tunnelling-journal (1)
tunnelling-journal (1)
  • Home
  • Print
    • Subscribe
    • Tunnelling Journal
    • Canadian Tunnelling
    • Breakthrough
    • ITA Activity Report
    • A&NZ Journal
    • WTC Preview
    • Media Kit
  • Digital
    • Newsletter
    • E-Shots
    • TJ Digital edition
    • Products Page
    • Media Kit
  • Conferences
    • BTS Conference and Exhibition
    • Cutting Edge 2024
  • Buyer’s Guide
  • Events Diary
  • Jobs
  • About Us
  • Contact Us
  • Podcast

Home > Rome Metro Line B1 breakthrough

Rome Metro Line B1 breakthrough

Written by Tris Thomas on 21/09/2010 in News

Tagged:

SELI has broken through on the first of Rome Metro B1 Line’s 2.68km long twin-tubes at Piazza Bologna Station. Seli is acting as subcontractor to the JV Salini Costruttori – Tecnimont, and is constructing the twin tubes using two 6.78m diameter EPB DSU TBM. The second machine is due to breakthrough on the parallel tube in mid November.

The contract for the new Metro B1 line was awarded by the client, Roma Metropolitane to the JV, which awarded SELI the subcontract to excavate and line the two 2.68km long twin-tubes with 350mm-thick precast concrete segments in a 6+1 configuration.

The two 6.78m-diameter TBMs have been driving the tunnels from two opposite portals. The tunnelling system was engineered and designed by SELI, which also took charge of the manufacturing the auxiliary equipment including the back-up and rolling stock. The TBMs were manufactured by Herrenknecht, and the tunnel conveyor by Continental.

The two machines advanced at depths of 30m and maintained an impressive average daily output of 16.8m/d (12 rings/d) while working at 3-5 bars of EPB pressure.

The geology along the alignment was made up of loose clay and silt soil and pressuring groundwater. At times excavation proved challenging due to the complex hydrogeology of the ground, and a host of sensitive buildings above the route. The new metro line runs beneath one of the most urbanised areas of the Italian capital, with numerous historical buildings and archaeological finds in abundance.

The tunnelling crews successfully prevented surface settlements and structural damage to the historical buildings, whilst also crossing the Aniene River.

Excavation was completed as scheduled, in approximately 2.5 years.

In the coming months, SELI will also complete excavation of the new extension line between Conca D’Oro and Jonio stations using a third 9.75m diameter TBM.

Comments:

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Search

Digital Edition

More Like This

28/02/2025

Snowy 2 ‘serious safety incident’ prompts immediate review

Snowy 2 ‘serious safety incident’ prompts immediate review

Following a serious safety incident at New South Wales mega Hydro-project, Snowy 2.0, Client Snowy Hydro has released a statement…

17/04/2025

Preferred bidder for HARP project advisor role announced

Preferred bidder for HARP project advisor role announced

Following a competitive tender process, UK client, United Utilities has announced Turner & Townsend Infrastructure Limited as the preferred bidder…

23/02/2025

Tata Projects launch first TBM on Chennai Metro Phase II

Tata Projects launch first TBM on Chennai Metro Phase II

Chennai Metro Rail Limited has commenced the expansion of the Chennai city’s metro rail network as part of Phase II…

  • Contact Us
  • Media Kit
  • Magazine Archive

Newsletter

The latest from the Tunneling Journal direct to your inbox.

Social

Facebook Linkedin X-twitter Instagram
Youtube Soundcloud Linkedin Rounded Border Svgrepo Com White

Enquiries

TGS Media Ltd
The Old Library
Webster House
Dudley Road
Tunbridge Wells
TN1 1LE
United Kingdom

© Tunnelling Journal. All Rights Reserved. Privacy Policy / Terms & Conditions. Admin

We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.Ok