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Region’s Largest Drilling Machine For Dubai Drainage Project Getting Ready In Guangzhou
Faizan Hashmi Published July 17, 2018 | 02:45 PM
DUBAI, (UrduPoint / Pakistan Point News / WAM - 17th Jul, 2018) A delegation from Dubai Municipality headed by its Director-General, Dawood Al Hajiri visited the Chinese city of Guangzhou to learn about the stages of manufacturing of the digging machine, to be used for the Deep Tunnel Storm Water System project for Airport City-Expo 2020, which is one of the most vital and strategic projects in the Emirate of Dubai.
The drilling machine is expected to arrive at the site in October 2018. The excavation will begin in December. The project will be covering an area of 490 square km, which is almost 40 percent of the entire urban area of Dubai.
Al Hajiri and the accompanying delegation reviewed the quality standards in the factory in Guangzhou and the production efficiency procedures as well as the technical specifications that characterise the drilling machines.
The project was launched in October last year and is due to be completed by September 2020, as Dubai Municipality is racing to complete the project before the 2020 World Expo.
Dubai will be purchasing two large TBM machines for drilling deep tunnels for the project. These machines will be the largest in the region used for digging tunnels that will be used for the purpose of transporting storm water.
Al Hajiri indicated that TBM 1 will begin its drilling work from the starting of the seventh intersection on Sheikh Zayed Road for a distance of 2.
4 km towards the sea up to the location of the main pumping station, then be dismantled and reassembled to move from the seventh intersection until the eighth intersection along 1.7 km.
In parallel, the second TBM drilling machine will start work from the Expo intersection on Jebel Ali - Al Habab Street for a distance of 5 km and will continue until the eighth intersection on Sheikh Zayed Road, he said.
Al Hajiri added that manufacturing and installation of one device will take 364,000 man-hours, noting that the daily energy consumption of the first device will be 64 MW taking the total consumption in 12 months to approximately 20,156 MWh. The second device will have a daily electricity consumption of 58.738 MW taking the total consumption in 14 months to 21,380 MWh.
He pointed out that the finished internal diameter of the tunnel will be ten metres and that the cutting diameter of one TBM machine will be 11.05 metres and the average daily drilling will be 19 metres per TBM.
"The drilling will be done in two types of soil; the weak rocky soil and clay soil with an average depth of 42 meters. The tunnel with a diameter of 10 metres will consist of eight concrete segments per ring, each 35 cm thick. There will be two segment types – 1.6m and 2m wide and each piece will be weighing seven tons. These pieces will be fixed by iron pegs and sealed with epoxy," said Al Hajiri.
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