The site comprises the motorway junction gyratory and on and off slips. Improvements to the existing highways infrastructure, including widening both the gyratory carriageway and the approach roads were required as part of the Section 278 works for a large adjacent housing development. Due to the high traffic volumes Highways England required that all intrusive works should be completed during night shifts with temporary land closures. The intrusive works themselves consisted of windowless sampling, machine excavated trial pitting and BRE365 soakage testing.
The works were undertaken in accordance with the DMRB HD22/08, Managing Geotechnical Risk, and included detailed review of Highways Agency Drainage Data Management System (HADDMS). Reporting included the provision of the Statement of Intent, combined Preliminary Sources Study (PSSR) and Ground Investigation Report (GIR) and Geotechnical Design Report (GDR).
Completion of ground investigation during night works lane closures
Liaison with Highways England and West Sussex Highways
Preparation of Preliminary Sources Study (PSSR) and Ground Investigation Report (GIR)
Preparation of Geotechnical Design Report (GDR)
LEAP was awarded the contract based on our experience of highways works. This enabled us to provide an accurate quote and timescales with costs kept within or below budget and report deliverables on time. Works were carried out safely and securely to the satisfaction of Highways England.
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