大跨度隧道软弱围岩加固效果数值分析  

Numerical Analysis on Reinforcement of Soft Rock in Large-span Tunnel

作　　者：郑军华 史敏[2] 王飞[3] 

机构地区：[1]浙江省交通规划设计研究院,浙江杭州310006 [2]杭州市财政性投资项目评审中心,浙江杭州310009 [3]安徽省交通规划设计研究院,安徽合肥230031

出　　处：《交通标准化》2009年第21期8-13,共6页Communications Standardization

摘　　要：应用有限元方法对弁山三车道隧道软弱围岩加固效果进行数值分析,针对不进行围岩加固、对拱圈围岩进行加固、对拱圈及隧底围岩进行加固等三种方案,对比分析隧道围岩与结构位移、围岩应力、围岩塑性区、初期支护和二次衬砌受力等指标,结果表明,应采取对拱圈和隧底围岩全面加固的方案,并对拱脚进行重点观测。研究成果可供类似大跨软岩隧道施工参考。The reinforcement effect of soft rock is analyzed through numerical analysis with FEM for Bianshan three-lane tunnel. Three schemes are studied including no reinforcing, reinforcing the arch surrounding rock, reinforcing the arch surrounding rock and the base rock. Contrast analysis is made in allusion to the deformation of the rock and structure, the stress and plastic zone of surrounding rock, the stress of the initial supporting and second supporting. The results show that reinforcing the arch surrounding rock and the base rock is essential for Bianshan tunnel to ensure the safety. In addition, arch foot should be strictly monitored. The conclusions can be adopted in other similar tunnels.

关 键 词：隧道 大跨度 软弱围岩 加固 数值模拟 

分 类 号：U452.12[建筑科学—桥梁与隧道工程]