THE MITIGATION OF STRUCTURE-BORNE NOISE ON A STEEL RAILWAY BRIDGE USING A POLYURETHANE RESILIENT TRACK ISOLATION SYSTEM

Docklands Light Railway (DLR) has a policy of monitoring environmental noise from its trains and implementing mitigation measures: adherence to this policy is set by an Act of Parliament. Limehouse Cut Bridge, a 28 m span composite steel and concrete bridge, had been emitting noise originating from structure borne vibration from the passage of trains and this was intruding on neighbouring properties. This paper describes the implementation of an effective noise control solution and subsequent project evaluation. A track isolation system was proposed and predictions made of the achievable noise mitigation utilising material performance parameters developed from computer modelling of the frequency response of the bridge. A proprietary elastomeric polyurethane rail baseplate grout was chosen which satisfied both the dynamic performance criteria and trackwork constraints. Construction involved installation during railway possessions, necessitating risk analysis and contingency planning to ensure timely completion. Subsequent agreement between the measured and predicted performance of the isolation system indicated achievement of the technical objectives set. (A) For the covering abstract see IRRD 882313.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 810-17

Subject/Index Terms

Filing Info

  • Accession Number: 00729518
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-419-21210-8
  • Files: ITRD
  • Created Date: Dec 26 1996 12:00AM