Soil Environment Services

We assess soils on sites ranging from nature reserves to contaminated building sites

Soil and Ground Thermal Resistivity (STR)

Soil or ground thermal resistivity (soil thermal conductivity or soil thermal diffusivity) testing is required to determine cable design and or trench design prior to cable placement.

Soil Environment Services Ltd can test the ground prior to or during any site works, within trenches or in the laboratory. We test soils, rocks and cable bedding materials such as Cement Bound Sand  and in recent years have worked with some of the biggest cable laying companies on the longest cable routes in the UK. Of critical importance is the accuracy of resistivity measurements both on site and in the essential supporting laboratory assessments. Soil Environment Services Ltd is conducting on-going research in this area to understand the soil physics of the environment in order to deliver highly accurate thermal resistivity measurements. Please see our information sheet.

 

Field Testing

Our range of equipment is designed to allow full flexibility with in-field testing.

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We have experience working in difficult conditions and are able to tailor the equipment to the site.

 

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Thermal probes can be inserted into rock or gravel on site and these very often occur in the same trench.

 

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We will assess the specific needs of the project and the environment within which the cable will be operating to provide specific and accurate measurements.

Testing may be carried out in boreholes, test pits or trenches, or we can take cores out of soil, rocks or roads.

 

 

Laboratory work

Thermal resistivity, thermal conductivity or thermal diffusivity of soil, rock  or other material, e.g. Cement Bound Sand (CBS)  can be measured in the laboratory and is essential to both support field measurements and assess thermal properties under a range of conditions.  We have our own dedicated laboratory set up for thermal testing of soils, rocks and CBS.  We are currently progressing through the preparation of systems and procedures for a UKAS accreditation application.

 

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Normally we test to and using  the following specifications:

 

IEEE 1997 Std 442 ENAT 97-1, Version 2  2016

National Grid TS 3.05.07

BS 1377 – Compaction

 

All laboratory work is overseen by Dr Robin Davies who has a PhD in soil physics (soil stabilisation) and many decades of high quality research laboratory experience for the former British Coal and central government funding agencies. Several recent years of laboratory work have  increasingly been focussed on  undertaking thermal testing for aggregate supply and cable installation companies.

 

All of our laboratory staff have science degrees, have worked on central government funded science projects which included laboratory work  and have spent a number of recent years undertaking soil/rock thermal testing.

 

 

UKAS accredited laboratory verification of the mechanical test procedures can currently be supplied if needed.

 

 

If you need CBS testing in the laboratory or field, please call us to discuss your exact requirements as sample treatment prior to testing is crucial.

 

 

Full project consultancy experience

We tailor testing parameters to your specifications in order for you to design cable trenching and bedding on a project specific basis.

All testing and outputs are conducted to the highest industry standard and in line with current international specifications.

 

Recent project examples

OMEXOM Crossaig Substation – Mull of Kintyre

ABB – Caithness to Moray 120MW, 50km on land cable route https://www.ssepd.co.uk/CaithnessMoray/

National Performance Centre for Sport – Heriot Watt University http://www.hw.ac.uk/news/work-gets-underway-oriam-scotland-s-sports-21858.htm

INSTALCOM – Sheffield roadway dry mix

 

Ground testing prior to cable placement. United Utilities – National Grid Feckenham Sub Station 

OLYMPUS DIGITAL CAMERA

 

CBS testing above the cables.  Crossaig Substation – OMEXOM

Crossaig Substation - above cable CBS testing

 

CBS testing during cable pulling.  Crossaig Substation OMEXOM

Crossaig Substation - below cable CBS testing

 

Bentonite testing within cable ducts.   Caithness-Moray HVDC cable.

Caithness Moray HVDC cable - bentonite testing

 

Racebank Windfarm Landfall – Kings Lynn

Race Bank wind turbine landfall

 

RECENT CLIENTS

 

Contact Dr Robin Davies  to discuss your requirements;

rd@soilenvironmentservices.co.uk

Telephone

Office – 01661 844827

Mob – 07776474028