WP9

NeTTUN WP9 Progress1

Impact of tunnelling on surrounding structures

Period September 2012 – March 2014

WP9 Overview

There are four partners involved in the activities of WP9: Università di Roma Tor Vergata, Italy (leader); Ecole Nationale des Travaux Publics de l’Etat, Lyon, France, National Technical University Athens, Greece, and Metro C Scpa, Italy. Our Technical Advisor is prof. Richard Kastner from INSA, Lyon, France.

Our general objectives are to: (i) develop a numerical procedure to study the impact of TBM (EPB) tunnelling on existing  structures, (ii) develop a method for the early detection of over-excavation at the tunnel face, and (iii) evaluate the effectiveness of mitigation measures.  We propose to pursue these objectives using a combination of physical modelling, numerical modelling and field monitoring.

Physical modelling (ENTPE)

The four main objectives for the first 18 months of work were:

1. Review the State of the Art on the impact of tunnelling on structures (reduced scale models, field measurements);

2. Define the experimental programme;

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3. Modify the 1-g EPBS (enlarge container, improve hydraulic control);

WP9 Update1

 

 

 

 

 

 

 

 

4. Develop Finite Element models of model EPB and Line C tunnels.

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Field Monitoring (METC)

The two main objectives for the first 18 months of work were:

  1. Collect all available factual information on monument (Aurelian Wall at Porta Metronia);
  2. Collect all available factual information on experimental site (AMA site).

Knipsel

Numerical modelling (URO2/NTUA)

The four main objectives for the first 18 months of work were:

  1. Review the State of the Art on numerical procedures;
  2. Review the State of the Art on constitutive models;
  3. Develop numerical procedures for Finite Element analyses of TBM tunnelling;
  1. Develop Finite Element models of model EPB and Line C tunnels.

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Early Detection of Over-Excavation (NTUA)

The four main objectives for the first 18 months of work were:

  1. Review the State of the Art on technologies in controlling excavation face (TBM face measurements, accuracies, TBM performance);
  2. Review measurements (face pressure, excavated volume, over excavation, surface settlements/damage);
  3. Method development.

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WP9 team

URO2: Giulia Viggiani (WP leader), Luigi Callisto, Nunzio Losacco, Sebastiano Rampello, Laura Restaino;

ENTPE: Denis Branque, Henri Wong, Justin Bel;

NTUA: Michael Kavvadas, Philippos Chortis, Dimitrios Litsas, Panagiotis Sitarenios, Konstantinos Tzivakos;

METC: Nicoletta Miniero, Grazia Di Mucci, Eliano Romani.

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