Cutting Drainage & Reinforcement

Erosaweb & Fildrain, Luton Dunstable Busway, Bedfordshire, UK

Project Information

Location:Luton to Dunstable Busway
Client:
Luton Borough Council
Consultant:BAM Nuttall
Contractor:Parsons Brinckerhoff
Products:Erosaweb Geocell GWX100/300 (5,000m2)
Fildrain 7SD/NW20XUV Geocomposite (45,000m2)
Benefits:- Steep slope stabilisation
- Sub-formation capping, drainage and reinforcement
- Large rolls for rapid installation


Project Description

Luton Dunstable Busway is a new construction connecting these two Bedfordshire towns. Much of the route will run along the line of a disused railway running parallel to the A505 and A5065. The busway comprises a twin track approximately 6 metres wide allowing vehicles to travel in both directions.

Each track consists of a 180mm high kerb on each side which the guide wheels run along, and a concrete base to support the rear wheels.

The guideway itself will have a low noise surface which, together with appropriate landscaping, noise barriers and other engineering measures, will minimise the impact on neighbouring properties.

The Challenge

The Busway is built along a disused single track rail line, much of it contained within the cutting. In order to fit the 6m wide concrete busway plus the required safe zone, without extending land take outside the existing boundary, it was necessary to steepen the slope along both sides, whilst maintaining their green finish and ensuring the stability of the slopes.

The second challenge was the drainage requirement beneath the pre-cast concrete busway, as using a layer of drainage stone would have implications on the volume of material that would need to be excavated and carried from site, as well as the cost of importing the stone to site.

The Solution

ABG’s Erosaweb geocell was chosen as three dimensional geocells are specifically designed to contain top soil within their cellular structure allowing vegetation to establish whilst providing long term erosion control along with the required aesthetic finish.

ABG Erosaweb geocell for slope reinforcement and erosion control

ABG’s Fildrain drainage geocomposite was laid horizontally beneath the concrete construction. ABG Fildrain geocomposite provided the required drainage capacity at a fraction of the depth required for stone, saving material movements to and from site.

Fildrain was delivered to site in large rolls and was quickly and easily installed without the need for specialist plant or training. Fildrain drainage geocomposite provided capping, reinforcement and drainage functions helping to achieve the load bearing capacity required in the sub-formation.

Both the Erosaweb Geocell and Fildrain geocomposite solutions enabled significant savings and reduction of the environmental impact during construction.

Erosaweb geocell panels installationErosaweb geocell panels installation
Fildrain geocomposite covered prior to installation of trunck sectionsFildrain covered prior to installation of trunck sections
Geocells filled with top soil on the embankmentsGeocells filled with top soil on the embankments
Fildrain Geocomposite drain installation.Fildrain Geocomposite drain installation.

The ABG Service

ABG provided technical advice and design assistance.

Contact ABG today to discuss your embankment drainage and slope reinforcement project specific requirements and discover how ABG’s experience and innovative products can help on your project.

Erosaweb Geocell

Erosaweb geocell is designed for the reinforcement of weak soils and has many applications including retention of soils on steep slopes and highway and rail embankments. The cells of the geocell retain the fill material, while allowing water through.

more...

Erosaweb Geocell is a cellular confinement system

Fildrain - Earthworks & Embankments

Fildrain drainage geocomposite for civil engineering earthworks and embankment consolidation. A cost-effective alternative to traditional stone drainage systems by collecting and channeling water or gases to a suitable drainage point.

more...

Fildrain drainage geocomposite for civil engineering earthworks and embankment drainage and consolidation
 

Products

Erosaweb Geocell

Erosaweb geocell is designed for the reinforcement of weak soils and has many applications including retention of soils on steep slopes and highway and rail embankments. The cells of the geocell retain the fill material, while allowing water through.

more...

Erosaweb Geocell is a cellular confinement system

Fildrain - Earthworks & Embankments

Fildrain drainage geocomposite for civil engineering earthworks and embankment consolidation. A cost-effective alternative to traditional stone drainage systems by collecting and channeling water or gases to a suitable drainage point.

more...

Fildrain drainage geocomposite for civil engineering earthworks and embankment drainage and consolidation
 

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