Dear clients,

We would like to thank you for your business this year. It has been a pleasure helping you reach your goals, and we look forward to contributing to your success in 2020. We wish you a prosperous and happy new year!

The European Itasca team


The construction of the tunnel Kennedy in Santiago de Chile. A major challenge of an urban tunnel in Soils - Itasca Consultores S.L. (Spain)

Itasca Consultores S.L. has been collaborating with the engineering company responsible of the design (Subterra Ingeniería S.L., Madrid, Spain) in the numerical modeling aspects of the Kennedy tunnel design. It is an urban tunnel (1.2 km long) located in Santiago de Chile that was constructed between 2014 and 2017.

The most important features of the tunnel are its large dimensions (up to 20.95 m wide and 11.8 m height, with a cross-section up to 250 m2). It was excavated in the Gravas de Santiago formation, in an urban environment with covers from 10 m to 16 m.

3D models have been developed both for the 4 lanes section (Figure 1) and for the 5 lanes section (Figure 2).

1 2
Fig. 1: 3D model for the 4 lanes section

Fig. 2. 3D model for the 5 lanes section

The scope of the modelling included support analysis (with simulation of the sequential process of driving and support with setting of the shotcrete), face stability analysis (Figure 3), bearing stability analysis (Figure 4) and surface settlement analysis.

3 4
Fig 3 : Face stability analysis
Fig 4 : Bearing stability analysis

Shotcrete lining has been designed considering the effect of groundwater pressures (Figure 5) and the deformation of the seismic actions (according to the corresponding Chilean regulations for buried structures), Figure 6.

5 6
Fig 5. Effect of the groundwater rise

Fig 6. Effect of the seismic load

It is important to note that an earthquake Mw= 8.4 took placed at Coquimbo region (close to Santiago region); after the inspection of the tunnel and analysis of the monitoring data, it could be concluded that this event did not affect the tunnel integrity.

Related publication: Kuster, J. & Núñez, R. & Chávez, E. & Galera, J.M. & Santos, D.. (2019). The construction of the tunnel Lo Saldes in Santiago de Chile. A major challenge, a wide tunnel with an extremely low overburden. 10.1201/9780429424441-613.



  • Itasca International Symposium
    (17-20 Feb. 2020) - Register Now!

Registration is open to all !
Come learn how your colleagues are using numerical modeling in their work & research.

If you are not registered to our event, please do not wait! Registrations can be done via our website.



  • FLAC 8.1 is now officially released

FLAC 8.1 has officially been released in November. Are you using the current version?

If not, we invite you to discover all the new features and improvements of version 8.1.


Current Updates:






puceTraining & Seminars

Itasca will host introductory training courses in Europe:

UDEC/3DEC works on masonry analysis - Free Webinar Online March 2020 Itasca France
PFC 6.0 training course Ecully, France 2nd quarter 2020 Itasca France

Please visit for full details or contact directly the office responsible for the training.

For users who envisage the need for substantial amounts of assistance, consulting support or customized training courses are available.
Feel free to contact us if you have specific needs: we adapt our offer to your needs.


Itasca and/or representatives will be attending the following conferences:

Itasca International Symposium February 17-20, 2020 Vienna, Austria
Bergmekanikdagen March 17, 2020 Stockholm, Sweden
Slope Stability 2020 May 14-20, 2020 Perth, Australia
8th Clay Conference June 8-11, 2020 Nancy, France
JNGG 2020 June 30 - July 2, 2020 Lyon, France
16th IACMAG Torino 2020 July 1-4, 2020 Torino, Italy
AFTES 2020 September 21-23, 2020 Paris, France

puceRecent Publications

Lavoine, E., Davy, P., Darcel, C., and Le Goc, R.: On the Density Variability of Poissonian Discrete Fracture Networks, with application to power-law fracture size distributions, Adv. Geosci., 49, 77–83,, 2019.

Edelbro, C., R. Brummer, M. Pierce, D. Sandström & J. Sjöberg. (2019) "Raiseboring in difficult rock conditions", Ground Support 2019 (Sudbury, October 23–35, 2019)Paper available on-line

Perman, F., L. Jonsson, C. Andersson, M. Isaksson-Mettävainio, J. Sjöberg, U. Lindfors & M. Brantberger. (2019) "Bergmekaniska analyser för stationsutrymmen för ny tunnelbana Akalla-Barkarby", Bergmekanikdagen 2019 (Stockholm, March 19, 2019)Paper available on-line

Billaux, D., Ghazal, R., Soulat,P., Bonnet, S., Le Floch, M.: "Numerical modeling of Moreau dam stability in dynamic conditions", Colloque CFBR : « Justification des barrages : Etat de l’art et Perspectives», Chambéry, November 2019

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Itasca Consultants S.A.S
64 Chemin des mouilles
FR-69134 Ecully Cedex

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