Open

Product by Category > Geotextiles > TERRAM Hydrotex®


GEOTEXTILE FILTER SEPARATOR – RAIL TRACKBED APPLICATIONS

 

General Information

TERRAM Hydrotex® provides a permanent way and high speed solution for trackbed stability that not only acts as a filter/separator for fine soils, but also removes the requirement for a sand blanket or filter medium.

Product Information 

TERRAM Hydrotex® is a nonwoven geocomposite consisting of a central filter media thermally bonded to two opposing needle punched nonwovens Robust Geotextile filter layers, to create a geocomposite with sufficient strength and protection to be durable to the abrasion and point loading of ballast. After 10 years of research and development, this new cost saving technology has now become available globally.

Application 

The traditional use of a sand blanket in railway trackbed uses a sub-ballast and/or a graded-sand layer to prevent the upward movement of fine sub-grade particles, while allowing effective drainage and dissipation of pore water pressure. TERRAM Hydrotex® offers this solution in one geocomposite.

Benefits: 

TERRAM Hydrotex® is strong but flexible allowing the composite to conform to the excavated formation, so that no voids exist below the filter media for the development of pockets of slurry resulting in an unstable trackbed.

TERRAM Hydrotex® provides true valued engineering. It enables the trackbed to be installed up to 4 x quicker than the standard practice of using sand or sub-ballest.

It also reduces costs to both the client and the contractor, reducing material costs, and enabling the track to be handed back 4 times quicker.

Features: 

  • Prevents upwards particle passage smaller than 0.001mm
  • Permeable filter, allowing upward and downward water transmission
  • Replaces the requirement for a sand blanket or filter medium
  • Quickly and easily installed, no specialist plant is required
  • Functions under ballast without any reduction in performance
  • Approved by Network Rail, SNCP and ProRail
  • Residual slurry becomes desiccated as any pore water is dissipated
  • Supplied on standard rolls of 3.9m x 25m (other sizes available on request)

Environmental Benefits 

TERRAM Hydrotex® composite reduces the depth of excavation that would be required with a sand blanket. The result is a decrease in the amount of spoil being taken away for landfill and a reduction of vehicles required to deliver materials.



Case Study

TERRAM HYDROTEX® at Ardglen NSW

Project Details: Routine Corrective and Reactive Maintenance (RCRM) Location: Ardglen NSW Overview Completed in 1877 the Ardglen Tunnel is the oldest single line tunnel still in use.  Located at the summit of a ridge with steep grades in each direction the heritage listed brick lined tunnel is not only historically significant but also presents challenges […]

View More Case Studies


Latest Posts

May 10th, 2024

Geosynthetics in Railways

Right across the world, geosynthetics are used to aid in not only the construction of railways but more importantly, to prolong the life of the track and reduce the need for maintenance. Some of...

Read More
March 14th, 2024

Sustainable engineering solutions for natural disaster rehabilitation, recovery and resilience – Part 2

Review of Part 1: The Engineering solutions for natural disasters include: (1) sustainable engineering solutions for quick and economical yet technical and durable rehabilitation and repair of...

Read More
February 22nd, 2024

An Effective and Economic Solution to Ground Improvement

Poor ground usually has characteristics such as high-water content, low strength, easy compression and deformation, and is significantly affected by earthquakes. Therefore, it is necessary to truly...

Read More
February 16th, 2024

Sustainable engineering solutions for natural disaster rehabilitation, recovery and resilience – Part 1

Introduction The Engineering solutions for natural disasters include: (1) sustainable engineering solutions for quick and economical yet technical and durable rehabilitation and repair of the...

Read More


If you would like further information
about any of our products please

Contact Us
Contact Us