The proper fabrication of concrete-embedded tracks is a prerequisite for their long-term durability and their economic efficiency. Frequent defects which are caused either during fabrication or during operation are (partially) debonding between the pre-fabricated sleepers and the site-mixed concrete. This paper deals with the Pulse-ESPI-Technique as a measuring method which enables to detect these defects as well as further imperfections within the base plate. The investigation demonstrate that the ESPI techniques is very useful for the non destructive inspection of reinforced concrete structures. The measurements of a road bed segment of the Reha 200 type allow the detection of defects within the interconnection joints and could easily be distinguished from fully coupled concrete sleepers. Furthermore cracks in the local concrete could be detected as well. Further investigations will cover dedicated excitation measures and defect criteria for rigid road beds. The goal is the development of a mobile unit fort he in-situ inspection of rigid road beds. Further application areas might include the inspection of concrete bridges as well.
Optical inspection techniques for vibration analysis and defect indication in railway
Optisches Prüfverfahren zur Schwingungsanalyse und zum Fehlernachweis an Eisenbahngleisen
2004
8 Seiten, 8 Bilder, 1 Tabelle, 8 Quellen
(Nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
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