Methodology for Inspection of Reinforced Concrete Subway Tunnel

A complete evaluation of a 30 year old underground railway tunnel was made. The reinforced concrete tunnel, 12 km long, 6 m high and 10 m wide, was built in a open cut of about 10 m depth on the gravel soil of Santiago of Chile. To assess the actual condition of the tunnel, an especial methodology was developed which is the object of this paper. It includes a complete mapping of defects like cracks, efflorescence, corrosion and others. Two kind of index were designed: general indexes related to total amount of defects per unit of length, and particular indexes related to magnitude or intensity of the defect per unit of length. The methodology was very effective and its results indicated that cracks and filtration correlated well with structural typology; efflorescence correlated with gardens on top of the tunnel; and corrosion correlated with ventilation ducts, where water may flow down directly.

• Availability:
  • Find a library where document is available. Order URL: http://www.iabse.org/publications/onlineshop/index.php
• Corporate Authors:

  International Association for Bridge and Structural Engineering

  ETH-Honggerberg, Wolfgang-Pauli-Strasse 15
  Zurich 8093,   Switzerland  CH-8093
• Authors:
  • Yanez, Fernando
  • Delfin, Federico
  • Aguila, Victor
  • Torrens, Vladimir
  • Lopez, Ignacio
• Conference:
  • IABSE Symposium Weimar 2007. Improving Infrastructure Worldwide
  • Location: Weimar , Germany
  • Date: 2007-9-19 to 2007-9-21
• Publication Date: 2007

Language

• English

Media Info

• Media Type: DVD
• Edition: Volume 93
• Features: Figures; References; Tables;
• Pagination: 8p
• Monograph Title: Improving Infrastructure Worldwide. IABSE Symposium Weimar 2007

Subject/Index Terms

• TRT Terms: Concrete structures; Corrosion; Cracking; Inspection; Load factor; Reinforced concrete; Subways; Tunnels
• Geographic Terms: Chile
• Subject Areas: Bridges and other structures; Maintenance and Preservation; Railroads; I60: Maintenance;

Filing Info

• Accession Number: 01322850
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 20 2010 8:24AM