A14 CAMBRIDGE TO HUNTINGDON IMPROVEMENT SCHEME

The A14 improvement scheme project, as a whole, is valued at £1.5bn, and includes a major new bypass to the south of Huntingdon, along with the upgrading of 21 miles of the existing road.  PJ Davidson was awarded the contract to construct an extruded concrete barrier and slip formed drainage works for the A14 ultra site scheme.

The A14 bypass is split into five major sections:

• Section 1 (widening A1 between Brampton and Alconbury)
• Section 2 (A1 widening Brampton Hut to Brampton and A14 New Ellington junction to East Coast mainline railway)
• Section 3 (East Coast mainline railway to Swaversey)
• Section 4 (Swavesey to A14/M11 Girton interchange)
• Section 5 (A14/M11 Girton interchange to Milton)

We are proud to be using our Davidson Concrete Barrier (DCB) for the concrete road safety barrier system, and 1m/1.4m Surface Water Channelling and 250/375 Slot Drain solutions for the alternative linear drainage channel system.

Key project statistics

The works we are delivering consist of:

• 41km of our Davidson Concrete Barrier (DCB), including 4km of Variable Concrete Barrier (VDCB), equivalent to 16,400m³ of concrete
• Construction of our DCB over six structures, including an 800-metre-long River Great Ouse Viaduct
• 16km of Surface Water Channel (SWC), mainly for the A1 and Ellington diversion
• 34km of alternative linear drainage channel systems (375 Slot Drain) for Section 2 and Section 4
• 23km of alternative linear drainage channel system (250 Slot Drain) for Section 3
• 1km of Slip Formed Retaining Wall (SFRW)
• Value engineering solution used at outlet positions for 250 Slot Drain system
• 50,000m³ of concrete to be extruded via slip form pavers