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Site Investigation ServicesCapability Statement
January 2016
1 // Practice Details Introduction
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Practice Status & Operational PolicyThe Practice operates as a Limited Liability Partnership and is a member firm of the Association for Consulting and Engineering (ACE).
We generally operate within the guidance frameworks laid down by the ACE and Engineering Institutions to ensure that Clients receive an independent and highly professional service.
Various appointment contracts are acceptable to the Partners to meet client and project needs.
Services Provided & Project CapabilityThe Practice undertakes feasibility studies, surveys and appraisals, design, procurement and construction monitoring, as well as providing project management and specialist report and advisory services including expert evidence work.
We act on a wide range of projects in terms of size, type and location with regular involvement in building and infrastructure projects of value to £250m. In addition to our core skills, we
have established working relationships with complementary consultants in areas such as building services, acoustic and fire engineering, ecology and noise assessments. We work with them on a sub-consultancy basis to provide an integrated engineering service should this be required.
Quality AssuranceWe operate a Quality Management System and have obtained QA Certification to BS EN ISO 9001:2008.
The Partners are dedicated to ensuring that clients are provided with consistent high quality services offering value for money.
Professional Indemnity InsuranceCampbellReith is a member of the ACE Professional Indemnity Insurance Scheme and is able to provide up to £10 million cover.
Information TechnologyCampbellReith is committed to harnessing and efficiently employing the latest Information Technology systems wherever they can maximise the quality of our design services.
Intelligent project management systems at CampbellReith ensure the latest project information is available to those who require it.
Electronic Data Management systems such as ProjectNet, Buzzsaw, A-Site and 4Projects amongst other FTP sites increase collaborative efficiencies with clients and other contractors.
We use Geographical Information Systems (GIS) to help project teams better visualise and present project data.
Our 3D drawing suites such as Autodesk Revit, enable us to model an entire project digitally, ensuring accurate and efficient collaboration. The models produced form a vital part of Building Information Management (BIM) systems for our clients.
RedR SupportCampbellReith is a regular supporter of RedR, a specialist charity who provides engineering expertise for disaster relief worldwide. (www.redr.org.uk)
CampbellReith is an independent multidisciplinary engineering practice of founded in 1960. The Practice provides structural, civil, environmental, geotechnical, highways and transport engineering services from five UK offices as well as overseas. CampbellReith has a reputation for producing imaginative, innovative and cost effective design solutions.
Services that we offer include: StructuralCivil EnvironmentalGeotechnical Highways & Transport
CampbellReith has a highly qualified team of geotechnical engineers and environmental specialists including chartered engineers, geologists and environmental scientists.
We believe that CampbellReith is best placed to add value for the client by being able to take a wider view of the issues affecting the development than a specialist ground investigation contractor.
CampbellReith can bring together the different strands of the project (land quality, infrastructure, transportation and structural engineering) to ensure that the below ground works are fully coordinated.
This allows for integrated, buildable and sustainable solutions offering savings in cost and programme.
Our CAD and GIS technicians with their expertise in 2-D and 3-D modelling ensure that our designs and recommendations are easily understood by regulators and constructors alike.
Recent changes to the development of brownfield sites and geotechnical design need to be considered in the delivery of quality at an affordable price.
Large increases in land fill tax are driving the need to be more imaginative in the remediation of brownfield sites.
2 // Services Site Investigation 08
Site Investigation Services
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We take a wider view of the issues affecting the development than a specialist ground investigation contractor.
Woolston Riverside
Site Investigation 2 // Services
The introduction of the structural Eurocodes has also changed the way that site investigation is carried out. The early investigation of problems in the ground can identify risks to budgets and yield significant savings further down the line. In all cases, CampbellReith seeks to adopt smarter methods of working and recommend cost effective investigation, remediation and construction processes.
This should not be confused with cheap investigations and routine generic solutions. The cost of thorough desk studies, intrusive investigations, considered interpretation and robust regulator consultation can be more than recouped by avoiding the need for abnormal foundations, gas protection measures or remediation for example.
Some particular areas of technical expertise are described below:
CampbellReith can provide rapid site assessments including desk studies and preliminary intrusive investigations. Our SKID database (Site Knowledge and Information database) contains the majority of the desk studies and site investigations that have been procured by CampbellReith over our 50 year history.
The reports are digitised and may be called up by a point and click system on Google Earth.
The database also includes the location of known underground tunnels, sewers and cables together with Crossrail safeguarding zones, UXO maps and geological features such as ‘lost rivers’.
This gives a wealth of ground information, historical data and so on that can be reviewed to provide a quick assessment of likely ground conditions and hazards.
Kilnwood Vale
CampbellReith provides rapid site assessments including desk studies and preliminary intrusive investigations.
Site Investigation 2 // Services
Our staff are well trained and conversant with current and regularly changing guidance for the investigation of sites.
