to progress boreholes through soil and rock to depths in excess of 100m.

- Using triple tube coring techniques, high quality samples can be recovered.

Weaknesses:

- Can be more costly than other techniques, and also requires more space and equipment.

Trial pitting is a very cost effective and often quick technique that involves the excavation of material for visual logging and sample collection. 

Strengths:

- Very cost effective and gives a good opportunity to assess more practical ground conditions such as excavatability and stability of excavations.

- Provides an opportunity for more detailed logging of strata encountered.

- Able to conduct in situ tests such as Soakaway Tests for drainage design.

- Can recover large sample volumes often required for aggregate testing.

Weaknesses

- Careful planning and execution of trial pits is required to ensure they are carried out safely.