WANG Ying-chao, SHANG Yue-quan, JING Hong-wen, et al. Optimization of construction scheme of tunnel collapse and treatment effect[J]. 2011, 32(S2).DOI:
it is important to select appropriate construction scheme. Based on the engineering condition of tunnel collapse in Wuzhuling
two different construction schemes are simulated by the nonlinear finite element method. Compared with annular drift method
double-side-drift method can better control the displacements of surrounding rock
improve the force status of surrounding rock
decrease the force of primary support and make the range of plastic zone smaller. Therefore
double-side-drift method is more suitable for tunnel collapse treatment. Then
the analysis of site monitoring measurement shows that convergence displacement and vault crown settlement tend to stable condition quickly and the deformation value is smaller. The subject of tunnel is in stable state and has no deformation. It is shown that the treatment effect of double-side-drift method which is selected to through tunnel collapse is significant.