High-Speed GPR to Manage Trackbed Assets and Renewal Strategies

The ability to record high-speed GPR data on a repeatable basis offers a permanent-way engineer numerous benefits, including optimised targeting and scoping of site investigations, better planning of ballast-maintenance activities, more accurate scoping of formation-renewals works, optimising ballast cleaning activities, renewals quality-control and auditing, and monitoring ballast deterioration rates for improved forward planning.

This paper outlines recent advances in the acquisition, processing and interpretation of GPR data in relation to a high-speed train-mounted multiple-antenna GPR system for non-destructive assessment of the railway trackbed. These developments are discussed in the context of new tools for permanent-way engineers to manage assets and renewals strategies.

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