The SVV 100 sand distributing and compacting machine inserts a formation protective layer and also produces the ballast formation. The machine is composed of two frame sections which are linked in articulated design.

The front section carries the drive unit as well as the drive cabin, the second frame section carries the work units and a work cabin. The four-axled powered bogie and the rear idle axle can be displaced in longitudinal direction. This produces the greatest possible construction gap during work and ensures a gentle bending line of the rails. The skeleton track is lifted from the subsoil formation, held and guided by three work units.

Lifting the skeleton track to insert rolls of geotextiles and the new formation protective layer

Before operation of the SVV 100, the old ballast and substructure material is excavated and taken away using a ballast cleaning machine (e.g. from the RM 800 / 900 series). In the first working pass the old ballast is excavated down to a depth of 30 centimetres and taken away. Ballast and excavated material can be re-conditioned in a suitable (external) recycling plant and used, for example, as base material for the formation protective layer. In the second working pass - again using the cleaning machine - a further layer is removed from the bordering soil. The depth of this layer is normally 30 to 50 cm. The skeleton track lies on the subsoil formation consolidated by the cleaning machine.

The sequence of work for the insertion of a formation protective layer begins with the smoothing and compacting of the subsoil formation. After this, the sand-gravel mixture is inserted from the material conveyor and hopper units via conveyor belts and a filling hopper and smoothed using a grading device.

A geotextile or a geosynthetic can be inserted at the same time. Vibrating plates compact the formation protective layer to the desired degree. An exact edge is produced using the shoulder consolidators. The skeleton track is laid on the finished formation protective layer. The machine is guided by a reference wire.

The subsequent placement and consolidation of ballast can also be performed using the SVV 100 sand distributing and compacting machine to produce a strong bearing ballast formation. In the same way as for the installation of a formation protective layer, the material for the SVV 100 is supplied solely in the track under repair.

• Machine for insertion of FPL after excavation of ballast
• Smoothing device for the subsoil formation
• Slewing distributor conveyor belt to insert the FPL material
• Profiling device, vibrating plates and shoulder consolidators produce the finished formation protective layer
• Also suitable for insertion of ballast

SVV 100

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