Although we do not directly employ drilling contractors, CampbellReith has preferential agreements with local ground investigation contractors and laboratories to allow us to provide competitive rates and mobilise to site quickly.
A recent example is at Woolmore School in Tower Hamlets where it was necessary to mobilise within a few days of appointment and programme the works carefully in order to complete the works before the start of term.
Our staff are well trained and conversant with current (and regularly changing) guidance for the investigation of sites and we can utilise sub-consultants from our Approved Supplier Database where the brief requires it. This allows us to get the best information in the most efficient ways possible.
Our geotechnical engineers and environmental scientists are trained to always look for the best options for a scheme, and we regularly bring added value to projects.
Recent examples include a large residential development in north west London where we questioned the SI contractor’s design advice for a large basement and were able to demonstrate that ground movements and design loads were far smaller than had been estimated.
Another basement scheme, this time in Greenwich, had been designed to incorporate gas protection measures on the recommendation of the SI contractor.
A review of the data by CampbellReith, with limited further monitoring, confirmed they were not required, resulting in a significant saving to the contract.
Site Investigation
Our staff are well trained and conversant with current and regularly changing guidance for the investigation of sites.
UCLH Proton Beam Therapy Centre
CampbellReith has a long track record of providing innovative and sustainable remediations. Examples include Woolston Riverside – the regeneration of a former ship yard to provide housing.
The project achieved an excellent CEEQUAL rating and CampbellReith received the Brownfield Briefing award for innovative remediation design and a Ground Engineering Sustainability Award.
Staff expertise and up to date software allow us to undertake detailed analysis of geotechnical problems such as deep basements in congested sites or in the vicinity of underground tunnels. At Mile End Road our site overlay the Central line and was immediately adjacent to the Hammersmith and City.
CampbellReith led initial consultations with LUL to allow the massing of the scheme to be determined and the foundation strategy to be agreed (a combination of piled and raft foundations). Once the investigation was complete, CampbellReith carried out detailed assessments of ground movement due to demolition and construction to satisfy LUL that their infrastructure would not be adversely affected.
Finally, our GIS and CAD support staff allow us to present data and designs graphically for both simple and complex projects using 2-D and 3-D models to aid understanding by the whole project team. For the reasons given above, it is our preference to be able to fully manage the Site Investigation process, commencing with a desk study, continuing through to a Land Quality Statement, and if need be, a remediation and verification strategy. Other examples of where CampbellReith has brought added value to a project by reviewing and revising existing ground investigation recommendations are given further in this document.
2 // Services
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Site Investigation
CampbellReith received the Brownfield Briefing Award for Innovative Remediation Design and a Ground Engineering Sustainability Award for Woolston Riverside Project.
Beckton Alps
Mile End Road
2 // Services
GISSMo
CampbellReith has developed GISSMo (GIS Site Model) which creates an interactive geographically searchable library database to link to thousands of documents via an internet based GIS map site.
This offers a quick way to search for relevant location-based records particularly for complicated sites or portfolios of sites with a large amount of background information.
It gives the ability to create an extensive baseline condition assessment based upon the information obtained through surveys (environmental surveys, environmental management, drainage, utilities, contamination) together with building condition assessments, noise, air quality, ecology, UXO and other data.
The library allows the user to quickly interrogate information at a particular location and assists with managing sites and property portfolios. It can be extended to include information such as repairs and maintenance schedules or letting data.
Each user is assigned a user name and password, allowing them access to their data only.
GISSMo
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The user is assigned various tools such as viewing and querying tools and also tools for printing and exporting data and marking up maps and perform advance querying. Users can zoom and pan around the map. They can also measure distances or areas.
This provides an extremely efficient way of managing data for large or complicated sites with lots of information and CampbellReith is currently managing numerous project sites with several hundreds of documents.
3 // Experience
Elmwood Avenue, Feltham
This recent project for Catalyst demonstrates what we can bring to the NHH framework.
Good relationships with the regulators allowed us to take a firm approach to negotiations when we were called in to advise how to deal with asbestos contaminated materials which had been found after commencement.
The team had been advised that the disposal of the arisings would cost £300,000.
CampbellReith undertook a hazardous waste properties assessment, did some further investigation and negotiated with the regulator, resulting in a less onerous waste classification being accepted and a saving of £150,000.
Case Study
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Abingdon and Witney College
The SI contractor classified soils as having a high volume change potential when in fact they were medium volume change. Foundation depths were reduced by 20% with consequent savings in excavation, cart away and concrete volume.
The pile designs in the SI contractor’s report were based on the lowest recorded rock strength. CampbellReith demonstrated an appropriate design value was three times higher, significantly increasing achievable pile capacities and allowing their length and number to be reduced.
The SI contractor recommended the need for remediation using screening criteria appropriate to housing. This was too onerous and CampbellReith was able to show that remediation was not required for the proposed educational end use.
