Tunnel face stability and ground settlement in pressurized shield tunnelling
作者： Yi Su , Guo-feng Wang , Qing-hong Zhou
DOI: 10.1007/S11771-014-2101-6
关键词:
摘要: An analysis of the stability large-diameter circular tunnels and ground settlement during tunnelling by a pressurized shield was presented. innovative three-dimensional translational multi-block failure mechanism proposed to determine face support pressure large-shield tunnelling. Compared with currently available mechanisms, has two unique features: (1) supporting applied tunnel is assumed have non-uniform rather than uniform distribution, (2) method takes into account entire excavation instead merely an inscribed ellipse. Based on discrete element method, numerical simulation Shanghai Yangtze River Tunnel carried out using Particle Flow Code in dimensions. The immediate movement excavation, as well behaviour face, movement, excavated area, considered before modelling process.
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