DS Dichtungstechnik

New benchmark in sealing systems for the Hong Kong tunnel

Figure: DS Dichtungstechnik

The pipes needed for the new Hong Kong tunnel were tested in a joint project of the companies Gollwitzer, Haba Beton and DS Dichtungstechnik

Figure: DS Dichtungstechnik

Franz Bartlechner, General Manager of Haba (at the back), convinced himself of the proper verification concerning the tightness tests

Figure: DS Dichtungstechnik

The external chamber pressure, simulated by means of a steel sleeve above the two reinforced-concrete pipes, amounted to a maximum of 8.25 bar and could be kept for 60 minutes without pressure loss

Figure: DS Dichtungstechnik

Schematic illustration of the sealing joint

Figure: DS Dichtungstechnik

The longest and deepest undersea highway tunnel ever built in Hong Kong will stretch between the western New Territories and Lantau Island. The building project aimed at the design and construction of the dual two-lane Tuen Mun-Chek Lap Kok Tunnel with a length of approx. 5 km at a depth of 50 m below sea level as well as the associated reclamation of about 16.5 ha of land.

According to DS Dichtungstechnik the world’s largest Tunnel Boring Machine (TBM) of 17.6 m in diameter and two mix-shield TBMs of 14 m in diameter each were used to construct this road tunnel, using the pipe jacking method....