COMMENTS 5 Aidan Turnbull Editor


December 2018. The mega tunnel project will offer a long-term solution for rainwater drainage for 100 years to come in Al Maktoum Airport area, the Expo 2020 area and the nearby urban complexes. Developed in Guangzhou, China, two tunnel excavating


T


machines are expected to arrive in central Dubai in October 2018. The project will be covering an area of 490 square kilometres, which is almost 40% of the entire urban area of Dubai. Launched in October 2017, the project is projected to finish by September 2020, just before the Emirate hosts the World Expo 2020. This new tunnel has been designed to deal with both


rainwater and groundwater, and will drain almost 40% of the core of Dubai, including the flagship project Dubai South, with Al Maktoum International Airport, the Expo 2020 site and several other emerging developments - which also require power sup- plies while the tunnel project proceeds. Power requirements for this type of tunneling are generally


less than other mechanised tunneling methods and typically include lighting, ventilation, compressed air supply, pumping to remove water, and general electrical support services. Dubai Electricity and Water Authority (DEWA) estimates that


a maximum power requirement of approximately 375 kW will be needed during the initial portal and starter tunnel development phases. For the excavation phase a 3,800 peak horsepower Tunnel Boring Machine (TBM) - this uses about 3,000 kW - will


Middle East Power


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Middle East Power September 2018


More power needed: Dubai’s mega tunnel works begin in December 2018


he Dubai Municipality has revealed its excavation plans for the Deep Tunnel Storm Water System which will serve the Airport City-Expo 2020 begining in


be required. The TBM trailing gear will require about another 600 peak horsepower (448 kW). The primary and booster stations in the two tunnels will


require approximately 600 kW each. The total power requirement for each TBM is estimated to be around 5,200 kW, which represents a power drop of approximately 6,500 kVA. TBM 1 will begin its drilling work from the starting of the seventh intersection on Shaikh Zayed Road for a distance of 2.4km towards the sea up to the location of the main pumping station. It will then be dismantled and reassembled to move from the seventh intersection until the eighth intersection, 1.7km away. In parallel, the second TBM drilling machine will start work


from the Expo intersection on Jebel Ali-Al Lehbab Street for a distance of 5km and will continue until the eighth intersection on Shaikh Zayed Road in Dubai. However you look at it, Dubai faces some boring times ahead.


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