期刊论文

Numerical Simulation Study on Construction Process of Partial Pressure in Joint Arch Tunnel

中文

湖南城市学院学报(自然科学版)

1672-7304

2015

24

1

1-6

10.3969/j.issn.1672-7304.2015.01.001

湖南省教育厅一般科技计划资助项目（14C0214）； 湖南省教育厅青年科技资助项目（13B010）；

本校为第一机构

采用有限元法数值模拟云南思小高速公路的双连拱隧道中导洞施工法分步开挖过程,研究双连拱隧道在偏压作用下施工过程的力学行为.通过动态数值模拟,得到隧洞在不同开挖顺序下围岩的应力变化和塑性区的发展范围以及中隔墙、衬砌的应力情况;对比分析不同施工方案各关键工序的模拟结果,并从应力转移的角度分析洞室开挖的影响,得到偏压作用下连拱隧道施工顺序的优选方案.

Advancing middle drift construction process of Si-xiao joint arch tunnel in Yunnan is simulated with FEM, and then the structural mechanics behavior in joint arch tunnel construction under partial pressure is studied. The results under different excavation sequences which are the surrounding rock stress variation, plastic area development, stress of tunnel＇s mid-partition and lining are got through dynamic numerical simulation. By means of comparatively analyzing simulation results on key steps of various construction schemes and stress transf...