Ground Investigation

Providing a comprehensive service with experience in both technical and field operations

We are aware of the increasing proportion of developments which require the use of brownfield sites and the access challenges that some of these sites face. As a result, we think it is important to carry out correct and adequate investigations which cover all areas and that can, in the long term, have major cost savings during the construction phase.

We offer our clients two key benefits - reliability and knowledge.

Reliability, because we understand the commercial issues which can arise if insufficient and delayed information is given.

Knowledge, because the information on ground conditions is essential to the design and construction process. 

The services that we offer include:

  • Desk Study
  • Soil and Rock sampling
  • In situ Testing
  • Instrumentation and Monitoring
  • Geotechnical and Geo Environmental Laboratory Testing
  • Topographical Surveys
  • Factual & Technical Reports
  • Plant Operator Licence (for Network Rail sites)
  • Principle Contractor (for Network Rail)
Ground Investigation

Generally we employ the following site investigation techniques in our projects:

Trial Pitting

Trial pitting can be carried out using a variety of methods from hand dug to machine dug, and can be carried out to a depth of 4.5m with normal plant.  All pitting investigations are supervised by an experienced engineer.

Window Sampling and Dynamic Probing

Window sampling is carried out using either a track mounted drilling rig or, in hard to access areas, a hydraulic jack hammer.  The soil samples are recovered within a plastic liner which is placed in a thick walled sampler.  The track mounted rig is capable of undertaking both Standard Penetration Tests (SPT’s) and Super Heavy Dynamic Probes (SHDP), and we can also undertake Heavy Dynamic Probes (HDP) using a lightweight Geotool rig.  All rigs have had the drop weight measured for Energy Ratio (Er). 

Cable Percussion
This is a common method for progressing a borehole into soft ground material.  The rig is towed by a 4x4 vehicle and can undertake in situ tests such as SPT’s, vane tests and permeability testing.  Samples, both disturbed and undisturbed are recovered from the borehole which can be used for both geotechnical and geo environmental testing.

Rotary Boreholes
Rotary drilling techniques are used when drilling into very dense gravels and bedrock.  The samples can be recovered in plastic liners and logged by a suitably qualified engineer and for laboratory testing.

The results from the site work can be presented in either factual or interpretive report format.  The exploratory holes information is presented using the guidelines of Eurocode 7 and, with our current software, can be presented electronically in AGS format. 

We are certified to an integrated management system which encapsulates ISO 9001, and ‘Link up’ approval for Network Rail.

Ground Investigation

Our Site Investigation team are here to answer your questions

Aspin provides extensive Site Investigation services to various sectors of industry - we have a highly experienced team of consultants in place across 7 UK locations.