Abstract Water-rich mixed ground is one of the complex geological conditions that may be encountered during shield construction. Using the Dalian Metro line 2 as an example, the construction techniques for shield-driven tunnels are described in respect to shield selection and launching. Considering such difficulties as a small radius, a water-rich fracture zone, and cutter control in hard rock, corresponding countermeasures were adopted concerning the tunnel axis alignment, driving speed control, and cutter management system. Engineering experience proves that the selected shield is suitable for the geological conditions in Dalian and that it is able to adapt to the water-rich mixed ground, therefore meeting relative requirements.
Abstract：
Water-rich mixed ground is one of the complex geological conditions that may be encountered during shield construction. Using the Dalian Metro line 2 as an example, the construction techniques for shield-driven tunnels are described in respect to shield selection and launching. Considering such difficulties as a small radius, a water-rich fracture zone, and cutter control in hard rock, corresponding countermeasures were adopted concerning the tunnel axis alignment, driving speed control, and cutter management system. Engineering experience proves that the selected shield is suitable for the geological conditions in Dalian and that it is able to adapt to the water-rich mixed ground, therefore meeting relative requirements.
FENG Huan-Huan,
Chen,
KUI etc
.Discussion of Key Construction Techniques for a Shield-Driven Tunnel
in a Water-Rich Mixed Ground
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(1): 186-191
2014, Vol. 51 