Abstract
The railway system in Poland is undergoing technological transformation. The development of the Polish railway system concerns not only high-speed trains but also infrastructure. The steel bridge is the most popular type of railway bridge in Poland. Most of them were built in the 1950s and 1960s. According to the recommendations in place in Western Europe, such railway bridges should be reviewed in terms of their fitness for use with modern high-speed trains. The modern technological revolution affects not only the railway, but also developments in displacement and deformation measurement techniques. New technologies provide more objective measurement results and accelerate results processing. They also facilitate the non-contact measurement of bridge structure stability. The authors investigated the vertical displacement of an old steel railway bridge in three different, specific case studies of terrestrial laser scanning data application. Then, the results of 3D data were compared with traditional land surveying results. The scientific results led to a conclusion that a strictly determined methodology of the measurement and analysis of a terrestrial laser scanner results supported by traditional land surveying techniques facilitates the determination of the vertical displacement of bridges with acceptable accuracy.
Highlights
Bridge infrastructure is a foundation of the land transport system
The endeavor to determine the methodology for the stability testing of bridges using Terrestrial laser scanner (TLS) necessitated epochal measurements of an object that was in a static condition during the measurements
The research object was defined, the same variants of object monitoring were set during subsequent periodic measurements, measurement methods and measurement technologies were set that would be sufficiently accurate, and a research schedule was set to ensure timely periodic measurements
Summary
Bridge infrastructure is a foundation of the land transport system. Its importance for road engineering poses strict requirements for reliable and fault-free use. The matter of trouble-free maintenance of bridges is an important issue from the point of view of the functionality of the object, which affects the economy directly, and for financial reasons related to high costs of construction, upgrading, and potential decommissioning of the structures. Apart from the economic and financial factors, good repair of bridges contributes to the preservation of the regional historical and landscape heritage. The diversity of causes of the correct use often results in the “stimulation (extension) of the service life” of bridges [1]. The ground rule for sustainable operation should be periodic diagnostics of stability
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