Eva TBM started work with ceremony

https://www.agenciaelvigia.com.ar/noticias/quilmes/2020/alberto-fernandez-en-bernal-llego-la-hora-de-ocuparnos-de-los-que-mas-sufren/

Terratec company which supplied the Tunnel Boring Machines has information

http://terratec.co/NewsInfos/detail/72

TBM manufacturer Terratec announces that its EPB TBM "Eva" (what else for the Agua Sur project in Argentina) has passed the tests and completed the initial drive successfully.

In its announcement Terratec said (excerpt):

"TERRATEC is pleased to announce that the 4.66m diameter Earth Pressure Balance Tunnel Boring Machine (EPBM) named Eva is performing well. It has passed the site acceptance test and is excavating the Río Subterráneo a Lomas tunnel, in Buenos Aires, Argentina.

Italian tunnel contractor CMC di Ravenna is constructing a 13.5km-long tunnel that will carry drinking water from the newly expanded General Belgrano Water Treatment Plant, in the city of Bernal (Quilmes district), to the city of Lomas de Zamora.

In June 2020, a cutterhead lowering ceremony was held in the presence of Argentina’s President, Alberto Fernández, as well as numerous government officials and representatives from Argentina’s national water and sanitation company AySA and CMC di Ravenna.

The tunnel project is significant as it is Argentina’s largest water infrastructure project to be carried out over the last 40 years. Being the main element of the Agua Sur system. The new system will provide access to freshwater for 2.5 million inhabitants in the southern metropolitan area of Buenos Aires.

The 4.66 diameter TERRATEC EPBMs are designed to undertake the variable geology along the project alignment. The TBMs’ high-torque soft ground cutterheads feature with a spoke style design with a 49% opening ratio and cutting tools consisting of fixed and back-loading knife bits that will ensure rapid advancement and minimum interventions.

Each TBM cutter head has eight hydraulic motors with a total a power of 792 kW. The project requires the two boring machines to be launched and received from shafts. The tunnel will be mined at an average depth of 25m, using precast segments with an outer diameter of 4.4m and an inner diameter of 3.9m and continuing along an essentially straight alignment, reaching a maximum slope of +/- 0.25%. "

http://terratec.co/NewsInfos/detail/86