Mexico's largest EPB supplied by Robbins - TunnelTalk
  • ALERT!
    Are you signed up to our free weekly Alert email?
    Take a moment to check and stay on top of the
    tunnelling world's news and views
Mexico's largest EPB to be supplied by Robbins Oct 2008
Desiree Willis, Technical Writer, The Robbins Company
A new 10.2m (33.5ft) diameter Robbins EPBM is planned to tunnel directly underneath urban areas for Mexico City Metro's Line 12. The machine will be the largest diameter TBM ever to bore in Mexico.
Robbins contract with the ICA Consortium (consisting of Empresas ICA, Cicsa, and Alstom SA) is for the machine, its back-up system, and cutting tools. The machine will be designed and built by Robbins in both U.S. and Chinese facilities. Launch of the EPBM is scheduled for Autumn 2009, and the new line should be operational by the end of 2011.
The machine will excavate a 6.2km (3.85 mile) tunnel between the Mexicaltzingo and Mixcoac areas in clay and sand, with boulders predicted up to 800mm (30in) in diameter. A specially designed 1,200mm (4ft) diameter two-stage, ribbon-type screw conveyor will ensure efficient removal of the large boulders.
The machine will feature active articulation for smooth driving around curves, including a tight section with a planned radius of 250m (82ft). The active articulation process will prevent deformation of the segment rings on the curved portions of tunnel.
In 2007, the Mexican Federal District announced plans to build Line 12 of the Metro entirely underground. The 24km (15 mile) line with 22 stations will serve the southern area of the city. Mexico City's metro is one of the world's largest, with more than 200km (125 miles) of rail and nearly 4 million daily passengers.
www.robbinstbm.com

     

Add your comment

Name

Date

Subject


 

TBM

Tunnel

Tunnelling

Boring

Conveyor

Cutterhead

Cut and cover

Tunnel Boring Machine

Double shield

Drill and blast

EPB

Earth Pressure Balance machine

reinforced fibre

Geotechnical engineering

EPBM

Headrace

Immersed tube

Jet-grouting

NATM

Over-excavation

One-pass lining

Pipe jacking

Road header

Rock bolt

Secondary lining

Underground

tunnel jobs

natm

tunnel excavations

tunnel boring

shaft sinking

tunnel mining

Diary Dates

Career Moves

Accolades

Procurement

Equipment Sales
Tunnel Directory
Tunnel Events
Tunnelling Events
TunnelCast
TunnelCast Videos
Tunnelling news
Tunnel Articles
World news
Used Tunnelling Equipments
TBM PLC
Tunnel News
Tunnel articles
Tunnelling articles
Tunnelling magazine
Tunnel Magazine