November 2

Construction site of Bid 4 of Shenzhen-Shantou Railway

China Railway Equipment“Pingshandong- Number 4 ”

Cutter head of ultra-large diameter slurry balance shield machine

Safe hoisting、Go down the well smoothly

It marks that the shield assembly work of the project has made phased progress.

The tunneling construction of the project has officially entered.“Countdown”

Shenzhen-Shantou Railway starts from Xili Station, the hub of Shenzhen.，Through Shenzhen、Huizhou-Shenzhen-Shantou Special Cooperation Zone，Introduction to Shenzhen-Shantou Station of Guangzhou-Shantou Railway，The total length is about 125.52 kilometers，Including 29.Shield section of 026 km tunnel。Among，The total length of the shield section of Shenzhen-Shantou Railway Bid 4 Project is 9.004 kilometers，Divided into“Pingshandong-Number 3”“Pingshandong- Number 4 ”Two shield machines for construction，The cutter head is hoisted into the well this time.“Pingshandong- Number 4 ”。“Pingshandong- Number 4 ”A normal-pressure cutter head is adopted，Excavation diameter 14.31 meters，The total length of the host is about 15.4 meters，The total length of the whole machine is about 122 meters.，The total weight is about 3848 tons，Among，The heaviest single component cutter head is about 550 tons.。

That morning，Painted with dragons.“Pingshandong- Number 4 ”Shield cutterhead，With the help of the gantry crane，Slowly from the ground“Stand”，Finish“Swivel in the air”After，Accurately descend to the predetermined position of the originating well，Precise with shield machine“Fit”。

It is the most difficult to hoist the cutterhead in the whole shield machine hoisting and assembly stage.、A process with the highest risk factor。Hoisting down the well“Pingshandong- Number 4 ”The cutter head of the shield machine is formed by assembling and welding a middle block and six side blocks on the ground，It weighs about 550 tons.。The painting of the cutterhead adopts the traditional Chinese culture.“Dragon”The image of，It means that the project team is steady and steady.，Build Digital Shenshan、Confidence in high-speed rail benchmarking、Determination and good wishes.。After the cutter head of the shield machine goes down the well, the main machine of the shield machine will be moved forward.，Downhole assembly of rear supporting trolley、Move forward、Connect the pipeline、Synchronous debugging、Negative ring assembly and other construction，Tunneling is expected to begin by the end of December.。

The newly-built Shenzhen-Shantou Railway is a national railway.《Medium and long term railway network planning》“Eight horizontal and eight vertical”The main channel of high-speed rail is an important part of the coastal channel.，It is a key project to improve the rail transit construction in Guangdong-Hong Kong-Macao Greater Bay Area.，After its completion, it will greatly strengthen the Guangdong-Hong Kong-Macao and Haixi Economic Zone.、Links in the Yangtze River Delta Region，And further enhance the driving and radiating role of Shenzhen in the economic development of eastern Guangdong.。After the completion of the project，The traffic time from Shenzhen-Shantou Cooperation Zone to Shenzhen Central District will be greatly shortened to 30 minutes.，It is of far-reaching significance to promote the construction of Shenzhen-Shantou Special Cooperation Zone.。