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          Mass-Spring-System for Urban Tram Line, Bielefeld / Germany



          Bielefeld, Schwarzer Weg
          Element housing on plastic foil - rebar work going on
          Pouring concrete for the slab
          Pouring concrete for the slab
          Embedded element housing - with spring unit next to it
          Erection - Inserting the spring units
          Adjustment of the slab level during tram operation
          Bielefeld, Schwarzer Weg
          Project
          Bielefeld, Schwarzer Weg / Germany
          High-Performance floating trackbed system for an urban tram line in front of a hotel building
          Vibration Isolation System
          GERB spring elements, Type GSI
             
          Design axle load
          10 t
          Commissioning
          1995
             
          Mass-Spring-System
          Slab length: 65 m
          Vertical system natural frequency:
          5 Hz
          Number of tracks: 2
          Design tram velocity: 60 km/h
          Trackbed mass:
          1,67 t/m2
          Client
          City Bielefeld
             
          Construction Details
          Spring supported in-situ concrete slabs, arranged in a shallow concrete pit, embedded rails, asphalt top surface
          Vibration & Acoustics Consultant
          IBU Essen, Germany
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