A section of new dual carriagway was required to by-pass a village adjacent to Exeter International Airport in Devon. South West Geotechnical were
instructed to carry out a factual and interpretative ground investigation for the
works.
Field work included ten cable percussive boreholes, twenty trial pits, in-situ
CBR testing, and soakaway testing.
Laboratory work included extensive suites of compaction, MCV, CBR and
drained shear box testing.
All drilling, laboratory and reporting works were carried out using SWG’s own
in-house resources.
The 1km route included
deep cuttings, sidelong
embankments, a cut and
cover tunnel beneath the
flight path into Exeter
Airport, various
structures, and a SUDS
soakaway system.
SWG’s approach was to
create an accurate and detailed geotechnical model of the site, and then to
classify all the materials encountered. These were then analysed for all the
required parameters for design.
Cutting and embankment slopes
were designed using Slope/W
software, and soakaways using
BRE 365 methodology and
software.
Cutting & embankment slope Diagram >>
Geological Long Section Diagram >>
