Rail Structural Drainage Applications

Rail construction projects require structural drainage in a number of applications. Typical applications within the rail sector include bridge abutments, buried concrete structures, retaining walls and sprayed concrete walls. ABG design, manufacture and supply proven geosynthetic solutions which provide structural drainage as well as providing significant cost savings.

Traditionally, porous blocks, drainage aggregate or no fines concrete have been used to relieve hydrostatic pressures on structures in rail developments. As a RISQS Verified supplier ABG have developed our high-performance geosynthetic drainage systems which are used in place of theses traditional solutions. ABG Deckdrain is a BBA approved, UK manufactured drainage geocomposite, which provides factory consistent drainage performance along with a range of other benefits. 

ABG Deckdrain geocomposite is a cuspated geosynthetic bonded to a filter geotextile for high flow drainage

Deckdrain drainage geocomposite provides structural drainage that is up to 50 times more effective than drainage stone at a fraction of the material and labour cost. This is achieved through the high-performance cuspated HDPE drainage core thermally bonded to geotextile filter element which acts to maintain a free-flowing drainage void. Deckdrain is light-weight yet robust drainage layer which also offers protection to the waterproofing for the lifetime of the structure.

Deckdrain is simple to install without specialist knowledge or equipment. It is supplied on easy to handle rolls making access and installation simple for areas with restricted access, such as bridge abutments, retaining walls, culverts, and cut and cover tunnels.

When compared to traditional permeable Type A filter gravel the same volume of drainage can be achieved with a significantly thinner layer. That means Deckdrain provides cost effective groundwater management for underground structures, and has uses in rail stations and tunnels where reducing the volume of dig out and import has huge finanacial benefits.

In certain applications, concrete can be cast directly into the back of Deckdrain making it ideal for an underground station slab, or to receive sprayed concrete. The unique cuspated profile of the back of Deckdrain is reported to reduce concrete rebound by up to 25%, meaning faster completion with reduced waste.

ABG Deckdrain geocomposite showing drainage filter for rail structural drainage applications

Typical Applications:

  • Rail Bridge Abutments
  • Buried Concrete Structures
  • Back of Wall Drainage
  • Station Wall Drainage
  • Retaining Walls
  • Cut and cover tunnels / green tunnels
  • Green bridges

Benefits:

  • Cost-effective alternative to granular gravel drainage
  • Horizontal or vertical drainage applications
  • Enhanced performance of waterproofing 
  • Reduced delivery traffic volumes when compared with stone delivery vehicles
  • Very fast installation
  • BBA approved

Using Deckdrain geocomposite can reduce the amount of excavation required on site and enables excavated material to be re-used as backfill. That means vastly reduced vehicle movements to and from site representing up to a 95% reduction on carbon emissions when compared to traditional methods.

ABG provide full technical support for the design of structural drainage within rail markets. Deckdrain is specified for use on rural lines, main lines and high speed rail lines as well as depot structures around the world.

Bridge abutment drainage on a rail bridge project using ABG geocompsoites

Road under rail structure utilising Deckdrain to allow more site won fill to be used

Geocomposite drainage used on a rail bridge project in the UK

Deckdrain drainage layer installed prior to bridge slide allows accelerated fill placement and reduced possession time.

Instalaltion of the drainage geocomposite for drainage on rail structural drainage projectsDeckdrain is quickly and easily installed.
Shotcrete installation onto the Deckdrain retaining wall drainage compositeShotcrete installation onto the Deckdrain retaining wall drainage composite


Back of wall drainage geosynthetics are idea for rail walls, buried structures and bridge abutments

Tunnel Drainage - Cut & Cover

ABG Deckdrain is a high performance geocomposite drainage system, providing an effective and environmentally friendly alternative to traditional granular structural drainage for railway tunnels. ABG Deckdrain has a high flow capacity and provides added protection to the external walls of the tunnel.The HDPE cuspated core of the geocomposite provides a free flowing drainage void allowing water to flow in all directions, unlike linear or pipe systems. The cuspates are designed to support the stiffened filtration geotextile which is thermally bonded to the core. This ensures that the geotextile does not deform into the drainage void under the pressure of the backfill material. More information about flow testing.

ABG Cavidrain Invert geocomposite tunnel drainage

ABG Deckdrain is durable and sufficiently robust to resist the mechanical stresses imposed during installation and then on throughout its design life. The use of ABG Deckdraineliminates the need for further protection of the waterproofing system. Deckdrain has been creep tested at compressive loads of up to 1,000 kPa to give a design life of 120 years.

Cavidrain drainage composites are used in Tunnel cut and cover projects

For cut and cover tunnels, Deckdrain can be used for the external drainage layer

For the internal and invert tunnel drainage our Cavidrain geocomposites should be considered.

Rail Structural Drainage Projects

Click to open some examples where ABG geosynthetics have been used to provide the structural drainage solution on some major rail projects:

FEATURED PROJECTS

Bridge Abutment Structural Drainage, Rosper Road Rail Bridge, Immingham

Structural Drainage, Bermondsey Rail Dive Under, Thameslink, UK

Sprayed Concrete Rail Wall Structural Drainage, Wembley, London UK

Bridge Abutment & Retaining Wall Structural Drainage, Crewe UK

Tunnel Invert Drainage, Sydney Metro, Australia

Embankment Drainage, High Speed Rail, Sevilla - Cádiz, Spain

Tunnel Invert Drainage, Black Hills Tunnels, Hong Kong

Steep Rail Cutting Erosion Control, HS1 Boxley, Kent UK

Railway Embankment Erosion Control, Kegworth, East Midlands

RISQS Certified Supplier

RISQS Verified

ABG are RISQS Verified - (Railway Industry Supplier Qualification Scheme)


Click for other applications using rail geosynthetic solutions

ABG are a market leader in the development, manufacture and technical support of high performance geosynthetics with applications across the whole spectrum of rail infrastructure.  Contact our team with your project requirements.

Deckdrain Drainage Geocomposite

ABG Deckdrain is a high performance geocomposite drainage system. Designed to provide an environmentally friendly alternative to traditional structural drainage techniques, it provides high flow capacity and added protection to waterproofing.

more...

Deckdrain drainage geocomposite from ABG Geosynthetics
 

Products

Deckdrain Drainage Geocomposite

ABG Deckdrain is a high performance geocomposite drainage system. Designed to provide an environmentally friendly alternative to traditional structural drainage techniques, it provides high flow capacity and added protection to waterproofing.

more...

Deckdrain drainage geocomposite from ABG Geosynthetics
 
 

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