German Minister for Economic Affairs Sigmar Gabriel fascinated by tunnel construction in Hong Kong
Dec 14, 2016
Sigmar Gabriel, the German Minister for Economic Affairs and Energy, took the time in early November to inspect construction progress at one of the currently most important inner-city tunnel projects in Hong Kong – powered by high-tech Herrenknecht tunnel boring machines. The Minister and his delegation were fascinated by how top German technology is being used to develop groundbreaking infrastructure in Hong Kong. The mega-city is permanently rising above itself. Investments are being made in high-performance underground tunnel structures in particular to keep abreast of development by the city, setting international standards and realizing technical flagship projects.
“The progressive dimensions at which Hong Kong is being developed not only on the surface but also underground are very impressive. It makes me very optimistic that German companies and top technology are playing a key role when it comes to building state-of-the-art and pioneering infrastructure projects in the Asian-Pacific region,” Gabriel said.
The joint venture selected Herrenknecht as a partner for highly-innovative tunnelling technology (1x Mixshield, 1x Variable Density TBM, Ø 7.41 m each). Both companies are long-standing project partners and have successfully realized a variety of challenging premier projects in the southern Chinese commercial metropolis.
The five-kilometer long subsea tunnel, being an integral part of Tuen Mun-Chek Lap Kok Link, will help enhance the transportation network of Hong Kong as it will link the Northwest New Territories with Hong Kong's Airport.
Herrenknecht has been active in the Asian-Pacific region and China since the 1990s. Meanwhile, the company operates its own subsidiaries at six locations in China with a total of around 850 employees. Herrenknecht technology has been applied in more than 700 projects to date in China. The construction of metro lines alone has involved more than 240 Herrenknecht TBMs boring their way through the underground in 25 Chinese cities.
Machine type: 1x Mixshield S-988, 1x Variable Density TBM S-989
- Diameter: 2x 7.41m
- Drive power: 1,280kW, 1,920kW
Variable Density TBM for highly variable ground conditions
- combines the advantages of Mixshield and EPB Shield
- possibility to switch between various operational modes smoothly
- possibility to vary the density of the support medium in the excavation chamber to balance the pressure conditions at the tunnel face. The high density mode closes the gap between Mixshield and earth pressure balance operation.
Project: Shatin to Central Link Contract No. 1128, Hong Kong
Client: MTR Corporation Limited
Contractor: Dragages-Bouygues joint venture
Geology: Extremely varying ground conditions along the complete tunnel alignment (slightly to completely decomposed granite, marine deposits, fill, sand, silt, clay)
Advance lengths: 2x 675m, 2x 450m
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