Stability Analysis of Tunnel Surrounding Rock Based on Coupled Fluid-Solid Theory
Taking Chaijiazhuang Tunnel of Lingnan Expressway as project background, the stability analysis of surrounding rock was performed based on the coupled fluid-solid theory. The distributions of stress field, displacement field and plastic zone of rock mass after excavation of tunnel were discussed considering coupled effect between flow and stress under the condition of different rock level and tunnel depth. Compared with the calculation results of not considering coupling effect, the maximum deformation, maximum principle stress and plastic zone size of wall rock were obviously increased when considering coupling effect, which showed a remarkable influence of coupled fluid-solid effect on the stability of tunnel surrounding rock. Some conclusions were drawn and may provide some guidance to the design and construction of tunnels in water-rich strata.
F. M. Wang et al., "Stability Analysis of Tunnel Surrounding Rock Based on Coupled Fluid-Solid Theory", Applied Mechanics and Materials, Vols. 90-93, pp. 1900-1903, 2011