Track & trackside


used for a project between the UK and Japan for testing concrete sections of the Shinkansen high-speed lines under high loading regimes to examine the resilience of the concrete slab-track structures. In particular the tests will examine the behavior of the test specimens when subjected to high rates of loading (high train speeds) and vibration periods. The results will aid the development of new concrete structures and reinforcement technologies for ultra-high speed lines and allow direct comparisons between different track forms to be made. A larger version of the test rig, GRAFT III, is currently being planned to allow research into the complete dynamics of track structures at full-scale and under laboratory conditions to be simulated. Together with the experimental facility numerical modeling using both in-house and commercial software is being used to look at the likely ground movement and vibration due to ultra-high speed passage. This links in very well with the experimental programme as all numerical programmes need to be calibrated and verified to particular track and train conditions. The research is cutting-edge but is leading the way towards the goal of operating trains at 500 km/h with zero carbon emissions.


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February 2014 Page 65


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