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A Bevy of Breakthroughs: The Robbins Jobsite Roundup Featuring 6 Epic Projects

Dozens of Robbins TBMs are normally in operation at any given time in countries around the world, but this month’s breakthrough extravaganza is exceptional. No less than six breakthroughs occurred during April 2019, and more are on the way. We take a look at these epic completions in pictures below.

Galerie des Janots, France

On April 3, 2019, a Robbins 3.5 m diameter Main Beam TBM broke through into open space, completing its 2.8 km long water tunnel. It was not the first time the machine had encountered open space: twice during tunneling, the machine hit uncharted caverns, the largest of which measured a staggering 8,000 cubic meters in size.

Contractor Eiffage Civil Construction celebrates the April 3 breakthrough of the Robbins TBM in Cassis, France.

The Robbins TBM achieved rates of up to 25 m per day despite incredibly difficult geology including powdery clays and karstic limestone.

GKI, Austria

On April 8, 2019, the first of two 6.5 m diameter Robbins Double Shield TBMs completed its bore for Austria’s Gemeinschaftskraftwerk Inn (GKI) project. A second Double Shield TBM will break through later this year. The 22 km long headrace tunnel near the alpine town of Pfunds was bored under high cover (maximum of 1,200 m) in schist rock.

The first of two Robbins Double Shield TBMs, seen at launch, broke through on April 8.

DigIndy Tunnel System, USA

On April 10, 2019, a Robbins TBM completed the White River and Lower Pogues Run Tunnels, part of the DigIndy project in Indianapolis, Indiana, USA. The 36-year-old, refurbished 6.2 m diameter Robbins Main Beam machine was launched in 2013 in Indianapolis, and has done exceedingly well. Multiple world records in the 6 to 7 m diameter range were broken on the job, including “Most Feet Mined in One Day” (124.9 m), “Most Feet Mined in One Week” (515.1 m), and “Most Feet Mined in One Month” (1,754 m). Over the course of the project the TBM will bore more than 40 km of tunnels.

The Robbins Main Beam TBM completed two drives, the White River and Lower Pogues Run Tunnels, as part of the DigIndy Tunnel System.

Bheri Babai Diversion Multipurpose Project, Nepal

On April 16, 2019, the Prime Minister of Nepal and other government officials, contractor COVEC and Robbins gathered to celebrate the breakthrough of the first ever TBM in Nepal. The machine holed through months ahead of schedule after excavating in excess of 1,000 m per month.

The Robbins 5.09 m diameter Double Shield TBM bored through sandstone and mudstone, completing the 12.2 km long drive in 18 months.

Mumbai Metro Line 3, India

On April 18, 2019, the first of two 6.65 m Robbins Crossover XRE TBMs made its first intermediate breakthrough at the Mumbai Metro Line 3. The TBM completed its 1.2 km long tunnel drive from Cuffe Parade to Vidhan Bhawan station, and will now be readied for its second section on the 2.8 km lot.

Contractor Larsen & Toubro-Shanghai Tunnel Engineering Co Joint Venture (L&T-STEC JV) celebrates the breakthrough of the Crossover XRE with Robbins personnel on April 18. Video and Photos: Nagarjuna R. Musikara, Robbins Field Service.

Los Condores HEPP, Chile

On April 25, 2019, a 4.56 m Robbins Double Shield TBM completed tunneling a 12 km intake tunnel for the Los Condores HEPP in Region del Maule, Chile. Contractor Ferrovial Agroman overcame challenging mixed face conditions and high water inflows to break through into an underground chamber. A second machine—a 4.56 m  Crossover XRE TBM—will be launched to bore another section of tunnel later this year.

The Robbins Double Shield TBM, seen here during the launch, completed its 12 km intake tunnel on April 25.

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