Fildrain Case Study

Concrete Channel Drainage, Fildrain Type 10, A1 Leeming to Barton Scheme, North Yorkshire, UK

Project Information

Client:Highways England
Contractor:Carillion – Morgan Sindall JV
Consultant:AECOM / Grontmij
Product:Fildrain Type 10 / Fildrain Type 6
Quantity7,000 lin metres
Benefits:- High strength, keying effect
- Excellent flexibility
- Bespoke dimensions
- BBA Approved

The A1 Leeming to Barton upgrade has replaced the existing 12 mile stretch of dual carriageway with a new three lane motorway. It will also include the provision of a new local access road alongside the new motorway, improving safety for local traffic from the surrounding communities. Access to the strategic road network is via a new grade separated junction at Catterick and an improved junction at Scotch Corner.

Award Winning Project

The A1 Leeming to Barton Upgrades won the Highway Awards category for Environmental Sustainability in October 2017. The judges commented "Really impressive saving with 100,000 m3 of existing pavement and 97% of waste diverted form landfill". The assessment criteria for this award includes carbon footprint reduction, local envirnment benefits, sustainable material use and reduction of CO2. ABG Fildrains made a major contribution to all these criteria.

The Challenge

Highway drainage has two objectives: safety of the road user and longevity of the pavement. Trapezoidal channels are the preferred choice to remove surface water. Provision of effective sub-surface drainage will maximise longevity for the pavement avoiding softening of the road sub layers. The consultant chose the Fin and Narrow subdrainage system detailed in the standard Highways Construction Details (HCD) F Series. This uses a shallow V channel to drain surface water and a Type 10 findrain (HCD F21) combined with a Type 6 findrain (HCD F18) to drain sub surface water. The challenge for the contractor was to find the required BBA approved, cost effective, combined solution which gave additional benefits to the client, minimising potential maintenance in the future and maximising the long term asset value.

The Solution

The ABG Fildrain Type 10, a BBA certified system, was selected due to its optimised design which met and exceeded all the criteria specified by the consultant. Additional benefits include the strong but flexible HDPE cuspated core creating a regulated surface which includes a keying effect to the concrete to aid slip forming. The well bonded geotextile and dimpled surface gave a high friction surface to the underside. The ABG Fildrain Type 10 is compatible with the ABG Fildrain Type 6 edge drain on one side of the channel and allows the choice of the two alternative corner details as illustrated in HCD F21, as shown opposite.

The ABG Service

ABG provided technical and practical support from all stages of design to the logistics of supply. The ABG Fildrain Type 10 was manufactured in site specific widths at our factory in West Yorkshire which saved installation time on site.

ABG Fildrain Type 10 fin drain geocomposite is used for highway linear drainage applications
Channel extruded directly onto ABG Fildrain Type 10Channel extruded directly onto ABG Fildrain Type 10
ABG Fildrain Type 10 and ABG Fildrain Type 6 integrated under channel drainageABG Fildrain Type 10 and ABG Fildrain Type 6 integrated under channel drainage
F21 Type 10 Under Channel Drainage combined with Type 6Highway Construction Detail: F21 Type 10 Under Channel Drainage combined with Type 6

Contact ABG today to ask for ABG specification clauses in line with SHW Clause 514 and other project specific requirements using ABG’s experience and innovation on your project.

This scheme is an example of implementing an idea from the Highways England "Managing Down Costs" Toolkit.

Fildrain - Highway Edge Drains

Fildrain drainage geocomposites are a cost effective alternative to traditional stone drainage for highway edge drains and concrete central reservation drainage. The geocomposite collects and channels liquids and gases to a carrier pipe for transportation to a suitable discharge point along the highway.

more...

Fildrain drainage geocompsoite for high edge drainage
 

Products

Fildrain - Highway Edge Drains

Fildrain drainage geocomposites are a cost effective alternative to traditional stone drainage for highway edge drains and concrete central reservation drainage. The geocomposite collects and channels liquids and gases to a carrier pipe for transportation to a suitable discharge point along the highway.

more...

Fildrain drainage geocompsoite for high edge drainage
 

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