Site Investigation / Ground Investigation
With an increasing proportion of developments occurring on brownfield sites and ever more challenging greenfield sites being chosen for development, there has never been a greater need to carry out adequate site investigations. A suitable site investigation can often lead to project cost savings in the long term by enabling contractors to foresee problems and thus make savings.
Structural Soils employs a wide variety of site investigation techniques to suit any size of project. Its team of engineers can advise on suitable methods for individual projects ranging from small-scale domestic investigations, such as house extensions and new builds, to larger ones for major civil engineering works. The investigations usually include both geotechnical and environmental work.
Many investigations begin with a desk-based study of the available information and, when considering the risks posed to a development by current or previous potentially contaminative uses of the site and its surrounds, a preliminary risk assessment (PRA).
These studies are followed by intrusive site investigation techniques employing techniques such as trial pitting, window sampling and dynamic testing, cable percussion and rotary boreholes, window sampling and dynamic probe testing may be carried out alongside other in situ testing such as plate loading tests or nonintrusive geophysical investigations.
Field investigations are normally followed by both geotechnical and chemical testing. Geotechnical testing is undertaken in the company’s UKAS-accredited laboratories in Bristol, Hemel Hempstead and Castleford, whereas chemical testing is undertaken in laboratories operated by Envirolab (an RSK company) in Hyde, Manchester.
Where required owing to site conditions, longer-term in situ gas and/or groundwater monitoring of a site is carried out by our specialist monitoring team.
The results of site investigations can be presented as either factual or interpretative reports; the latter give recommendations relating to geotechnical and environmental considerations. Exploratory hole and other test data are presented in accordance with the latest British Standards and Eurocode 7. High-quality, computer-generated reports are produced in PDF format and hard copies are supplied if required. Site investigation data can also be presented electronically in AGS format.
Structural Soils is an experienced principal contractor and can assume the relevant duties under the Construction, Design and Management (CDM 2015) Regulations. The company has various construction- and other industry-related accreditations and provides services to a wide range of clients, including some major companies with which it has framework agreements.. The company is certified to an integrated management system encapsulating ISO 9001, ISO 14001 and OHSAS 18001.