Abstract Aimed at the problems encountered during shield tunnelling in a waterless strata with large-particle cobbles and boulders in Beijing, and using the construction of Beijing Metro Line 9 as an example, this paper puts forward a shield-selection concept, i.e. "discharging as the main measure, sealing as the supplementary measure," and conducts adaptability research and upgrades to some key equipments like the cutterhead, cutting tools, slurry and foam injection system, screw conveyor system, synchronous grouting system, and cutterhead driving system. The results show that the upgraded shield has a higher driving speed and lower construction costs, and is applicable to the waterless strata with large-particle cobbles and boulders.
Abstract：
Aimed at the problems encountered during shield tunnelling in a waterless strata with large-particle cobbles and boulders in Beijing, and using the construction of Beijing Metro Line 9 as an example, this paper puts forward a shield-selection concept, i.e. "discharging as the main measure, sealing as the supplementary measure," and conducts adaptability research and upgrades to some key equipments like the cutterhead, cutting tools, slurry and foam injection system, screw conveyor system, synchronous grouting system, and cutterhead driving system. The results show that the upgraded shield has a higher driving speed and lower construction costs, and is applicable to the waterless strata with large-particle cobbles and boulders.
GUO Cai-Xia-1,
2 ,
Wang-Meng-Shu-1 etc
.Selection of a Shield for Tunnelling in Waterless Strata with Large-Particle Cobbles and Boulders[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(4): 13-17
2014, Vol. 51 