Geofabrics offers a range of solutions for new track construction as well as renewal or maintenance of existing railway tracks which can deliver both construction savings and life-cycle optimisation. Our solutions incorporate control of track geometry and rail alignment, stabilisation of the ballast and capping layers and complete drainage systems.
Tracktex has been created to address the extensive and expensive track and ballast deterioration problem caused by mud pumping. When installed at the ballast formation interface it prevents rain water penetrating through to the underlying deposits whilst under load, allowing a controlled upward movement of water through capillary action and also filtering and retaining any fine soil particles, in situ, during the process.
Mud pumping can result in loss of line and level and the creation of mud holes which have traditionally required extensive maintenance and monitoring to keep under control.
Tracktex is a proven mud pumping solution which has been used in Queensland, New South Wales and Victoria to deliver significant reductions in maintenance cycles on affected sections of track.
Bearing capacity of foundation material below ballast is affected by excess moisture unless effective subsurface drainage is in place. Megaflo panel drains are manufactured from HDPE and have a profile that offers a higher resistance to deformation and loss in discharge capacity required for use under rail track.
Megaflo is a proven quick response drainage solution which has been widely used across Australasia to remove water from rail track formations.
Approved by Network Rail in the UK and national rail authorities across the world, Tensar TriAx TX190L geogrid is specifically designed for use in track beds.
The unique large aperture triaxial structure of Tensar TriAx is designed specifically for track ballast stabilisation and is scientifically proven to lock ballast in place limiting lateral movement and keeping tracks aligned. This technology reduces the rate of ballast degradation and settlement to extend the track maintenance cycle.
Geoweb cellular confinement system can help create high-stiffness ballast layers by confining the ballast within the 3D structure creating a stiffened slab which increases load bearing capacity and minimises horizontal and vertical movement. The perforated structure of Geoweb allows lateral drainage of water from within the ballast.
Tensar Geogrids are used within the track substructure by improving the track Foundation through the Mechanical Stabilisation of the Capping Layer. When constructing track over soft subgrade soils having a low bearing capacity, it is necessary to improve the foundation to support the ballast effectively. Capping layers reinforced with Tensar TriAx geogrids can increase load carrying capacity and prolong service life. Using geogrids also decreases the amount of capping layer material required by up to 30%, which in turn reduces construction costs. Incorporating thick stiff geogrids means less excavation and fill material is needed.
The addition of bidim non woven geotextiles between the capping layer and the subgrade provides separation and filtration, enhancing the effectiveness of track drainage reducing the softening of the capping layer.
Geoweb cellular confinement system is a proven technology for solving challenging soil stabilisation problems common in the railroad industry. Railway engineers worldwide have successfully applied the Geoweb cellular confinement technology to provide a high-stiffness roadbed foundation at grade under track, crossings and turnouts, particularly in areas of weak soils.
The Geoweb system stabilises the capping layer, reducing vertical and lateral stresses and significantly reducing subsoil movement. This results in significant improvement in long term performance and decreases the amount of foundation material required by up to 50%.