Impact of Interval Shield Tunneling on Under-construction Mined Tunnels

Objective Through numerical simulation, the mechanical impact of interval shield tunneling on adjacent under-construction mined tunnel is evaluated.

Method Based on ANSYS finite element analysis software, a mechanical model of a newly constructed shield tunnel and an under-construction mined tunnel is established to investigate the effects of shield tunneling on the stress redistribution in surrounding soil and the structure of the under-construction mined tunnel. A project under typical geological conditions is selected as a case study to analyze the influence of shield tunneling on the internal forces and displacement field of the under-construction mined tunnel structure, as well as the surrounding land subsidence.

Result & Conclusion  Shield thrust may cause a certain degree of displacement and deformation to nearby under-construction mined tunnels. However, through reasonable design and the implementation of reinforcement measures, the deformation can be controlled within an acceptable range.