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Concrete tunnel lining evaluation using nondestructive techniques: a multi-method case study at Eisenhower tunnel

  • An in-depth investigation of tunnel linings is performed at Eisenhower Tunnel, 60 miles west of Denver, Colorado, using a combination of four nondestructive testing methods: air- and ground-coupled ground penetrating radar (GPR), ultrasonic echo (US echo), ultrasonic tomography (UST), and impact echo (IE). A robotic frame with pneumatically operated vacuum plates is used to automate GPR, US echo, and IE. UST was performed manually. These techniques are used to identify and locate the reinforcement mesh and structural steel ribs. Local changes in ultrasonic phase are calculated by phase analysis processing techniques and apparent relationships between positive and negative phase shifts and steel and air interfaces are observed. According to previous laboratory research, these relationships indicate the bonded state between the concrete and the embedded steel, but without ground truth verification this can only be suggested. It is shown that this combination of methods can be usedAn in-depth investigation of tunnel linings is performed at Eisenhower Tunnel, 60 miles west of Denver, Colorado, using a combination of four nondestructive testing methods: air- and ground-coupled ground penetrating radar (GPR), ultrasonic echo (US echo), ultrasonic tomography (UST), and impact echo (IE). A robotic frame with pneumatically operated vacuum plates is used to automate GPR, US echo, and IE. UST was performed manually. These techniques are used to identify and locate the reinforcement mesh and structural steel ribs. Local changes in ultrasonic phase are calculated by phase analysis processing techniques and apparent relationships between positive and negative phase shifts and steel and air interfaces are observed. According to previous laboratory research, these relationships indicate the bonded state between the concrete and the embedded steel, but without ground truth verification this can only be suggested. It is shown that this combination of methods can be used synergistically to provide tunnel owners with the layout and possible condition of tunnel lining reinforcement and structural components.zeige mehrzeige weniger

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Metadaten
Autor*innen:J. White, Julia Wolf, Parisa Shokouhi, S. Hurlebaus, Andrew Wimsatt
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):TRB 92nd Annual meeting
Jahr der Erstveröffentlichung:2013
Herausgeber (Institution):Transportation Research Board (TRB) of the National Academies
Erste Seite:1
Letzte Seite:16
Freie Schlagwörter:Concrete; GPR; Impact echo; Nondestructive evaluation; Ultrasonic
Veranstaltung:TRB 92nd Annual meeting
Veranstaltungsort:Washington, D.C., USA
Beginndatum der Veranstaltung:13.01.2013
Enddatum der Veranstaltung:17.01.2013
URL:http://trid.trb.org/view.aspx?id=1242002
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Nein
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