盾构隧道穿越软硬不均地层时掌子面稳定性分析  

Stability Analysis of Tunnel Face during Shield Tunnel crossing Soft-hard Interphase Layer

作　　者：康芮[1] 舒东利[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《路基工程》2018年第1期194-199,共6页Subgrade Engineering

摘　　要：在盾构隧道施工中,由于地层条件以及盾构掘进参数设置的多变性,使盾构给予开挖面的支护压力有较大的波动。针对广东肇庆市盾构隧道穿越软硬不均地层的施工,运用数值模拟研究由于开挖面支护压力变化而引起的地层变形规律、开挖面失稳后的破坏状态,并最终确定使开挖面保持稳定的极限支护压力。The supporting pressure applied by shield to excavation face is subject to large fluctuation as a result of diversity from the layer condition and the shield tunneling parameter setting. When tunneling across soft-hard interphase layer in Zhaoqing, Guangdong, numerical simulation was used herein to study the layer deformation laws caused by the change of supporting pressure on the excavation face, and the destruction status of excavation face after instability. Finally, the limit supporting pressure to keep stability of excavation face was determined.

关 键 词：泥水加压 盾构隧道 数值模拟 开挖面稳定性 支护应力比 围岩 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]