Tunnelling under the Chalco Valley

A giant canal tunnel will be built using an earth pressure balance tunnelling machine in Mexico’s Chalco Valley over the next three years, following the contract being awarded early 2014.

Mexico-based infrastructure and construction company Empresas ICA has secured the $US860,000 contract from the national water commission, Conagua, to construct the General Canal Tunnel in the Chalco Valley, Mexico.

The works will be executed over three years and are an integral part of Conagua’s long-term plans to help reduce the risk of seasonal flooding within the Chalco Valley.

The tunnel will run parallel to the General Canal, from the Parada del Toro pumping station to the La Caldera pumping station.

An earth pressure balance boring machine will be used at the project for excavation.

The project will also include the fabrication and installation of the pre-cast concrete segmented lining, installation of the finish lining and covering and construction of four drop shafts at an average depth of 25 m each.

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