tracktex-transp-logo-edited
Revolutionary
Stop Mud Pumping

The rail industry has long recognised the challenges presented by mud pumping and how to manage it. Left untreated it can result in track geometry problems, higher frequency maintenance requirements, and permanent speed restrictions (slow orders) being imposed.

What causes Mud-Pumping

Mud pumping, also known as subgrade pumping, has always been a problem in ballasted railroad trackbed, particularly in sections built on weakly cemented mudstones or over consolidated clays. These soils have a high shear strength and as such do not need a deep trackbed to support track loading, yet if unprotected the upper surface degrades easily when exposed directly to water. As water percolates through the ballast to the upper surface of the subgrade it will mix with particles at the surface to form a highly mobile slurry.

Quality Services and Support

The open texture of ballast allows free water to come into contact with the exposed formation. When the exposed surface contains fine grained particles, these can be readily eroded by the water accumulating in the voids, forming weak, highly mobile slurry. This slurry is then ‘pumped’ up into the overlying ballast by each passing axle load. Contamination of the clean ballast layer by the fine soil particles in the slurry very quickly reduces the load-bearing properties of the ballast and leads to loss of track alignment in the affected area.

Mud pumping results in ballast failure, that weakens the track modulus, and consequentially reduces the bearing capacity. Under extreme conditions the ballast will become unmaintainable within a very short time post-installation.

A small amount of slurry can considerably reduce ballast life.

Preventing Mud Pumping, Ensuring Track Stability

Comprehensive Services for Track Stability and Performance

At TrackTex, we offer a range of services designed to address the challenges of mud pumping and ensure the stability and performance of your tracks. Our team of experts utilizes advanced techniques and technologies to deliver effective solutions tailored to your specific

Professional Development Hours

GEOfabrics continuing education sessions provide technical training on specifying and using TrackTex. These sessions contribute to PDH hours.

Trackbed Stabilization

Geosynthetics are widely used as a way to improve ballast performance under railways. GEOFabrics RK4 is a geocomposite comprising a stabilizing geogrid bonded to our RK1 needlepunched non-woven sep...

Symptoms of Mud Pumping

The symptoms of Mud Pumping are similar to those of life expired ballast, i.e. wet spots appearing at the surface of the ballast accompanied by rapid deteriorating of track geometry. However, from ...
Discover Our Services Today
Contact us for more information and assistance.
Latest

Discover Our Case Studies

Explore our latest case studies showcasing our expertise.

Diamond Crossing Replacement with TrackTex

In Detroit Lakes, MN, a frequently trafficked diamond crossing operated by Canadian Pacific and BNSF had experienced frequent fouling because of mud-pumping. Mud pumping results in ballast failure,...

Coos Bay Line Tunnel 21 Rehabilitation

The Coos Bay Rail Line is owned and operated by the Port of Coos Bay. It spans 134 miles from Coquille Oregon to Eugene Oregon, providing connections to the North American rail network for manufact...

Crossing Repair and Replacement using TrackTex

This road crossing had been replaced and repaired multiple times due to issues with track geometry movement and differential settlement of the highway and railroad. Union Pacific Engineers assessed...