Elmwood Avenue, Feltham
This recent project for Catalyst demonstrates what we can bring to the NHH framework.
Good relationships with the regulators allowed us to take a firm approach to negotiations when we were called in to advise how to deal with asbestos contaminated materials which had been found after commencement.
The team had been advised that the disposal of the arisings would cost £300,000.
CampbellReith undertook a hazardous waste properties assessment, did some further investigation and negotiated with the regulator, resulting in a less onerous waste classification being accepted and a saving of £150,000.
Abingdon and Witney College
The SI contractor classified soils as having a high volume change potential when in fact they were medium volume change. Foundation depths were reduced by 20% with consequent savings in excavation, cart away and concrete volume.
The pile designs in the SI contractor’s report were based on the lowest recorded rock strength. CampbellReith demonstrated an appropriate design value was three times higher, significantly increasing achievable pile capacities and allowing their length and number to be reduced.
The SI contractor recommended the need for remediation using screening criteria appropriate to housing. This was too onerous and CampbellReith was able to show that remediation was not required for the proposed educational end use.
3 // Experience Case Study
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UCLH Proton Beam Therapy Centre This new centre located in central London, represent an extremely complex and complicated construction project, requiring many difficult and unprecedented construction challenges to be tackled.
For example, the confi ned nature of the proposed London site andits location presents a number of challenges. Not least of these isthe requirement to construct the largest habitable basement everconstructed in central London.
The excavation for the proton beam therapy centre will require the excavation of a 26 m deep basement, with a volume of approximately 43,000 m³, over twice the size of that for TheLondon Clinic.
Kilnwood Vale
The Kilnwood Vale site consists of about 132 hectares of land, around 42 hectares of which, comprises land previously developed for inert waste management activities.
CampbellReith designed and supervised the geotechnical treatment for the former landfill area of the site. Up to 15 m of residual fill material was treated via the excavation, screening and selective placement of the upper layers combined with a surcharge operation for the deeper layers of fill. As part of the works, a low permeability mineral clay liner was constructed in order to control infiltration. The works were monitored during the surcharge period via the use of settlement plates, extensiometers, vibrating wire piezometers and surface settlement stations.
Extensive use was made of the civils 3d package PDS and GIS in the development of the remediation design and the earthworks model in order to provide a sustainable earthworks balance.
Portobello Square
Case Study
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3 // Experience
The increasing tendency for flats to have basement car parking and plant provision has presented the challenge of developing efficient and economic basement designs to maximise the value of parking spaces.
As the greater depth of foundations under a basement permits higher soil bearing pressures than for foundations at ground level, we have been able to utilise this to provide reinforced concrete spread pad foundations for buildings that would otherwise have piled foundations.
On congested urban sites where there is little working space for the construction of traditional RC retaining walls, we have used piled perimeter walls in conjunction with internal pad foundations.
This has proven to be the most economic structural form and has worked well on a number of projects including Portobello Square, Block B5 at Clapham Park estate and Merle House at South Kilburn.
ACS Cobham
CampbellReith was appointed to provide bid support in the fields of civil and structural engineering, land quality and geotechnics.
A review of the existing ground investigation information allowed the bearing capacity to be increased from 100 kPa to 150 kPa.
Foundation sizes were therefore considerably reduced providing a saving of £20,000.
This, together with other economies that CampbellReith was able to make in design, contributed to the contractor being successful in his bid.
3 // Experience Case Study
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Heston Schools
• When CampbellReith was appointed, the remediation strategy had been agreed with the local Environmental Health Officer. It comprised the excavation of all Made Ground in soft landscaped areas with a 600 mm clean cover of imported subsoil and topsoil. The proposed foundations comprised a piled solution with suspended floor slabs. In order for the scheme to proceed, it was necessary to undertake significant value engineering.
• CampbellReith’s review of the information indicated nothing to suggest significant contamination across most of the site. We recommended further site investigation to better define the problem and were confident that additional data would demonstrate a reduced need for remediation. The investigation was designed to also confirm to depth to the River Terrace Gravel around the new school buildings, which might permit the use of pad foundations.
• The additional SI and the detailed assessment by CampbellReith totalled approximately £20k. However, this was money well spent. The investigation satisfied the EHO that remediation of the playing fields was not required. Where localised contamination was present, CampbellReith agreed remediation methods which could be undertaken as part of the overall ground works, eliminating the need for dedicated plant and reducing delay. The further exploratory holes also permitted the construction of pad foundations. Savings in remediation totalled approximately £80k and in the foundation solution, a further £50k.
• These economies, together with other savings identified by CampbellReith, allowed the project to move forward.
For the scheme to proceed, it was necessary to undertake significant value engineering.
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CampbellReith Hill LLP. Registered In England & Wales. Limited Liability Partnership No OC300082
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T: +44 (0)1675 467 484F: +44 (0)1675 467 502E: [email protected]
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