Residential development – 162 new homes (100,000m³ of earthworks/soil
Developments’ role as enabling works contractor was to carry out earthworks and
drainage for the site and leave a soil-stabilised end product for roads and
The major problem with numerous new sites throughout Scotland and Northern
England comes from poor quality (waterlogged, peat, overlying) materials being
inherent within the sites. The role of a soil stabilisation contractor is to
ensure delivery of a foundation solution that meets the required loading
specification for the roads, building platforms, etc.
That stabilised product
is produced to 95% dry density with various CBR requirements. Due to the
stringent end bearing requirements for roads and housing platforms, Ground
Developments became the UK industry leader for residential soil stabilisation
solutions, leading to higher end product outputs for their clients.
achieve these solutions, the Ground Developments team took to encouraging
engineers to provide attribute rich datasets, but sometimes the level of
information coming from service providers and some engineers was still lacking.
Therefore, in a roundabout way, the as-built data going back to the client was
often better than the data being received. In some respects, they were almost
‘reverse engineering’ the site.
As the requirements for stabilisation became paramount, the utilisation of
technology became even more important. Ground Developments invested in 12d Model
software for design and survey purposes, to ensure they could deliver quality
results faster and more effectively. Through the use of 12d Model and GPS
machine control, they revolutionised the development of soil stabilised building
platforms in the region.
They used several
facets of 12d Model to assist in their works, including:
Detailed Alignment Design for road design, boxing and haul roads
Volumetrics and TIN Analysis for volumetrics (inclusive of on-site instant
analysis using 12d Field
Field for as-built and on-site analysis, monitoring and data collection.
They also used several other features within 12d Model for quality assurance
purposes, inclusive of pipe sizing, conformance surveys, as-built surveys, and
reporting and visuals.
The primary benefit
came from the delivery of exact layers in stabilised platforms. Using a
combination of binders and soils, the team generated a mixed soil solution which
had to be laid in exact depths to meet compliance requirements. This was
generated from surveying the excavated levels using 12d Field, and then analysis
of the slope/surface. They then further compared the final formation level. From
this, they produced an optimised design surface for Machine control. They could
then export the data almost instantly to ensure grading the layers to exact
Upon completion of the
layers, they carried out conformance surveys to ensure that they were delivering
within design tolerances.
The team further
utilised 12d Field for drainage works in both setout and as-built. The
advantages of utilising 12d came from the chains that they set up for processing
the datasets into a deliverable output. This includes the sizing of pipes (which
assists in working out inevitable conflict that the utilities providers would
then have with the constructed networks). This provided the team with the
advantage of being in the best position to provide information on the site.
They automatically generated drainage deliverables through chains and the
utilisation of some handy macros for outputting. This automatic generation was
also implemented for their volume and site analysis, which again was hastened
through chains. They were greatly advantaged by the ability to generate these
outputs while on site, using 12d Model with 12d Field.
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