Beijing time, December 6th, 21:00.，Istanbul, TurkeySarlyer-KilyosExpressway Tunnel Project Site，With the Turkish Minister of Transport and Infrastructure, Abdul Kadir,·Uraloglu（Abdulkadir Uraloğlu）Give the order，China Railway Equipment Development“China Railway 1294”The cutter head of the EPB shield machine rotates slowly，MarkedChina's Largest Diameter Shield Machine Exported OverseasSmooth start，Officially open the projectThe most complicated、The most critical sectionThe task of tunneling。This is not only China's high-end equipment manufacturing.“Walk out”Another milestone.，It is also a co-construction“The Belt and Road”Important Practice of Deepening Cooperation between China and Turkey under the Initiative。

Sariyer-KilyosThe total length of the expressway tunnel is about 7 kilometers.，Double-hole single-line，During the construction, the traditional drilling and blasting method and shield method will be used to complete the excavation.。Among，“China Railway 1294”Tunneling interval is 8.Seven kilometers，The maximum buried depth is 172 meters.，Minimum horizontal curve radius 190m。

China Railway Equipment Design Team aims at large burial depth of the project、High water pressure、Complicated construction conditions such as installation in the tunnel，And the special needs of the customer，A super-large diameter EPB shield machine is developed.“China Railway 1294”，Diameter of cutter head of complete machine 13.65 meters，The chief pilot is about 95 meters.，The total weight is about 2850 tons，It also carries many advanced technologies such as continuous tunneling for the equipment.，The high efficiency of construction is ensured.、Safety and environmental protection，The problem of large diameter shield tunneling under complex geological conditions has been successfully solved.。

Ulaloglu pointed out at the launching ceremony.，This is the first tunnel boring machine used by the General Directorate of Roads in Turkey.（TBM）Highway projects under construction，It is also the third largest shield machine in Turkey so far.，Smooth start of the project，It is of great significance to Istanbul's transportation network and social and economic development.。

It is reported thatSariyer-KilyosThe motorway is one of the most important road projects under construction in Istanbul，Faster access to the city centre from northern Istanbul neighbourhoods will be provided。After completion，Residents in the north will be able to bypass the urban development highway.，ToSariyerThe travel time has been reduced from 35 minutes to 5 minutes.，Can be reached more quicklyLevent、MaslakAnd other busy business districts and financial centers.，It brings great convenience for local residents to travel and consume.。