February 8th 2017, CREG R297 slurry TBM has been successfully assembled on jobsite in Wangjing district, which is located in Chinese capital Beijing, site commissioning will be taken place later on.

Early 2016, CREG has signed a contract with China Railway Tunnel Group (CRTG) to supply two slurry machines numbered R297 and R298 for railway lot13 from Beijing to Shengyang, which is considered the crucial section of this alignment. The tunnel is built mainly in alluvium deposits, the geotechnical investigation shows that clay, silt and silty clay will be accoutered during TBM excavation.



Challenges:

Shallow overburden: Near the launching area, the ground cover is only 10,5m, how to prevent the potential collapse will be a major issue for TBM launching.
Cross important landmark: Tunnel will pass through beneath capital airport, highway and intensive residential buildings etc. Differential settlement must be limited during tunnelling.
3680m without shaft: TBM must continuously function without any fatal mistake.
Highlights:

Anti-wearing treatment for special place of cutter head.
Zero spillage pipe extension system
Full coverage flushing system
The TBM main characters are as follows:

Total length: 82 m
Boring diameter: 10,90 m
Motorization: Electrical drive
Total drive power: 2000 kW
Max. advance speed: 50mm/min
R298 is now assembling in main factory of CREG headquarters, the factory acceptance will be held in 1st march.

We expect an outstanding performance of CREG slurry machine.

News Source: http://www.creg-germany.com/news.php?from=singlemessage&isappinstalled=0&nsukey=j0bPCqDvozYSP4nFpK0XNuDGNhNqI%2FKT6g3kSy8WoCnSC1QJ2a1FKkBZApN4jL49OLJWQnFepR2We+1vhSHOdDoVKMiuGkabCGt5Txg0kHcFnLWk5APBvBjZKwgwe425%2F1EicmVAcYSiBSi+1Na3qKGesvL41LlD0+Icl9I7x14ZrOMup83YqdckqyZaZ%2FC5