- SITE INVESTIGATION AND GROUND INVESTIGATION SERVICES -With an increasing proportion of developments occurring on previously developed 'Brownfield Sites' and ever more challenging greenfield sites, there has never been a greater need to carry out adequate site investigations. A well designed site investigation can often lead to project cost savings in the long term by allowing contractors to foresee potential problems. Structural Soil Limited employs a wide variety of site investigation techniques including fieldwork and laboratory testing to suit any size of project. Our teams of engineers and geologists can advise on suitable methods for individual projects ranging from small scale subsidence investigations to foundation and earthwork design projects for major civil engineering works. Most investigations also include an environmental consideration of the site.
Generally the following site investigation techniques are employed for the majority of projects:
Results of site investigations can be presented as either factual or interpretive reports with recommendations relating to both geotechnical and environmental considerations. Site Investigation data can be provided in the industry standard AGS format in accordance wth the 'Electronic Transfer of Geotechnical and Geoenvironmental Data' (3rd Edition) : 1999, Published by the Association of Geotechnical and Geoenvironmental Specialists (AGS). AGS formats AGS-M and AGS 3.1 are fully supported. The report can also be supplied in a fully hyperlinked PDF format on CD-ROM or can be sent by email.
Trial PittingTrial pitting can be carried out by a variety of methods from hand dug pits to machine excavated trenches. Trial pitting is generally carried out to a maximum depth of 4.5m with standard excavation plant and, depending on soil conditions, is generally suitable for most low rise developments. All trial pit investigations are supervised by experienced engineers with a thorough understanding of geology and soil mechanics. Additional testing in trial pits can include soakaway testing, CBR testing and in-situ strength testing.
Window SamplingWindow sampling is carried out by either tracked percussive samplers or hand held pneumatic samplers. Samples are retrieved in seamless plastic tubes for logging by a suitably qualified engineer. Window sampling is particularly suited to restricted access sites, contamination investigations, and where disturbance must be kept to a minimum. The track mounted equipment is also capable of carrying out dynamic penetrometer testing. This is a continuous soil test procedure which enables the relative density or strength of the ground to be assessed to depths of 10m or more.
Cable Percussive BoreholesSuitable for most projects, cable percussive boreholes are a common method of site investigation. Using a land rover towed rig or a specialist cut down rig suited to restricted access locations most sites can be investigated. In-situ testing techniques including Standard Penetration Testing, Permeability Testing, Borehole Vane Testing and Packer Testing can all be carried out in the boreholes in order to provide information for geotechnical design. Disturbed and undisturbed samples are retrieved from the boreholes for inspection and logging by engineers and subsequent testing in our laboratories.
Rotary BoreholesRotary drilling techniques are employed where boreholes are required into very dense gravel or bedrock. Samples of bedrock are recovered in seamless plastic tubes for subsequent logging by a suitably qualified engineer and for laboratory testing. Most of our rotary coring work relies on the use of our Comacchio MC300 drilling rigs which can also obtain continuous samples of soils using dynamic sampling equipment. The rigs are suitable for limited access works.
JUNE 2010
Structural Soils Ltd - Comprehensive Site Investigation Services
Soil Testing | Rock Testing | Aggregate Testing | Concrete Testing | In-Situ Testing Geotechnical Consultancy | Geotechnical Expert Witness Contaminated Site Studies | Environmental and Historical Desk Studies | Environmental Site investigation | Environmental Consultancy Drilling Services - Cable Percussion - Rotary Coring - Rotary openhole - Trial pitting - Window sampling - Dynamic Probing Geotechnical Equipment Hire | About Us | Site Map
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