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Search our list of case studies to get background information on past and present projects.
Search our list of case studies to get background information on past and present projects.
| Mexico City, Mexico
In an urgent effort to prevent flooding in the urban capital of Mexico City, the National Water Commission (CONAGUA) has ordered the construction of a 62 km (39 mi) long wastewater line, Emisor Oriente, which is expected to help increase Mexico City’s wastewater capacity and ease some of the city’s related problems. Torrential rains and continuing floods in Mexico’s capital during the rainy season have increased the urgency of the job, quickly making it the country’s most critical infrastructure project.
| Lorain, Ohio, USA
In 2000, the Ohio EPA ordered the City of Lorain to address overflows that violated the City’s National Pollutant Discharge Elimination System (NPDES) permit. The mammoth 7.0 m (23 ft) diameter Double Shield machine was built using Onsite First Time Assembly (OFTA)--a Robbins-developed method that saves contractors in shipping time, costs, and man-hours worked.
| Ankara Province, Turkey
Driven through a mountainside with 600 m (1,968 ft) of cover in Central Turkey, the Kargi Kizilirmak Hydroelectric Project is one of the most challenging tunneling projects ever completed in the region. The extremely challenging ground conditions of this project made it necessary for the machine to be modified in-tunnel. The results of which largely contributed to the creation of the Crossover machines used today.
| Mexico City, Mexico
A Robbins Crossover (XRE) TBM was chosen to bore a 5.8 km (3.6 mi) tunnel as part of Mexico City’s wastewater management efforts, making it the first Crossover machine to bore in North America. The machine achieved two national records for TBM advance—one for excavating 57 m (187 ft) in one day and another for boring 702.2 m (2,303.8 ft) in one month.
| Gaziantep Province, Turkey
The Bahce-Nurdag Railway Tunnel will consist of two parallel 10.1 km (6.3 mi) tunnels, excavated by both drill and blast (2.9 km/1.8 mi) and TBM (7.2 km/4.5 mi). A unique Single Shield machine sealable to high water pressures is excavating in exceedingly hard rock conditions.
| Newburgh, New York, USA
A single shield hard rock TBM is set to bore in New York State where it will encounter water inflows with high volume and pressures up to 20 bar. The machine will bore a bypass tunnel below the Hudson River to repair the Delaware Aqueduct--the world's longest continuous tunnel.
| Shanxi Province, China
China's Great Hydro Network (GHN) is a mind-boggling feat of human engineering in the making. The network of tunnels will source water from the Yellow River to benefit up to 24 million people in the drought-ridden region. Once complete the tunnels will supply 2.3 billion cubic meters of water per year, improving both capacity and reliability of water supply.
| Moscow, Russia
With a growing population of nearly 12 million, the Moscow Government has issued an extensive city-wide metro project, totaling 50 km (31 mi) of new track by 2018. A total of five Robbins EPBs have bored multiple tunnel drives on the Moscow Metro. Combined, the EPBs have bored more than 8km of tunnel.
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