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GEOTECHNICAL SERVICES
INTRODUCTION
CET was established in 1987 as a provider of materials quality assurance
testing to the construction industry. Since then, we have built a reputation
for quality service and excellent value.
We expanded our capabilities to include integrated ground risk
management solutions in 2012 through the addition of geotechnical and
environmental consultancy, supported by in-house investigation services.
By 2013 we had expanded our range of services to include high-quality
drainage evaluation and surveys.
Further expansion in 2016 means CET now offers a comprehensive
ground risk management service from regional offices in Maidstone,
Chesterfield and Heathrow. Soil and materials assessment services are
complemented by phased site investigations, environmental services and
a full geotechnical consultancy.
GEOTECHNICAL SERVICES
Our engineers have a thorough understanding of the engineering behaviour of
the ground and the geotechnical hazards related to different soil and rock types.
Working in conjunction with our environmental consultancy we are able to develop
a holistic approach to investigation and development of integrated geotechnical
and environmental solutions for potential development schemes.
Our comprehensive service includes, but is not limited to:
• Intrusive ground investigations (phased site investigations based on desk research and knowledge of proposed site redevelopments)
• Foundations for structures
• Substructure design assessments
• Slope stability and slope engineering
• Earthworks consultancy (specification/supervision/validation)
• Retaining structures
• Remediation
• Ground improvements and stabilisation
• Mine workings risk assessments and remediation
• Quarry design
• Pavement design assessments
• Concrete design advice
• Soakaway testing and associated advice
• Forensic investigation of geotechnical failures
• Geophysical investigations
• Expert witness
• Factual and interpretive reporting
Our geotechnical consultancy is backed by in-house, UKAS accredited laboratory soils testing to BS 1377 and other relevant British and European Standards.
Our geotechnical consultancy service has direct experience in many specialist applications including:
• Rail – CET maintains RISQS “Qualified by Audit” status for site investigation, geotechnical and environmental consultancy
• Highways and drainage
• Airports and runways
• Housing
• Commercial and industrial redevelopments
• Remediation consultancy
• Earthworks assessment, design and validation
• Water environment - including over water working
• Coastal
APPLICATIONS BENEFITS
CET provides an integrated, multi-disciplinary ground risk management service.
Our Geotechnical and Environmental Teams are supported by in-house site investigation and materials testing services; an approach that allows us to deliver significant cost and quality benefits to our clients:
• By devising site specific investigations in accordance with current best practice and guidance CET can help avoid unnecessary works and the associated impacts on costs and programme.
• Our experienced and trained consulting engineers can specify and supervise complex remedial earthworks and engineering solutions, and with the back-up of in-house soils testing can provide expedited and cost effective solutions saving project costs and time.
• Our engineers will work closely with our clients and other disciplines to ensure good communications on projects and a full understanding of site development issues.
• CET will often carry out works under secondment for other consultants and geotechnical contractors. We are able to provide factual or interpretive reporting, but our clients can be assured that our works will always be supervised and reported by qualified and experienced engineers.
West Anglian Main Line CET was engaged to undertake a ground investigation for proposed enhancement
works to the West Anglian Main Line in North East London. The scheme involved
undertaking various investigation works adjacent to live running rails and overhead
electrical cables. The works, carried out over more than two years, involved various
phases including:
• Cable percussion boreholes using both conventional and cut down boring rigs
• Static cone testing
• Driven window sampler boreholes
• Dynamic probing
• Ballast pits
• TRL DCP probes
• Geotechnical and environmental testing
• Ground gas and ground water monitoring
CET has successfully delivered all the phases of works using in-house drilling
crews and staff under CET’s RISQS accreditation.
South West Trains Station Car Parks RedevelopmentCET was commissioned to undertake two tranches of investigation to inform
the detailed design and construction of eleven multi-storey car parks on existing
ground level car parks whilst they were in operation.
CET designed site investigations targeted to suit the anticipated ground conditions
on each site and provide data for both the geotechnical and environmental
assessments. The works comprised:
• Contamination investigations including Preliminary and Generic Risk Assessments (PRA and GRA) and recommendations with respect to contamination risk to site workers, end users and the environment
• Geotechnical assessments of the sites for foundation, pavement and drainage design
• Site investigation by means of cable percussion boreholes and in-situ testing
• Geophysical investigations to determine the presence of possible below ground structures.
• CCTV surveys to assess extent and condition of extent of existing drainage
EXPERIENCE
Rhodaus Town, Canterbury – New Student AccommodationThe Rhodaus Town development was a multi-storey residential development
on the site of a former Peugeot garage and workshop. CET was commissioned
to undertake a combined geotechnical and environmental investigation for two
phases of the project.
Following a comprehensive desk study, CET delivered a preliminary risk
assessment (PRA) and subsequently developed a site investigation to both provide
a detailed geotechnical assessment of the site and to validate the PRA.
Site investigations comprised cable percussion boreholes, machine-dug trial pits
and instrumentation, all provided by CET’s in-house geotechnical and materials
testing teams.
Post-investigation, CET undertook a Generic Risk Assessment; which was used to
inform the remediation strategy. Once the remediation strategy had been agreed
and approved by the local authority, CET undertook further validation testing and
provided a detailed closure report.
Working closely with the designer and the principal contractor, CET were able to
provide a complete ground risk solution. The ability to deliver phased investigations
from start to finish enables CET to maintain control over the costs and quality of the
project overall; revising the scope of the investigation as results were ascertained
and delivering best value to the customer.
CET INFRASTRUCTURENorthdown House,
Ashford Road,
Harrietsham,
Nr Maidstone,
Kent,
ME17 1QW
t. 0343 227 8545
e. enquiries@cet-testing.com
w. www.cet-testing.com
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