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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