Paving underground

A Power Curbers 5700C machine is being used underground in Turkey to slipform the U-shaped concrete platforms on the walls of a new tunnel project.
February 14, 2012 Read time: 1 min
A 307 Power Curbers 5700C machine is being used underground in Turkey to slipform the U-shaped concrete platforms on the walls of a new tunnel project. These will house electrical conduit and serve as maintenance walkways when the tunnel is in operation.

This machine is working on a railway tunnel that forms part of a new link in Turkey's commercial centre Istanbul. This link is intended to reduce chronic traffic congestion that occurs particularly at peak periods on the crowded D100 highway that runs East-West on the Asian side of the city. The machine is working around 45m underground and has been fitted with a special 4.5tonne mould designed for this job. The job is challenging in several ways and aside from having to deliver concrete through chutes placed into the tunnel every few kilometres, securing the concrete to tunnel walls that vary in diameter has presented a real challenge. The tunnel walls are wider at train stations and then become narrower again, so Power Curbers designed a mould that can be varied hydraulically in both height and width.
Concrete milling, paving & compaction Road Structures

For more information on companies in this article

Related Content

  • What lies beneath Down Under
    January 11, 2021
    The third and final construction stage on Sydney’s WestConnex project has begun, including the underground Rozelle Interchange – with a lot of help from Komatsu
    Read More
  • Tunnel project of Chilean capital Santiago
    April 8, 2015
    Tunnel construction in Chilean capital Santiago will help cut chronic congestion – Mauro Nogarin & Mike Woof write. Chile’s capital Santiago is a thriving city having benefited from the country’s economy growing strongly in recent years. The massive copper mining sector has helped boost the country’s GDP significantly in the past few decades, also aided by the growing international reputation of Chile’s large wine industry. The steady economic growth has resulted in an equally steady growth in average incom
    Read More
  • Mumbai’s new coastal transport link
    July 6, 2022
    Mumbai’s new coastal road presents an ambitious and challenging project that will help improve the lives of the city’s inhabitants - Mike Woof writes
    Read More
  • Bertha ends her Alaskan Way voyage in Seattle
    December 21, 2017
    Seattle's State Route 99 viaduct is coming down. David Arminas was on site. Bertha, the world’s largest diameter earth pressure balance tunnel boring machine, with a cutterhead diameter of 17.5m, is no more. Her 2.7km journey underneath the waterfront area of Seattle finished on April 4 and the power went off for the last time on an extraordinary TBM that had finally completed an extraordinary job. “A small sidewalk job would have had more impact on city traffic than we have had,” says Brian Russell a v
    Read More

Highlighted Content