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.…
Autor*innen: | J. White, Julia Wolf, Parisa Shokouhi, S. Hurlebaus, Andrew Wimsatt |
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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 |