HS2 – Section C1 – Pynesfield Quarry Ground Improvement Works
- Project Type Rail
- Client HS2 - ALIGN JV (Bouygues TP, Volker Fitzpatrick, Sir Robert McAlpine)
- Company Involvement Earthworks, Drainage
- Form of Contract NEC3 Option B
- Dates September 2020 - April 2021
- Location Hertfordshire, United Kingdom
Pynesfield quarry was a disused quarry that required ground remediation in order to allow for the placement of the treated tunnel arisings from the Chilterns twin 10-mile tunnels that form part of HS2 section C1.
This contract comprised of the following scope:
Key Features
- Site De-vegetation
- Asbestos Management
- Drainage Works
- Retention Pond Construction
- Regrading of Site to Required Profile
- Installation of 108,000m2 of Geotextile & Geogrid
- Import and levelling of 50,000T of general fill
- Import and Placement of 100,000T of Granular Fill for a Combined Drainage Blanket and Working Platform Layer
- Installation of 77,000 Vertical Band Drains
