Laos

Single Shield Launched on Laotian Hydro Scheme

A 7.6 m (25.1 ft) diameter Single Shield is the first ever TBM to bore in Laos
(Photo: Robbins)

Vortext Englisch

In February 2010, contractor CMC di Ravenna oversaw the launch of the first tunnel boring machine ever to excavate in Laos. The 7.6 m (25.1 ft) diameter Robbins Single Shield TBM is digging a new hydroelectric tunnel for the Theun Hinboun Expansion Project, which will provide power to neighboring Thailand.

“We chose the Single Shield TBM based on ground conditions and the type of tunnel lining needed,” said Luca Barbàra, Far East Manager for CMC di Ravenna. The TBM has been designed to accommodate moderate squeezing ground conditions - an articulating cutterhead with overcutters makes the...

Autor Englisch überarbeitet

Issue 2011-03

Project Background Eastern areas of Indias Andhra Pradesh state receive only 20 cm of rainfall per year - an amount comparable to Africas Kalahari Desert. The Andhra Pradesh Irrigation Department...

Issue 2011-05

1 Island Pioneers The Anacaona Double Shield TBM (4.5 m diameter) (Fig. 1) started its work where Columbus first great voyage of discovery ended in 1492. On the Caribbean island of Hispaniola,...

Issue 2014-06 Turkey

Multiple fault zones, variable face conditions and squeezing ground requiring extensive bypass tunneling: These were just a few of the challenges overcome in order to successfully complete Turkeys...

Issue 2021-03

The drainage relief tunnel in Dallas, Texas, USA is an important project, as the tunnel will provide 100-year flood protection for east and southeast areas of the city--locations affected in recent...

Issue 2011-04 Russia

In early March 2011, a 6.2 m (20.3 ft) diameter Robbins Double Shield TBM crossed the finish line in Sochi, Russia. The machine completed a 4.5 km (2.8 mi) long section of tunnel that will ultimately...

tunnel 03/2010

tunnel 03/2010

Related articles: