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Elastic rail pad components

Modern track bed structures need to be elastic to minimise the forces applied to supports as trains pass over them.

In ballastless track, highly elastic elastomer components in the fastening system absorb such loads. In the case of ballast beds, rail pads are used to greatly reduce high-frequency vibrations which are channelled into the ballast bed via the rails, thus preventing the ballast from being shattered. Modern rail fastening systems with elastic base plate pads allow rails to countersink while making use of the load-transferring effect in rails and dispersing any vertical forces that arise to an optimum extent. The elasticity in micro-cellular foam rail pads by Calenberg engineers can be optimally adjusted to live loads as per clients' specific requirements. The loads and forces exerted are deflected into the volume-compressible, micro-cellular structure in the base plate pads, guaranteeing an exceptional service life thanks to the chemical structure of the selected highly elastic EPDM rubber mixture.

These highly elastic components also provide insulation against vibrations and structure-borne sound produced by irregularities in the wheels and tracks, ensuring vibrations are not transmitted into the ground or only to a minimum extent and thus have little or no effect on secondary air-borne sound in the adjacent buildings.

The result is high travelling comfort, a longer service life for elastic components in the track system, and protection for bed structures and the surrounding area, thus ensuring peace and quiet are included into the the bargain.

Elastic base plate pads - Ciplacell

Highly elastic base plate pads provide the elasticity required in ballastless track systems, fitted in situ between the ribbed base plates and the supporting concrete slab (spring rigidity c = 5 – 60 kN/mm). This ensures a load-spreading effect in the rails, thus reducing any vibrations and structure-borne sound.

Elastic rail pads - Civicell

Elastic rail pads are installed directly beneath the rail base to protect the track bed structure and increase elasticity in ballast beds. Thanks to their micro-cellular structure (c = 20-200 kN/mm), elastic EPDM rail pads can be manufactured in a wide variety of designs for different rigidities as per client requirements for varied applications, ranging from metros and tramways through to high-speed traffic.

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