Trackelast® for tram tracks on Carolabridge in Dresden

Sharing and utilizing our expertise in the field of track elasticity makes our heart beat faster!

A good example of this is the recent rehabilitation of the tram tracks on the reinforced concrete ‘Carola bridge‘ in Dresden, Germany. For this project, we engineered and installed 1.700 project specific edilon)(sedra Trackelast® BPP/RPU/6000 baseplate pads (colored orange on the photos below).

A sustainable advantage was the reuse of the existing individual supporting points of the tracks.

Prior to the rehabilitation works, our technical specialists together with specialists of DVB and HTW Dresden executed field and material tests to define the optimum static and dynamic point stiffness.

The pads ensure optimal damping of the vibrations of the trams driving over the bridge without endangering the track stability. A good investment as the solution provides an extension of the service life of the existing tracks and contributes to the preservation of the bridge structure!




Installation Corkelast® EBS for Warsaw M2 at full speed!

After a period of preparatory work, our contracting partner Gülermak has started the installation of the edilon)(sedra Corkelast® Embedded Block System (EBS) for the 2nd extension of Warsaw Metro Line 2. The first EBS units are in situ installed in the slab track!

The total project includes 20 km of EBS single track, including 8 stations and a technical depot. The newly built metro tunnels will run directly under densely inhabited areas. For this reason, the investor Warsaw Metro set strict requirements for durability and vibration
control. The contract includes edilon)(sedra Trackelast® vibration damping PU-mats for the most sensitive noise and vibration mitigation areas and 41 EBS switches and crossings.

Online EBS installation training

Recently, as part of the Warsaw Metro Line 2 project, our Track Services department gave an online EBS installation training to the responsible track construction companies. During the training working methods and various challenges were discussed, such as:

– How to level and align EBS on our Trackelast® STM (Slab Track Mats)
– How to realise and secure an accurate track position and gauge with EBS alignment portals
– How to pour in situ concrete under and around the aligned EBS trays

Clear working methods are important to ensure safer, faster, more accurate and easier track construction. These training offerings are an important part of our full-service project support: from the very early track design phase to the supply and construction of our track systems.

EBA approval solid structure bridges

We are delighted to announce that The German Federal Railway Authority (EBA) granted edilon)(sedra GmbH Munich approval for the ERS-HR rail fastening on solid bridges.

This continuously elastic rail fastening system, which has been successful throughout Europe for over 40 years, is now also available in Germany up to a maximum speed of 160 km/h.

Reduction of construction height
The main field of application are short (semi-)framed structures up to approx. 25 m length with minimum construction height and demanding acoustic requirements. For this purpose, steel troughs will be integrated into the concrete slab, thus achieving a reduction in construction height of up to 70 cm. The embedding of the rails in a continuously supported elastic polymer is optimal in reducing acoustical emissions and thus is capable of reducing secondary noise emissions.

This was preceded by almost 10 years of operational testing on regional lines as well as on lines of the long-distance and conurbation network.

Technical support
The ERS fastening system is based on the Corkelast® LCS level crossing technology, which has already been successfully used for over 20 years in the network of Deutsche Bahn.

For more information please consult our technical ERS-HR bridge specialists. They are eager to answer your questions and offer you technical support!



Newhaven: level crossing replacement in high risk rail-road area

edilon)(sedra have been awarded the contract to supply and replace an existing level crossing with a 48 m twin track level crossing at the docks in Newhaven, UK. The location of the crossing is considered a high risk rail-road area.

The secondary line level crossing in Newhaven docks is used by DMU passenger and freight aggregate traffic. The crossing is the only access to the large bulk handling area of the town’s docks. These docks have a very high volume of bulk aggregate materials arriving by ship with the majority leaving via the level crossing. The combination of the heavy loads, poor soil, poor drainage and nonperpendicular angle of the crossing to the road causes the road profile to deform into a high risk condition for road users. Complaints to the council on safety issues are a common occurrence.

The current level crossing is based on rubber panels and the substructure below is saturated marine alluvium with no identifiable drainage. The crossing is approximately 4 years old and unable to maintain its road profile. The angle of the level crossing is non-perpendicular to the road crossing. This generates damaging oscillating forces when the multiple axle road vehicles traverse the rubber units. During discussions between track owner NWR Sussex and edilon)(sedra it was agreed that the only viable, low risk and cost effective solution was to apply the pre-cast level crossing system Corkelast® LCS-350. The system is a development variation of the existing Harmelen crossing which is already approved by NWR.

Current rubber panel level crossing at the Newhaven docks

In this harsh environment, the proven advantages of Corkelast® LCS-350 were a defining factor in NWR opting for the system:

  • Poor ground conditions – Able to spread load over a large surface area decreasing the ground pressure to a minimum.
  • Fluid ground conditions – As the ballasted track has been removed and the system no longer requires tamping, the ground is, in all essence, sealed under the slabs creating a stable integrated platform which reduces the possibility of water “pumping”.
  • Damaging forces from road traffic – The use of larger heavy slabs makes the system more stable so the forces are dissipated before the effect can cause any damage.
  • Water causing corrosion – The rail is chemically bonded to the concrete and therefore protected against corrosion. No more steel fastenings are used that would suffer from accelerated corrosion due to the ever present water.
  • The rail is continually supported, which reduces the peak loading associated with a traditional sleeper track design during both train and road traffic.
  • A reduced risk to cyclists and pedestrians due to the smooth integration of the slabs with the road surface.
  • Asset life of 40 years and minimal maintenance interventions.

Drawing of the Newhaven project, showing the Corkelast® LCS-350 level crossings