Improving the diagnosis methodology for masonry tunnels

The sustainability of transportation systems infrastructures remains a major challenge for managers in order to ensure safety and quality service to passengers. For example, the French company RATP transports up to 10 million passengers daily in Paris. Most of its underground structures are composed...

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Published in:	Tunnelling and underground space technology Vol. 70; pp. 55 - 64
Main Authors:	Llanca, Daniel, Breul, Pierre, Bacconnet, Claude
Format:	Journal Article
Language:	English
Published:	Oxford Elsevier Ltd 01-11-2017 Elsevier BV Elsevier
Subjects:	Civil Engineering Diagnosis Engineering Sciences Géotechnique Infrastructures de transport Masonry Masonry lining Methodology Monitoring Paris metro Passenger safety Qualitative analysis Quality of service Quantitative analysis Risques Site characterization Studies Subway tunnels Transportation systems Tunnels Tunnels diagnosis Underground construction Underground structures Paris France Site characterization Masonry lining Paris metro Tunnels diagnosis
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Abstract	The sustainability of transportation systems infrastructures remains a major challenge for managers in order to ensure safety and quality service to passengers. For example, the French company RATP transports up to 10 million passengers daily in Paris. Most of its underground structures are composed of masonry tunnels built several decades ago. However, at present, monitoring methodologies often remain incomplete or qualitative when evaluating the real condition of tunnels and proposing a diagnosis. This article focuses on a new monitoring methodology that complements visual inspections, based on a quantitative analysis of each tunnel component. Using a coupled analysis of the various data (qualitative, quantitative and expert) in our possession, we suggest establishing a score to qualify the actual condition of a tunnel and improve its diagnosis. The application of this methodology to carry out an evaluation of the masonry lining of the Paris Subway System shows that the proposed method and tools are particularly well adapted for characterizing and evaluating masonry lining.
AbstractList	The sustainability of transportation systems infrastructures remains a major challenge for managers in order to ensure safety and quality service to passengers. For example, the French company RATP transports up to 10 million passengers daily in Paris. Most of its underground structures are composed of masonry tunnels built several decades ago. However, at present, monitoring methodologies often remain incomplete or qualitative when evaluating the real condition of tunnels and proposing a diagnosis. This article focuses on a new monitoring methodology that complements visual inspections, based on a quantitative analysis of each tunnel component. Using a coupled analysis of the various data (qualitative, quantitative and expert) in our possession, we suggest establishing a score to qualify the actual condition of a tunnel and improve its diagnosis. The application of this methodology to carry out an evaluation of the masonry lining of the Paris Subway System shows that the proposed method and tools are particularly well adapted for characterizing and evaluating masonry lining. The sustainability of transportation systems infrastructures remains a major challenge for managers in order to ensure safety and quality service to passengers. For example, the French company RATP transports up to 10 million passengers daily in Paris. Most of its underground structures are composed of masonry tunnels built several decades ago. However, at present, monitoring methodologies often remain incomplete or qualitative when evaluating the real condition of tunnels and proposing a diagnosis. This article focuses on a new monitoring methodology that complements visual inspections, based on a quantitative analysis of each tunnel component. Using a coupled analysis of the various data (qualitative, quantitative and expert) in our possession, we suggest establishing a score to qualify the actual condition of a tunnel and improve its diagnosis. The application of this methodology to carry out an evaluation of the masonry lining of the Paris Subway System shows that the proposed method and tools are particularly well adapted for characterizing and evaluating masonry lining.
Author	Bacconnet, Claude Llanca, Daniel Breul, Pierre
Author_xml	– sequence: 1 givenname: Daniel surname: Llanca fullname: Llanca, Daniel email: daniel.llanca@lombardi.group organization: Lombardi ingénierie SAS, 70, rue de la Villette, 69425 Lyon Cedex 03, France – sequence: 2 givenname: Pierre surname: Breul fullname: Breul, Pierre email: pierre.breul@uca.fr organization: Polytech Clermont-Ferrand – Institut Pascal UMR CNRS 6602, Université Clermont Auvergne, Campus des Cézeaux, 2 avenue Blaise Pascal – TSA 60206 CS 60026, 63178 Aubière Cedex, France – sequence: 3 givenname: Claude surname: Bacconnet fullname: Bacconnet, Claude email: claude.bacconnet@uca.fr organization: Polytech Clermont-Ferrand – Institut Pascal UMR CNRS 6602, Université Clermont Auvergne, Campus des Cézeaux, 2 avenue Blaise Pascal – TSA 60206 CS 60026, 63178 Aubière Cedex, France
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Keywords	Site characterization Masonry lining Paris metro Tunnels diagnosis
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SubjectTerms	Civil Engineering Diagnosis Engineering Sciences Géotechnique Infrastructures de transport Masonry Masonry lining Methodology Monitoring Paris metro Passenger safety Qualitative analysis Quality of service Quantitative analysis Risques Site characterization Studies Subway tunnels Transportation systems Tunnels Tunnels diagnosis Underground construction Underground structures
Title	Improving the diagnosis methodology for masonry tunnels
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