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 > CRCHI’s first EPBM export to South America

CRCHI’s first EPBM export to South America

Written by Tris Thomas on 25/10/2023 in News

Tagged: CRCHI,Santiago Metro

On September 27th, China’s first EPBM to be exported to South America, manufactured by CRCHI, left the production line. With a total length of 105m and an excavation diameter of 9.8m, the TBM will be soon deployed on Lot 1 of the Santiago Metro Line 7 project in Chile – the first metro project in South America constructed by a Chinese company using TBM tunnelling.

CRCHI

The total length of Lot 1 of the Santiago Metro Line 7 project is approximately 7.9km, of which 6.7km will be excavated by TBM. The project under crosses the Mapocho River, to a length of 60m, with the riverbed just 10m above the tunnel crown. The tunnel mainly passes through fine-grained soil, silt, clay, sand, gravel, pumice formation, and volcanic rock formation (granodiorite). The minimum radius of the alignment is 250m, which requires a high turning capacity from the TBM.

Based on the alignment’s ground conditions, the R&D team at CRCHI has equipped the TBM with a host of independent key technologies. The cutterhead adopts a composite design of six spokes and six panels, with a central support. Disc cutters, drag bits, and gauge scrapers dress the cutterhead for the full-face excavation of the tunnel, with all detachable cutting tools replaceable from the back of the cutterhead. The cutterhead is also capable of bidirectional rotation for muck discharge. When the TBM needs to turn, the stroke difference of each group of propulsion cylinders is adjusted to meet the minimum turning demand of the alignment.

The Santiago Metro Line 7 has a total length of 26km and a construction period of six years, making it a key project for the Chilean government. The line traverses seven urban zones in the capital, with plans to build seven island style stations and construction shafts. After the completion of the project, the entire line will take just 43 minutes, which will shorten the commuting time between the two terminal stations by 54% and provide fast and convenient transportation services for over 1.36M residents.

Comments:

Leave a Reply Cancel reply

Your email address will not be published.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

  1. Jaime Ramírez Ossa says:
    06/11/2023 at 3:11 pm

    Excelente, ya se inicia en Sudamerica una nueva etapa en la Construccion de Metros subterraneo en Suramerica. Pronto Colombia debe abrir su mentalidad y en especial Medellin, con el Metro subterraneo Oriental

    Reply

Search

Digital Edition

More Like This

27/01/2025

NDA welcomes decision on plutonium disposition

NDA welcomes decision on plutonium disposition

The UK’s Department for Energy Security and Net Zero has announced that it will work with the UK’s Nuclear Decommissioning…

20/01/2025

Construction begins on Swedish Spent Fuel Repository

Construction begins on Swedish Spent Fuel Repository

Ground has been broken, starting the construction of the Swedish Spent Fuel Repository in Forsmark, Östhammar Municipality. Minister for Climate…

25/02/2025

HS2 marks milestone at Long Itchington Wood Tunnel

HS2 marks milestone at Long Itchington Wood Tunnel

The UK’s HS2 has announced a significant milestone at Long Itchington Wood Tunnel in Warwickshire – the first deep tunnel…

  • 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