The Roads and Transport Authority (RTA) in Dubai has announced the completion of key tunnelling works of Route 2020 Project stretching 3.2km at a depth ranging from 12 to 36 metres
Mattar Al Tayer, director-general and chairman of the board of executive directors of the RTA, said, ?The tunnel-drilling works commenced last October as the giant tunnel boring machine ? ?Al Wugeisha Expo 2020 ? started off Discovery Gardens and reached the underground station nearby Jumeirah Golf Estates, last February. The drilling works then continued past the Dubai Investment Park, and up to the final point at the Green Community.?
Al Wugesha can crush stones and penetrate through sandy layers or any other soil components encountered during the drilling process.
?It has a huge metal gear supported by an automated tail and a cutting wheel with a cavity the shape of which varies according to the type of drilling and soil layers. At the back of the cavity, there are hydraulic levers to support the propulsion of the drilling part to the front during the drilling process. It is also fitted with a machine for removing the soil, tubes for discharging the mud, and a control room in addition to other hi-tech components and features to accelerate the drilling process. The single concrete ring has six to seven moulds, each ring measures about 1.5 metres in diameter.
?Al Wugesha is also environment-friendly and has no negative effects on land layers nearby the drilling area. Moreover, the tunnels it produces have symmetrical dimensions, which facilitate construction works and reduces the expenses of tunnel wall installation,? he added.
Works in the metro viaducts are set for completion in November this year, and all railway works of the project will be accomplished in July 2019. The trial run of the metro will start in February 2020.